EP3067158B1 - Improvements to a gas-powered fastening tool - Google Patents
Improvements to a gas-powered fastening tool Download PDFInfo
- Publication number
- EP3067158B1 EP3067158B1 EP15200997.3A EP15200997A EP3067158B1 EP 3067158 B1 EP3067158 B1 EP 3067158B1 EP 15200997 A EP15200997 A EP 15200997A EP 3067158 B1 EP3067158 B1 EP 3067158B1
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- combustion
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
Definitions
- the invention relates to improvements for a gas fastening tool and a gas fastening tool comprising at least one of these improvements.
- the state of the art includes the documents EP-B1-123 717 , EP-B1-1 243 383 , EP-B1-2 087 220 , EP-A2-1 371 457 , EP-A2-1 375 074 , EP-A2-1484138 and US-A1-2006 / 226193 .
- Sealing or fixing tools are tools comprising an internal combustion engine operating by firing a fuel-air mixture in a combustion chamber, the fuel being injected into the chamber by a device injection from a fuel cartridge. Such tools are intended to drive fasteners in support materials (such as wood, concrete or steel) to fix parts. Gas tools are now widespread and can be used to install fasteners such as staple, nail, point, pin, etc.
- fuel for an internal combustion engine there may be mentioned for example gasoline, alcohol, in liquid form and / or gas.
- such a tool is portable and comprises a housing in which is mounted the propulsion internal combustion engine of a driving piston of a fastener.
- a tool may also include a battery power supply and a handle, handling and shooting on which is mounted a detent actuating the tool.
- the present invention provides improvements to this technology.
- the invention relates to combustion chambers or pre-combustion chambers for a gas fastening tool, comprising a casing defining a combustion cavity having a generally elongate shape of longitudinal axis X, and a second combustion cavity, ignition means , such as a spark plug, being situated at a longitudinal end of said first cavity and a longitudinal end of said first cavity, opposite said ignition means, being in fluid communication with said second cavity, characterized in that said first cavity has a variable cross section along said X axis, said first cavity having a generally stepped shape and comprising at least a first cross section portion S1 and a second cross section portion S2, with S1 less than S2, said ignition means being located in said first portion.
- the invention can thus reduce the size of the chamber, for example by reducing its length. This reduction in length can reduce the travel time required for the flame to cross the chamber longitudinally, thereby reducing the time of a firing cycle by the tool.
- the invention can further optimize the spatial distribution of the mass of the chamber inside the tool, for example to move the center of gravity of the tool in a predetermined area.
- the present invention also relates to a gas fastening tool, comprising a chamber or several chambers as described above, and / or a device as defined above.
- the tool 10 shown on the figure 1 comprises a housing 12 in which there is an internal combustion engine 14, with a combustion chamber for containing a mixture of air and fuel whose ignition causes the propulsion of a piston intended to drive a fastener element extracted from a feed magazine 16, the fastener being adapted to be anchored in a support material, at the outlet of a guide-tip 18 extending to the front of the housing 12. All these components gas fastening tools are well known to those skilled in the art and therefore they have not all been represented in the drawing.
- the tool housing has an axis 20 along which the drive piston moves and in the tip guide 18 the fasteners.
- the tool comprises a handle 22 for gripping and handling the tool. It extends, from the housing and outside thereof, substantially perpendicular to the axis 20, slightly inclined on it according to the application of the tool and the ergonomics during use.
- the handle 22 is also used for firing, by an actuation trigger 24 mounted on it, in the zone 26 of its connection to the housing 12.
- the fuel supply to the combustion chamber of the engine 14 is effected by means of an injection device 28 from a cartridge 30 of combustible gas.
- the injection device 28 and the cartridge 30 are housed in an arm 32 connected to the housing 12, which extends substantially perpendicular to the axis 20, in front of the handle 22, and in which the magazine 16 is also provided.
- Another arm 34 extends substantially parallel to the axis 20, between the handle 22 and the arm 32, so as to form a bridge between the two, the (lower) side opposite the housing 12.
- figure 1 Various features will now be described that can be integrated, independently of each other or in combination with each other, into tool 10 of the present invention. figure 1 .
- the fuel is in the liquid state in the cartridge and must be evaporated, the fuel gas being intended to be mixed with air before being burned in the combustion chamber of the engine.
- An injection device of a gas fixation tool must thus allow the evaporation of the fuel.
- the document EP-B1-2 087 220 discloses a liquid fuel supply and evaporation system for converting a liquid fuel to a gaseous fuel.
- This system comprises an evaporator element associated with a heated casing for heating the evaporator element.
- the evaporator element is made of sintered metal and has a generally conical or frustoconical shape.
- This technology is complex and relatively bulky, in particular because of the particular shape of the evaporator element. This technology is also relatively expensive.
- this evaporator element is relatively fragile and has a low resistance to vibrations and shocks generated during the operation of a fixing tool.
- the fuel used to operate these tools may contain lubricants, additives, or even impurities, the evaporator element can get clogged thereby blocking the passage of fuel through it. The result of this situation is the malfunction of the tool, which requires disassembly and cleaning of the evaporator element and possibly its replacement because the cleaning operation can damage this element.
- the filters consist essentially of a screen, a lattice, a grid, a fabric, a fabric, a foam, or fibers. These filters are made of metal or plastic, or from mineral or natural fibers. The purpose of these filters is to trap the particles contained in the fuel while allowing the fuel to flow through the filter.
- the evaporator element is removed.
- the use of a filter arranged in the simplified injection device, combined with an evaporation cavity makes it possible to optimally vaporize the fuel for the purpose of feeding the combustion chamber of the combustion chamber. tool.
- the figure 2 represents an embodiment of the injection device 28.
- a valve 40 for calibrating a quantity of liquid fuel is interposed between the liquid fuel cartridge 30 and the simplified evaporator unit 42.
- a filter 44 is disposed in a housing or bore 46 provided in the block 42.
- a predetermined quantity of liquid fuel is discharged from the cartridge 30 through the valve 40 into the block 42, passing through the filter 44, and arrives in the evaporation cavity 47.
- the block 42 is made of a heat-conducting material, such as metal.
- the liquid fuel flowing through the filter 44 is at least partially converted to gaseous fuel by the heat input of the ambient medium, which transmits calories to the evaporator block 42.
- the at least partially vaporized fuel continues to circulate in the block 42, and absorbs additional heat from the environment.
- the downstream portion of the block 42 includes an evaporation line 48, acting as a distribution manifold, to the combustion chamber 50 of the attachment tool.
- the sizing parameters of the device 28, and in particular of the cavity 47 and the pipe 48, such as the length, the diameter, the thickness, etc., are designed so that the fuel is entirely converted into the outlet of a downstream discharge orifice 51 of the pipe 48.
- the block 42 and / or the pipe 48 may optionally comprise one or more fins 52 disposed at least on one of their surfaces. .
- the gaseous fuel can be directly injected into the combustion chamber 50.
- the gaseous fuel leaving the discharge orifice 51 can supply one or more fuel outlet nozzles 54 and
- the combustible gas may alternatively supply a jet pump 56 of the venturi type, into which ambient air is entrained in the jet pump 56, and mixed with the gaseous fuel injected by the jet fuel. or the nozzles 54, so as to form an air-fuel mixture for feeding the combustion chamber 50.
- This evaporator block 42 is therefore easier to manufacture and less expensive.
- the filter is flat and therefore relatively simple. It extends substantially in a plane parallel to the axis Z of the cartridge 30. It has for example a form of pellet, disk or block. It is much simpler and less fragile than the complex parts used in the prior art. Therefore, the simplified evaporator block is also easier to maintain when needed, although the need for maintenance of such a block is also significantly reduced.
- the figure 3 is a schematic perspective view of device 28 of the figure 2 and shows in particular that the pipe 48 is formed in one piece with a part of the evaporator block 42.
- the pipe 48 has a general shape of S or L.
- the cavity 47 has a T-shaped section whose upstream portion of larger transverse dimension forms the housing 46 for receiving the filter.
- the cavity 47 communicates with a rectilinear end portion of the pipe 48.
- the pipe comprises another rectilinear end portion which defines the discharge orifice 51. These two portions are parallel and connected to each other by a median rectilinear portion of the duct, which extends substantially parallel to the longitudinal axis Z of the cartridge 30. This rectilinear portion may be closed sealingly by a screw at its connection to the straight end portion which defines the discharge port 51.
- the evaporator block 42 comprises a bore in which is mounted and slidable, along the longitudinal axis Z of the cartridge 30, an actuating member 58.
- This actuating member has a rectilinear elongated shape and comprises an internal bore. 60.
- This bore comprises a first axial portion which extends along the member 58 and opens at the lower end thereof, and a radial portion which extends between the end upper axial portion and the periphery of the organ. The outlet of this radial portion is located next to the filter 44.
- the member 58 is movable between two positions: a high position or rest represented at the figure 4a and a low or working position represented at the figure 4b . In both cases, the aforementioned radial outlet of the bore is located opposite the filter 44. Seals are provided between the member 58 and the bore in which it is mounted.
- the lower end of the member 58 is configured to cooperate by interlocking with a connecting end of the cartridge 30.
- the displacement of the member 58 from its rest position to its working position causes the release of a calibrated quantity of fuel from the cartridge 30.
- This fuel in liquid form, circulates in the bore 60 of the member 58 and passes through the filter 44, which retains any impurities, before entering the cavity 47 in which is initiated the conversion of the liquid fuel gaseous fuel.
- the fuel circulates in the pipe 48 to complete its evaporation and arrives in the gaseous state at the nozzle 54. It is then sprayed into the jet pump 56 and mixed with air which enters the pump by venturi effect. the air-fuel mixture is then injected into the chamber 50 of the engine.
- the block 42 is located above the cartridge 30, the pipe 48 extends partly on one side of the cartridge, and the jet pump 56 has an orientation substantially perpendicular to the longitudinal axis Z of the or cartridge 48.
- the cartridge 30, the block 42 and the pipe 48 are housed in the arm 32 and the jet pump extends in the arm 34, the combustion chamber 50 then being housed in the handle 22 of the tool of the figure 1 .
- the filter 44 has for example a permeability less than 50 darcy and preferably between 10 to 33 darcy, which allows to filter particles with a diameter of between 7 .mu.m and 14 .mu.m, with an efficiency of 98 to 99.9%.
- a heat engine of a gas fastening tool comprises a combustion chamber and a working chamber in which a driving piston of a fastener is able to move under the effect of the explosion of the air mixture. -combustible in the combustion chamber.
- the engine comprises a pre-combustion chamber 60 and a combustion chamber 50.
- the first combustion chamber or pre-combustion chamber 60 initiates the combustion of the air-fuel mixture.
- This chamber 60 comprises a housing 62 which defines a combustion cavity 64 in which ignition means such as a spark plug 65 are mounted.
- the chambers 60, 50 are separated from one another by a valve 66. Pre-combustion of the mixture in the chamber 60 causes an increase in pressure in the cavity 64. When this pressure exceeds a certain threshold, the valve opens and passes the fuel mixture through the chamber 50.
- the chamber 50 comprises a casing 68 defining a combustion cavity 70.
- the mixture arrives in the chamber 50 with a relatively high pressure.
- the flame from the chamber 60 reaches the chamber 50, the combustion at high pressure in the chamber 50 to improve the performance of the tool.
- the combustion 50 in the chamber causes an increase in pressure in the cavity 70, which forces the piston 78 to move in the working chamber 80.
- a pre-combustion chamber 60 of elongated shape a longitudinal end of which is connected to the combustion chamber 50, and whose opposite longitudinal end comprises the spark plug 64.
- the output power of the combustion chamber 50 can be increased up to fifty percent (50%) simply by extending the precombustion chamber 60.
- the precombustion chamber 60 has a predetermined length B and a predetermined width A, in which the length B is substantially greater than the width A. More particularly, the ratio of the length B to the width A, known as the ratio or ratio the appearance of the precombustion chamber 60, is at least 2: 1, and can be much larger with an optimum around 10: 1 according to the same document.
- a pre-combustion chamber may have a round, oval shape, rectangular, or other, in cross section, as long as its length is greater than its width.
- the pre-combustion chamber 60 of the prior art has a relative elongation B which is detrimental for the tool in terms of size.
- Another disadvantage of this pre-combustion chamber 60 is that the longer the precombustion chamber, the longer the delay between the ignition of the spark and the ignition of the combustion chamber 50 is important. This can increase the duration of the firing cycle of the tool, which is problematic for some fastening applications.
- the design of the pre-combustion chamber 60 is not optimal in terms of ergonomics.
- the inventors have kept the total volume of the chambers 50, 60 constant.
- the total quantities of air mixture -combustible are comparable, and therefore the same total amounts of raw energy are available.
- V1 The volume of the pre-combustion chamber 60 is designated V1, and the main volume of the combustion chamber 50 is V2.
- V1 + V2 is constant for all the tests.
- V1 is kept the same for all the exemplary embodiments.
- the pre-combustion chamber has, from the spark plug 65, in the direction of the combustion chamber 50, an increasing section.
- the pre-combustion chamber 60 has two parts, the first part having the spark plug 65 and having a first maximum inside diameter which is smaller than the minimum inside diameter of the second part.
- At least one diameter, and preferably both diameters of the first and second portions are constant.
- the elongate chamber of constant cross section is replaced by two portions, one upper, has a larger cross section S2 than S1 of the other, lower.
- the chamber 60 thus has a generally T-shaped longitudinal section. Consequently, while keeping the volume V1 constant, this embodiment has a length less than the length B of the prior art. As a result, the size of the tool can be reduced.
- the reduction of the length of the pre-combustion chamber 60 makes it possible to reduce the distance between the spark plug 65 and the combustion chamber 50, which has the advantage of reducing the ignition time of the chamber 50, as well as the overall duration of the a shooting cycle.
- the invention thus provides an effective precombustion chamber for a tool that is less bulky and can operate faster than those of the prior art.
- the figure 7 shows an alternative embodiment of the precombustion chamber 60.
- This figure shows a precombustion chamber 60 which has a portion having a horizontal extension component forward, so that the shortest fluid flow line between the spark plug 65 and the connection to the combustion chamber 50a (at least partly) a horizontal component inclined towards the rear of the tool, coming from the spark plug.
- the pre-combustion chamber is no longer located entirely on one side of the tool so that the combustion chamber and the working chamber 80 do not necessarily form a conventional L-shaped architecture, that is, say a tool similar to a "gun".
- the pre-combustion chamber 60 comprises at least two parts, the first of these parts being the one connected to the combustion chamber 50 and the second part being the furthest away from the combustion chamber 50.
- the lateral wall 82 of the pre-combustion chamber 60 in the first part is closer to the rear end of the tool, than is the side wall of the pre-combustion chamber in the second part.
- the second portion comprises the spark plug 65.
- the tool is configured such that the tool is clamped around the precombustion chamber.
- At least one diameter, and preferably both diameters of the first and second portions are constant.
- the elongate chamber of constant cross section is replaced by two portions, one upper, has a larger cross section S2 than S1 of the other, lower.
- the chamber 60 thus has a generally L-shaped longitudinal section. Consequently, while keeping the volume V1 constant, this embodiment has a length less than the length B of the prior art. As a result, the size of the tool can be reduced.
- the pre-combustion chamber 60 is no longer rectilinear, but includes a curvature to move the handle of the tool (which contains the pre-combustion chamber) closer to the center of gravity of the 'tool.
- a horizontal part is present.
- the side wall 83 (left) of the pre-combustion chamber in the portion with the spark plug is positioned closer to the side wall (right) 84 of the portion connected to the combustion chamber.
- V1 While keeping constant V1 with respect to the prior art, the invention makes it possible to keep a level of performance comparable, or even identical, in terms of energy production, in a tool that is much better balanced.
- the combustion chamber 50 of a tool is generally adjacent to the working chamber 80 in which the piston 78 is moved under the effect of the combustion of the air-fuel mixture.
- the combustion chamber 50 has a generally cylindrical shape on the side of the working chamber 80.
- this combustion chamber 50 has the shape of a flat cylinder having a diameter D and a height H, and its cavity 70 has a volume V2.
- this chamber 50 does not lead to an optimum output of energy. They found an improved form for the combustion chamber that improves energy production.
- FIG. 8 An example of a preferred embodiment is presented at figure 8 wherein the combustion chamber defines a spherical or ovoid combustion cavity.
- This spherical / ovoid shape leads to better mixing, and proper fuel distribution and flue gas scavenging. It has been discovered that this form does not have dead zones because of the presence of edges in the cavity. These edges affect both the flow and the combustion flame. The flow tends to stop as the edges approach, resulting in dead zones. The flame is also affected by these edges because it tends to go out when approaching the edges. The new form removes most, if not all, of the damaging dead spots that exist in the prior art. Even if the combustion volume is not a perfect sphere, any edge that can be removed from the volume of the combustion chamber optimizes the inlet and outlet flows of the chamber for optimal feeding with the air-fuel mixture and the optimal flushing of the combustion gases.
- a partially spherical shape can also be replaced by a partially ovoid shape or any other shape that does not have or has a minimal number of edges, for example a where the radius of curvature of the upper part of the bottom wall (here on the left) of the combustion chamber 50 is greater than or equal to 25%, preferably 50% to the smallest diameter of the combustion chamber of the technique previous (for example, H).
- the combustion chamber 50 comprises a casing 68 defining three openings, two of which 50a, 50b are aligned on the same axis U, which corresponds to the longitudinal axis of the pre-combustion chamber or part thereof, and a third 50c is aligned on a Y axis substantially perpendicular to the axis U.
- the casing 68 comprises a first half-shell 68a having a first wall 68aa in sphere portion.
- This first wall 68aa is a median wall which is located between two end walls 68ab each in cylinder portion.
- the end walls 68ab partially define the openings 50a, 50b of axis U.
- the casing 68 comprises a second half-shell 68b having two end walls 68bb each in cylinder portion and defining the rest of the axis openings. U, and a cylindrical wall 68ba defining the Y axis opening.
- the opening 50a provides fluid communication with the cavity of the pre-combustion chamber.
- the opening 50c provides fluid communication with the internal cavity of the working chamber, and the opening 50b provides fluid communication with the atmosphere.
- the opening 50a can be closed by the said valve 66 and the opening 50b can be closed by a valve 84 whose moving body is carried by a rod which also carries the valve 66.
- the performance of a combustion-powered fastener tool is based in particular on the ability of the piston to effectively convert the pressure energy generated by the combustion of the explosive mixture into kinetic energy transferred to the fastener. This efficient conversion is affected by leaks that occur between the piston and the housing of the working chamber.
- pistons and housings are very well known because they are used in all tools.
- the combustion chamber design and combustion technology may vary from tool to tool, but the reciprocating piston in the crankcase will remain essentially the same for the different fasteners.
- the piston used in such a tool conventionally comprises dynamic sealing means, that is to say means used to ensure a seal between the piston and the housing of the working chamber during the displacement stroke of the piston. This stroke results from a pressure difference between the two sides of the piston (combustion for driving and vacuum for return).
- the seals according to the prior art are configured to provide a dynamic seal.
- the piston In its initial retracted position, the piston must first be kept sealed to contain the pressure generated by the combustion of the air-fuel mixture. As mentioned above, whenever the mixture is supercharged, or when the combustion technology uses a pre-combustion chamber, the resulting pre-pressure generated by the pre-combustion chamber, prior to ignition of the combustion chamber, must remain tight and maintain the combustion chamber without leakage. During this preliminary phase, the piston must therefore be watertight as much as possible. Ideally, the piston should also remain stable to keep the volume of the firebox low to maximize pressure until combustion is almost complete. Ideally also, in this preliminary phase, the piston should be maintained until a peak pressure occurs and combustion ends. This requirement to maintain the piston at a preliminary stage has been addressed in the prior art by using magnets or mechanisms, in particular balls, springs and / or cams. All of these piston retention mechanisms are generally bulky, complex and expensive.
- the requirement is to ensure maximum sealing between the piston and the housing of the working chamber and therefore to have a maximum static seal when the piston is in the rest position.
- the piston should be held in this position, in a sealed manner, until the pressure peak is reached to maximize the transfer of energy in the form of combustion pressure to the driving kinetic energy of the fuel. piston.
- static seals are generally flexible seals (O-rings, etc.) made of flexible materials such as rubber, silicone, etc. These are effective when there is no relative movement between the parts or if the movements are limited and slow.
- dynamic seals are more capable of sealing between two moving parts, even though the seal as such is not as good as with a gasket.
- dynamic piston seals can be metal segments such as steel, which operate efficiently at high speeds and at high temperatures.
- Dynamic seals also exist, such as lip seals, or composite seals, for example, although they are generally not as efficient as steel rings because of the high temperatures in the combustion engines.
- the working chamber comprises a cylindrical housing for example, a piston and a first seal to seal the piston in the retracted position or rest position of the piston (static seal), and a second seal - which is different the first seal - to seal the piston during its movement (dynamic seal).
- each seal can be optimally matched to the required sealing function and no compromise has to be found between dynamic and static sealing.
- the second seal is attached to the piston (for example, housed in a groove of the piston).
- the first seal and the second seal are both attached to the piston and the housing has a sealing surface for the first seal which is radially inside the sealing surface for sealing. the second seal.
- the casing thus has a radial projection inwardly of the inner cylindrical surface opposite to the first seal before / during the rest position.
- the first seal is attached to the housing (eg, housed within a groove of the housing).
- no radially inward protrusion which holds the seal or serves as a radial sealing surface (for example in the form of a cylindrical lateral surface) is present.
- All the exemplary embodiments show a working chamber 80 comprising a housing 90 inside which is slidably mounted a piston 78, the internal cavity 92 of the working chamber communicating with the internal cavity of a combustion chamber such as that described in the foregoing.
- the piston 78 is shown in its retracted or rest position, as is known in the art and has already been explained above, and moves (downward from the orientation of the figures) in the housing 90 to drive a fastener. During its stroke, the piston may eventually pass to the right of an exhaust port 94.
- the figure 10a refers to an exemplary embodiment
- the piston 78 comprises a static seal 96 used to seal the piston in the preliminary phase of the actuation of the tool.
- the gasket 96 is carried by the piston and housed in a groove of the piston.
- the piston also comprises a dynamic seal 98 housed in a groove of the piston.
- the piston is designed so that the sealing surfaces for the seals are different.
- the diameter of the sealing surface of the static seal 96 is smaller than the diameter of the sealing surface of the dynamic seal 98.
- the dynamic seal remains in position. contact with its sealing surface throughout the race.
- the dynamic seal is able to withstand repeated passages at the exhaust port 94, there is no resistance problem for this seal.
- the seal 96 seals at the beginning of the race, until it emerges from its surface more small diameter sealing provided in the housing 90. Therefore, while the piston continues its course, the gasket is no longer in contact with its surface or with any other surface of the housing.
- the gasket 96 is never in contact with the exhaust port 94 and therefore not very stressed by friction.
- the gasket therefore ensures a seal that during the first phase of the operation. This situation makes it possible to use the static seal as effectively as possible without requiring compromise because it is not exposed to dynamic stresses.
- the gasket may be made of flexible material, such as rubber, because it will never be in contact with the exhaust port 94 and therefore will not suffer damage by friction.
- the static seal can be adjusted tight so that the seal is optimized. The other advantage of this tight fit is that the gasket participates in maintaining the piston in its rest position. So, the seal Static sealing also acts as a piston retaining mechanism according to the needs of optimal combustion performance.
- the figure 10c is another example of embodiment. It represents a simplification of the structure.
- the gasket 96 is held in place in a groove in the housing of the tool, not in the piston. There is no need for the sealing surfaces of the seals to be different. As the gasket does not follow the piston along its stroke, the gasket will not meet the exhaust port, even if the sealing surfaces are the same.
- the diameter of the surface of the static and dynamic seals can be identical, and the piston 78 can be designed with a single diameter. Therefore, this simplified exemplary embodiment also provides all the advantages in terms of static sealing, dynamic sealing and retention of the piston in its rest position.
- the Figures 10d and 10e are other examples of embodiment. They are actually another design examples of realizations of Figures 10a and 10b .
- the piston uses two different sealing surfaces for static sealing and dynamic sealing. The difference being that in the Figures 10a and 10b , the piston is the male part of the sealing surface of the static seal, while in the Figures 10d and 10e , the piston is the female part of the sealing surface of the static seal.
- the advantages of the invention are the static sealing, the dynamic sealing and the retention of the piston in its rest position.
- the piston 78 has an elongated shape and comprises a coaxial head and a rod.
- the seal static 96 is located in an area of the piston head, near a longitudinal end thereof, which is opposite the rod.
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Description
L'invention concerne des perfectionnements pour un outil de fixation à gaz ainsi qu'un outil de fixation à gaz comportant au moins un de ces perfectionnements.The invention relates to improvements for a gas fastening tool and a gas fastening tool comprising at least one of these improvements.
L'état de l'art comprend notamment les documents
Les outils de scellement ou de fixation, dits à gaz, sont des outils comprenant un moteur à combustion interne fonctionnant par la mise à feu dans une chambre de combustion d'un mélange air-combustible, le combustible étant injecté dans la chambre par un dispositif d'injection depuis une cartouche de combustible. De tels outils sont destinés à entraîner des éléments de fixation dans des matériaux supports (tels qu'en bois, en béton ou en acier) pour y fixer des pièces. Les outils à gaz sont aujourd'hui très répandus et permettent de poser des éléments de fixation du type agrafe, clou, point, épingle, etc. Comme combustible pour moteur à combustion interne, on peut citer par exemple l'essence, l'alcool, sous forme liquide et/ou gaz.Sealing or fixing tools, called gas tools, are tools comprising an internal combustion engine operating by firing a fuel-air mixture in a combustion chamber, the fuel being injected into the chamber by a device injection from a fuel cartridge. Such tools are intended to drive fasteners in support materials (such as wood, concrete or steel) to fix parts. Gas tools are now widespread and can be used to install fasteners such as staple, nail, point, pin, etc. As fuel for an internal combustion engine, there may be mentioned for example gasoline, alcohol, in liquid form and / or gas.
En général, un tel outil est portatif et comprend un boîtier dans lequel est monté le moteur à combustion interne de propulsion d'un piston d'entraînement d'un élément de fixation. Un tel outil peut comporter également une batterie d'alimentation électrique ainsi qu'une poignée de préhension, de manipulation et de tir sur laquelle est montée une détente d'actionnement de l'outil.In general, such a tool is portable and comprises a housing in which is mounted the propulsion internal combustion engine of a driving piston of a fastener. Such a tool may also include a battery power supply and a handle, handling and shooting on which is mounted a detent actuating the tool.
La présente invention propose des perfectionnements à cette technologie.The present invention provides improvements to this technology.
L'invention concerne des chambres de combustion ou de précombustion pour un outil de fixation à gaz, comportant un carter définissant une cavité de combustion présentant une forme générale allongée d'axe longitudinal X, et une seconde cavité de combustion, des moyens d'allumage, tels qu'une bougie, étant situés à une extrémité longitudinale de ladite première cavité et une extrémité longitudinale de ladite première cavité, opposée auxdits moyens d'allumage, étant en communication fluidique avec ladite seconde cavité, caractérisées en ce que ladite première cavité a une section transversale variable le long dudit axe X, ladite première cavité ayant une forme générale étagée et comprenant au moins une première portion de section transversale S1 et une seconde portion de section transversale S2, avec S1 inférieur à S2, lesdits moyens d'allumage étant situés dans ladite première portion.The invention relates to combustion chambers or pre-combustion chambers for a gas fastening tool, comprising a casing defining a combustion cavity having a generally elongate shape of longitudinal axis X, and a second combustion cavity, ignition means , such as a spark plug, being situated at a longitudinal end of said first cavity and a longitudinal end of said first cavity, opposite said ignition means, being in fluid communication with said second cavity, characterized in that said first cavity has a variable cross section along said X axis, said first cavity having a generally stepped shape and comprising at least a first cross section portion S1 and a second cross section portion S2, with S1 less than S2, said ignition means being located in said first portion.
L'invention peut ainsi permettre de réduire l'encombrement de la chambre, en réduisant par exemple sa longueur. Cette réduction de longueur peut réduire le temps de parcours nécessaire à la flamme pour traverser longitudinalement la chambre, ce qui réduit d'autant le temps d'un cycle de tir par l'outil. L'invention peut en outre permettre d'optimiser la répartition spatiale de la masse de la chambre à l'intérieur de l'outil, afin par exemple de déplacer le centre de gravité de l'outil dans une zone prédéterminée.The invention can thus reduce the size of the chamber, for example by reducing its length. This reduction in length can reduce the travel time required for the flame to cross the chamber longitudinally, thereby reducing the time of a firing cycle by the tool. The invention can further optimize the spatial distribution of the mass of the chamber inside the tool, for example to move the center of gravity of the tool in a predetermined area.
La chambre selon l'invention peut comprendre une ou plusieurs des caractéristiques suivantes, prises isolément les unes des autres ou en combinaison les unes avec les autres :
- le ratio S2/S1 est par exemple compris entre 1,1 et 3,0 voire plus ; dans un cas particulier, il peut être compris entre 1,1 et 1,5, et de préférence entre 1,2 et 1,5,
- ladite cavité a en section longitudinale une forme générale en L ou T,
- ladite cavité a au moins en partie une forme sphérique ou ovoïde,
- ledit carter définit trois ouvertures dont deux sont alignées sur un même axe U et une troisième est alignée sur un axe Y sensiblement perpendiculaire à l'axe U,
- ledit carter comprend une première demi-coque comportant une première paroi en portion de sphère,
- ladite première paroi est une paroi médiane qui est située entre deux parois d'extrémité chacune en portion de cylindre,
- lesdites parois d'extrémité définissent en partie lesdites ouvertures d'axe U,
- ledit carter comprend une seconde demi-coque comportant deux parois d'extrémité chacune en portion de cylindre et définissant en partie lesdites ouvertures d'axe U, et une paroi cylindrique définissant ladite ouverture d'axe Y,
- lesdites chambres comportent un carter définissant un logement dans lequel est monté et peut coulisser un piston pour l'entraînement d'un élément de fixation, ledit piston étant configuré pour être déplacé en translation dans ledit logement depuis une position de repos jusqu'à une position de travail, ledit logement étant en communication fluidique avec ladite second cavité.
- the ratio S2 / S1 is for example between 1.1 and 3.0 or more; in a particular case, it may be between 1.1 and 1.5, and preferably between 1.2 and 1.5,
- said cavity has in longitudinal section a general shape in L or T,
- said cavity has at least partly a spherical or ovoid shape,
- said housing defines three openings, two of which are aligned on the same axis U and a third is aligned on a Y axis substantially perpendicular to the axis U,
- said casing comprises a first half-shell comprising a first wall in a portion of a sphere,
- said first wall is a median wall which is located between two end walls each in a portion of a cylinder,
- said end walls partially define said U-axis apertures,
- said housing comprises a second half-shell comprising two end walls each in cylinder portion and partially defining said U-axis apertures, and a cylindrical wall defining said Y-axis aperture,
- said chambers comprise a housing defining a housing in which is mounted and slidable a piston for driving a fixing element, said piston being configured to be displaced in translation in said housing from a rest position to a position said housing being in fluid communication with said second cavity.
La présente invention concerne encore un outil de fixation à gaz, comportant une chambre ou plusieurs chambres telles que décrites ci-dessus, et/ou un dispositif tel que défini ci-dessus.The present invention also relates to a gas fastening tool, comprising a chamber or several chambers as described above, and / or a device as defined above.
L'invention sera mieux comprise et d'autres détails, caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description qui suit, faite à titre d'exemple non limitatif et en référence aux dessins annexés, dans lesquels :
- la
figure 1 est une vue schématique d'un outil de fixation à gaz selon l'invention, - la
figure 2 est une vue schématique d'un dispositif d'injection d'un gaz combustible, - la
figure 3 est une vue schématique en perspective du dispositif de lafigure 2 , - les
figures 4a et 4b sont des vues schématiques correspondant à lafigure 2 et montrant respectivement deux positions d'un organe d'actionnement du dispositif, - la
figure 5 est une vue schématique en coupe axiale de chambres d'un outil de fixation à gaz selon l'art antérieur, - les
figures 6 à 8 sont des vues schématiques en coupe axiale de chambres d'un outil de fixation à gaz, lesfigures 6 et7 illustrant l'invention, - les
figures 9a à 9c sont des vues schématiques en perspective et/ou en coupe axiale d'une chambre de combustion, - les
figures 10a à 10e sont des vues schématiques en coupe axiale d'une chambre de travail.
- the
figure 1 is a schematic view of a gas fastening tool according to the invention, - the
figure 2 is a schematic view of a device for injecting a combustible gas, - the
figure 3 is a schematic perspective view of the device of thefigure 2 , - the
Figures 4a and 4b are schematic views corresponding to thefigure 2 and showing respectively two positions of an actuating member of the device, - the
figure 5 is a schematic view in axial section of chambers of a gas fastening tool according to the prior art, - the
Figures 6 to 8 are schematic views in axial section of chambers of a gas fixation tool, thefigures 6 and7 illustrating the invention, - the
Figures 9a to 9c are schematic views in perspective and / or in axial section of a combustion chamber, - the
Figures 10a to 10e are schematic views in axial section of a working chamber.
L'outil 10 représenté sur la
Le boîtier de l'outil possède un axe 20, le long duquel se déplacent le piston d'entraînement et, dans le guide-pointe 18, les éléments de fixation.The tool housing has an
L'outil comporte une poignée 22 de préhension et de manipulation de l'outil. Elle s'étend, depuis le boîtier et à l'extérieur de celui-ci, sensiblement perpendiculairement à l'axe 20, légèrement incliné sur lui selon l'application de l'outil et l'ergonomie lors de son utilisation. La poignée 22 sert également au tir, par une détente d'actionnement 24 montée sur elle, dans la zone 26 de son raccordement au boîtier 12.The tool comprises a handle 22 for gripping and handling the tool. It extends, from the housing and outside thereof, substantially perpendicular to the
L'alimentation en combustible de la chambre de combustion du moteur 14 s'effectue, par l'intermédiaire d'un dispositif d'injection 28 à partir d'une cartouche 30 de gaz combustible.The fuel supply to the combustion chamber of the
Avantageusement, le dispositif d'injection 28 et la cartouche 30 sont logés dans un bras 32 relié au boîtier 12, qui s'étend sensiblement perpendiculairement à l'axe 20, en avant de la poignée 22, et dans lequel est prévu également le magasin 16.Advantageously, the
Un autre bras 34 s'étend sensiblement parallèlement à l'axe 20, entre la poignée 22 et le bras 32, de façon à former un pont entre les deux, du côté (inférieur) opposé au boîtier 12.Another
On va maintenant décrire différentes caractéristiques qui peuvent être intégrées, indépendamment les uns des autres ou en combinaison les uns avec les autres, dans l'outil 10 de la
Des caractéristiques sont illustrées par la
Le combustible est à l'état liquide dans la cartouche et doit être évaporé, le gaz combustible étant destiné à être mélangé à de l'air avant d'être brulé dans la chambre de combustion du moteur thermique.The fuel is in the liquid state in the cartridge and must be evaporated, the fuel gas being intended to be mixed with air before being burned in the combustion chamber of the engine.
Un dispositif d'injection d'un outil de fixation à gaz doit ainsi permettre l'évaporation du combustible.An injection device of a gas fixation tool must thus allow the evaporation of the fuel.
Le document
Cette technologie est complexe et relativement encombrante du fait notamment de la forme particulière de l'élément évaporateur. Cette technologie est également relativement coûteuse.This technology is complex and relatively bulky, in particular because of the particular shape of the evaporator element. This technology is also relatively expensive.
De plus, cet élément évaporateur est relativement fragile et a une faible tenue aux vibrations et aux chocs générés pendant le fonctionnement d'un outil de fixation. En outre, comme le combustible utilisé pour faire fonctionner ces outils peut contenir des lubrifiants, des additifs, voire même des impuretés, l'élément évaporateur peut se boucher bloquant ainsi le passage du combustible à travers lui. Le résultat de cette situation est le défaut de fonctionnement de l'outil, ce qui nécessite le démontage et le nettoyage de l'élément évaporateur et éventuellement son remplacement car l'opération de nettoyage peut endommager cet élément.In addition, this evaporator element is relatively fragile and has a low resistance to vibrations and shocks generated during the operation of a fixing tool. In addition, since the fuel used to operate these tools may contain lubricants, additives, or even impurities, the evaporator element can get clogged thereby blocking the passage of fuel through it. The result of this situation is the malfunction of the tool, which requires disassembly and cleaning of the evaporator element and possibly its replacement because the cleaning operation can damage this element.
Tous les problèmes mentionnés ci-dessus peuvent être résolus par le dispositif. Tout en essayant de gérer le colmatage de l'élément évaporateur, on propose un élément filtrant ayant notamment pour but de piéger les différents matériaux contenus dans le combustible sortant de la cartouche.All the above mentioned problems can be solved by the device. While attempting to manage the clogging of the evaporator element, there is provided a filter element having in particular the purpose of trapping the various materials contained in the fuel leaving the cartridge.
Différents filtres ont été testés. Les filtres sont constitués essentiellement d'un écran, d'un treillis, d'une grille, d'une toile, d'un tissu, d'une mousse, ou de fibres. Ces filtres sont réalisés en métal ou en plastique, ou à partir de fibres minérales ou naturelles. Le but de ces filtres est de piéger les particules contenues dans le combustible tout en permettant au combustible de circuler à travers le filtre.Different filters have been tested. The filters consist essentially of a screen, a lattice, a grid, a fabric, a fabric, a foam, or fibers. These filters are made of metal or plastic, or from mineral or natural fibers. The purpose of these filters is to trap the particles contained in the fuel while allowing the fuel to flow through the filter.
Dans le but de simplifier le dispositif d'injection de la technique antérieure, l'élément évaporateur est supprimé. De manière surprenante, l'utilisation d'un filtre disposé dans le dispositif d'injection simplifié, combiné à une cavité d'évaporation, permet de vaporiser de manière optimale le combustible en vue de l'alimentation de la chambre de combustion de l'outil.In order to simplify the prior art injection device, the evaporator element is removed. Surprisingly, the use of a filter arranged in the simplified injection device, combined with an evaporation cavity, makes it possible to optimally vaporize the fuel for the purpose of feeding the combustion chamber of the combustion chamber. tool.
La
Une vanne 40 destinée à calibrer une quantité de combustible liquide est interposée entre la cartouche 30 de combustible liquide et le bloc évaporateur simplifié 42. Un filtre 44 est disposé dans un logement ou alésage 46 prévu dans le bloc 42. Une quantité prédéterminée de combustible liquide est déchargée à partir de la cartouche 30 par l'intermédiaire de la vanne 40 dans le bloc 42, passant à travers le filtre 44, et arrive dans la cavité d'évaporation 47. Le bloc 42 est réalisé en un matériau conducteur de chaleur, tel qu'en métal. Le combustible liquide circulant à travers le filtre 44 est au moins partiellement converti en combustible gazeux grâce à l'apport de chaleur du milieu ambiant, qui transmet des calories au bloc évaporateur 42.A
En aval du filtre 44 et de la cavité 47, le combustible au moins partiellement vaporisé continue de circuler dans le bloc 42, et absorbe de la chaleur additionnelle à partir de l'environnement. La partie aval du bloc 42 comprend une conduite d'évaporation 48, agissant comme un collecteur de distribution, vers la chambre de combustion 50 de l'outil de fixation.Downstream of the
Les paramètres de dimensionnement du dispositif 28, et en particulier de la cavité 47 et de la conduite 48, tels que la longueur, le diamètre, l'épaisseur, etc., sont conçus de telle sorte que le combustible est entièrement converti en gaz à la sortie d'un orifice de décharge aval 51 de la conduite 48. Pour aider à transférer la chaleur du milieu environnant, le bloc 42 et/ou la conduite 48 peuvent éventuellement comprendre une ou plusieurs ailettes 52 disposées au moins sur une de leurs surfaces.The sizing parameters of the
En sortant de l'orifice de décharge 51, le combustible gazeux peut être directement injecté dans la chambre de combustion 50. En option, le combustible gazeux sortant de l'orifice de décharge 51 peut alimenter une ou plusieurs buses 54 de sortie de combustible et d'alimentation de la chambre de combustion 50. Le gaz combustible peut en variante alimenter une pompe à jet 56 du type venturi, dans lequel de l'air ambiant est entraîné dans la pompe à jet 56, et mélangé au combustible gazeux injecté par la ou les buses 54, de manière à former un mélange air-combustible pour l'alimentation de la chambre de combustion 50.Leaving the
Ce bloc évaporateur 42 est donc plus facile à fabriquer et moins coûteux. Le filtre est plan et donc relativement simple. Il s'étend sensiblement dans un plan parallèle à l'axe Z de la cartouche 30. Il a par exemple une forme de pastille, disque ou bloc. Il est beaucoup plus simple et moins fragile que les pièces complexes utilisés dans l'art antérieur. Par conséquent, le bloc évaporateur simplifié est également plus facile à entretenir en cas de besoin, bien que la nécessité de maintenance d'un tel bloc est également réduite de manière significative.This
La
Comme on le voit à la
Le bloc évaporateur 42 comprend un alésage dans lequel est monté et peut coulisser, le long de l'axe longitudinal Z de la cartouche 30, un organe d'actionnement 58. Cet organe d'actionnement a une forme allongée rectiligne et comprend un alésage interne 60 en forme de T ou L. Cet alésage comprend une première portion axiale qui s'étend le long de l'organe 58 et débouche à l'extrémité inférieure de celui-ci, et une portion radiale qui s'étend entre l'extrémité supérieure de la portion axiale et la périphérie de l'organe. Le débouché de cette portion radiale est situé en regard du filtre 44.The
L'organe 58 est mobile entre deux positions : une position haute ou de repos représentée à la
L'extrémité inférieure de l'organe 58 est configurée pour coopérer par emboîtement avec un embout de connexion de la cartouche 30.The lower end of the
Le déplacement de l'organe 58, de sa position de repos à sa position de travail, provoque la libération d'une quantité calibrée de combustible de la cartouche 30. Ce combustible, sous forme liquide, circule dans l'alésage 60 de l'organe 58 et traverse le filtre 44, qui retient les éventuelles impuretés, avant de pénétrer dans la cavité 47 dans laquelle est initiée la transformation du combustible liquide en combustible gazeux. Le combustible circule dans la conduite 48 pour compléter son évaporation et arrive à l'état gazeux au niveau de la buse 54. Il est alors pulvérisé dans la pompe à jet 56 et mélangé à de l'air qui pénètre dans la pompe par effet venturi, le mélange air-combustible étant ensuite injecté dans la chambre 50 du moteur thermique.The displacement of the
Avantageusement, et comme représenté à la
Le filtre 44 a par exemple une perméabilité inférieure à 50 darcy et de préférence comprise entre 10 à 33 darcy, ce qui permet de filtrer des particules de diamètre compris entre 7µm et 14µm environ, avec une efficacité de 98 à 99,9%.The
Un moteur thermique d'un outil de fixation à gaz comprend une chambre de combustion et une chambre de travail dans lequel un piston d'entraînement d'un élément de fixation est apte à se déplacer sous l'effet de l'explosion du mélange air-combustible dans la chambre de combustion.A heat engine of a gas fastening tool comprises a combustion chamber and a working chamber in which a driving piston of a fastener is able to move under the effect of the explosion of the air mixture. -combustible in the combustion chamber.
Avantageusement, comme cela est représenté à la
Les chambres 60, 50 sont séparées l'une des l'autre par un clapet 66. La précombustion du mélange dans la chambre 60 provoque une augmentation de pression dans la cavité 64. Lorsque cette pression dépasse un certain seuil, le clapet s'ouvre et laisse passer le mélange combustible dans la chambre 50.The
La chambre 50 comprend un carter 68 définissant une cavité de combustion 70. Le mélange arrive dans la chambre 50 avec une pression relativement élevée. La flamme issue de la chambre 60 atteint la chambre 50, la combustion à pression élevée dans la chambre 50 permettant d'améliorer les performances de l'outil. La combustion 50 dans la chambre provoque une augmentation de pression dans la cavité 70, qui force le piston 78 à se déplacer dans la chambre de travail 80.The
Comme on peut le constater à la
La puissance de sortie de la chambre de combustion 50 peut être augmentée jusqu'à cinquante pour cent (50%) simplement par l'allongement de la chambre de précombustion 60.The output power of the
Dans le document
Il a également été indiqué dans le document
Par conséquent, la chambre de précombustion 60 de l'art antérieur présente un allongement relatif B qui est préjudiciable pour l'outil en termes d'encombrement.Therefore, the
Un autre inconvénient de cette chambre de précombustion 60 est que plus la chambre de précombustion est longue, plus le retard entre l'allumage de l'étincelle et l'allumage de la chambre de combustion 50 est important. Ceci peut augmenter la durée du cycle de tir de l'outil, ce qui est problématique pour certaines applications de fixation.Another disadvantage of this
Enfin, la conception de la chambre de précombustion 60 n'est pas optimale en termes d'ergonomie.Finally, the design of the
Les perfectionnements ci-dessous permettent d'optimiser l'encombrement de l'outil, d'optimiser son fonctionnement, et/ou de raccourcir la durée d'un cycle de tir et en particulier la durée entre l'allumage de la chambre de précombustion 60 et la combustion dans la chambre 50 tout en conservant de bonnes performances de la chambre de combustion.The improvements below make it possible to optimize the size of the tool, to optimize its operation, and / or to shorten the duration of a firing cycle and in particular the duration between the ignition of the pre-combustion chamber. 60 and combustion in the
Pour être en mesure de comparer l'effet de la nouvelle conception de chambre de précombustion vis-à-vis de l'art antérieur, les inventeurs ont maintenu constant le volume total des chambres 50, 60. Ainsi, les quantités totales de mélange air-combustible sont comparables, et par conséquent les mêmes quantités totales d'énergie brute sont disponibles.To be able to compare the effect of the new precombustion chamber design vis-à-vis the prior art, the inventors have kept the total volume of the
On appelle V1 le volume de la chambre de précombustion 60, et V2 le volume principal de la chambre de combustion 50. V1 + V2 est constant pour tous les essais. En outre, comme le but est d'améliorer les performances de la chambre de précombustion 60, on garde V1 le même pour tous les exemples de réalisation.The volume of the
On constate que, en gardant V1 constant, un effet intéressant a été atteint en changeant la configuration de la chambre de précombustion 60 à partir d'une forme allongée de section transversale constante à une forme allongée dont la section transversale varie le long de l'axe longitudinal de la chambre. Elle peut avoir une section transversale qui est étagée ou qui a une forme tronconique.It is found that, keeping V1 constant, an interesting effect has been achieved by changing the configuration of the
Cela signifie de préférence que la chambre de précombustion présente, à partir de la bougie d'allumage 65, dans la direction de la chambre de combustion 50, une section croissante. De préférence, la chambre de précombustion 60 comporte deux parties, la première partie comportant la bougie d'allumage 65 et présentant un premier diamètre intérieur maximal qui est plus petit que le diamètre intérieur minimum de la deuxième partie.This preferably means that the pre-combustion chamber has, from the
De préférence, au moins un diamètre, et de préférence les deux diamètres de la première et de la seconde partie sont constants. Selon un exemple de réalisation de l'invention, comme représenté sur la
La réduction de la longueur de la chambre de précombustion 60 permet de réduire la distance entre la bougie 65 et la chambre de combustion 50, ce qui a pour avantage de réduire le temps d'allumage de la chambre 50, ainsi que la durée globale d'un cycle de tir.The reduction of the length of the
L'invention fournit ainsi une chambre de précombustion efficace pour un outil qui est moins encombrant et peut fonctionner plus rapidement que ceux de l'art antérieur.The invention thus provides an effective precombustion chamber for a tool that is less bulky and can operate faster than those of the prior art.
La
Cette conception conduit à une meilleure ergonomie parce qu'il est plus bénéfique en termes d'équilibre de l'outil. Avec cette conception, la chambre de précombustion n'est plus située entièrement sur un côté de l'outil de telle sorte que la chambre de combustion et la chambre de travail 80 ne forment pas nécessairement une architecture classique en L, c'est-à-dire un outil assimilable à un « pistolet ».This design leads to better ergonomics because it is more beneficial in terms of tool balance. With this design, the pre-combustion chamber is no longer located entirely on one side of the tool so that the combustion chamber and the working
Ce nouveau design est plus pratique en termes d'ergonomie étant donné que les masses de la chambre de travail et du magasin comportant les éléments de fixation ne sont plus tous situés sur le même côté de l'outil et sur le même côté de la poignée de l'outil.This new design is more practical in terms of ergonomics since the masses of the working chamber and the magazine with the fixing elements are no longer all located on the same side of the tool and on the same side of the handle of the tool.
De préférence, la chambre de précombustion 60 comporte au moins deux parties, la première de ces parties est celle reliée à la chambre de combustion 50 et la seconde partie est celle la plus éloignée de la chambre de combustion 50. La paroi latérale 82 de la chambre de précombustion 60 dans la première partie est plus proche de l'extrémité arrière de l'outil, que ne l'est la paroi latérale de la chambre de précombustion dans la seconde partie. De préférence, la deuxième partie comprend la bougie d'allumage 65. L'outil est configuré de telle sorte que l'outil est serré autour de la chambre de précombustion.Preferably, the
De préférence, au moins un diamètre, et de préférence les deux diamètres de la première et de la seconde partie sont constants. Par exemple, comme représenté sur la
Comme on le voit sur la
Tout en gardant constante V1 par rapport à l'art antérieur, l'invention permet de garder un niveau de performances comparable, voire identique, en termes de production d'énergie, dans un outil qui est beaucoup mieux équilibré.While keeping constant V1 with respect to the prior art, the invention makes it possible to keep a level of performance comparable, or even identical, in terms of energy production, in a tool that is much better balanced.
Comme représenté sur la
Par conséquent, comme le carter de la chambre de travail 80 a toujours une forme cylindrique et le piston 78 a également une forme cylindrique, la chambre de combustion 50 a, du côté de la chambre de travail 80, une forme générale cylindrique.Therefore, since the housing of the working
Comme on le voit sur la
On constate que cette chambre 50 ne conduit pas à une sortie d'énergie optimale. Ils ont trouvé une forme améliorée pour la chambre de combustion qui permet d'améliorer la production d'énergie.It can be seen that this
Un exemple de réalisation préféré est présenté à la
Cette forme sphérique/ovoïde conduit à un meilleure mélange, et à une distribution de combustible et à un balayage des gaz de combustion corrects. On a en effet découvert que cette forme ne dispose pas de zones mortes en raison de la présence de bords dans la cavité. Ces bords affectent à la fois le flux et la flamme de combustion. Le débit a tendance à s'arrêter à l'approche des bords, résultant dans des zones mortes. La flamme est également affectée par ces bords car elle tend à s'éteindre en se rapprochant des bords. La nouvelle forme supprime la plupart, sinon tous les points morts néfastes qui existent dans l'art antérieur. Même si le volume de combustion n'est pas une sphère parfaite, tout bord qui peut être retiré à partir du volume de la chambre de combustion permet d'optimiser l'entrée et la sortie des flux de la chambre pour l'alimentation optimale avec le mélange air-combustible et le balayage optimal des gaz de combustion.This spherical / ovoid shape leads to better mixing, and proper fuel distribution and flue gas scavenging. It has been discovered that this form does not have dead zones because of the presence of edges in the cavity. These edges affect both the flow and the combustion flame. The flow tends to stop as the edges approach, resulting in dead zones. The flame is also affected by these edges because it tends to go out when approaching the edges. The new form removes most, if not all, of the damaging dead spots that exist in the prior art. Even if the combustion volume is not a perfect sphere, any edge that can be removed from the volume of the combustion chamber optimizes the inlet and outlet flows of the chamber for optimal feeding with the air-fuel mixture and the optimal flushing of the combustion gases.
De plus, le mélange peut brûler beaucoup plus efficacement dans n'importe quelle zone de la chambre de combustion, en minimisant les zones mortes. Comme la principale raison de cette amélioration est l'élimination des bords et angles morts, une forme partiellement sphérique peut également être remplacé par une forme partiellement ovoïde ou toute autre forme qui n'a pas ou a un nombre minime de bords, par exemple une forme où le rayon de courbure de la partie supérieure de la paroi de fond (ici à gauche) de la chambre de combustion 50 est supérieur ou égal à 25%, de préférence 50% au plus petit diamètre de la chambre de combustion de la technique antérieure (par exemple, H).In addition, the mixture can burn much more efficiently in any area of the combustion chamber, minimizing dead zones. As the main reason for this improvement is the elimination of edges and blind spots, a partially spherical shape can also be replaced by a partially ovoid shape or any other shape that does not have or has a minimal number of edges, for example a where the radius of curvature of the upper part of the bottom wall (here on the left) of the
Les
La chambre de combustion 50 comprend un carter 68 définissant trois ouvertures dont deux 50a, 50b sont alignées sur un même axe U, qui correspond à l'axe longitudinal de la chambre de précombustion ou une partie de celle-ci, et une troisième 50c est alignée sur un axe Y sensiblement perpendiculaire à l'axe U.The
Le carter 68 comprend une première demi-coque 68a comportant une première paroi 68aa en portion de sphère. Cette première paroi 68aa est une paroi médiane qui est située entre deux parois d'extrémité 68ab chacune en portion de cylindre. Les parois d'extrémité 68ab définissent en partie les ouvertures 50a, 50b d'axe U. Le carter 68 comprend une seconde demi-coque 68b comportant deux parois d'extrémité 68bb chacune en portion de cylindre et définissant le reste des ouvertures d'axe U, et une paroi cylindrique 68ba définissant l'ouverture d'axe Y.The
L'ouverture 50a assure la communication fluidique avec la cavité de la chambre de précombustion. L'ouverture 50c assure la communication fluidique avec la cavité interne de la chambre de travail, et l'ouverture 50b assure la communication fluidique avec l'atmosphère. L'ouverture 50a est obturable par le clapet 66 précité et l'ouverture 50b est obturable par une vanne 84, dont le corps mobile est porté par une tige portant également le clapet 66.The
Les performances d'un outil de fixation actionné par combustion sont notamment basées sur la capacité du piston de convertir efficacement l'énergie de pression générée par la combustion du mélange explosif en énergie cinétique transférée à l'élément de fixation. Cette conversion efficace est affectée par les fuites qui se produisent entre le piston et le carter de la chambre de travail. Ces pistons et les carters sont très bien connus car ils sont utilisés dans tous les outils. La conception de la chambre de combustion et la technologie de combustion peut varier d'un outil à l'autre, mais le piston en mouvement réciproque dans le carter demeure essentiellement la même pour les différents outils de fixation.The performance of a combustion-powered fastener tool is based in particular on the ability of the piston to effectively convert the pressure energy generated by the combustion of the explosive mixture into kinetic energy transferred to the fastener. This efficient conversion is affected by leaks that occur between the piston and the housing of the working chamber. These pistons and housings are very well known because they are used in all tools. The combustion chamber design and combustion technology may vary from tool to tool, but the reciprocating piston in the crankcase will remain essentially the same for the different fasteners.
Ceci est bien connu par l'homme de l'art, comme expliqué dans le document
Le piston utilisé dans un tel outil comprend classiquement des moyens d'étanchéité dynamique, c'est-à-dire des moyens utilisés pour assurer une étanchéité entre le piston et le carter de la chambre de travail pendant la course de déplacement du piston. Cette course résulte d'une différence de pression entre les deux côtés du piston (combustion pour l'entraînement et le vide pour le retour). Les joints selon l'art antérieur sont configurés pour assurer une étanchéité dynamique.The piston used in such a tool conventionally comprises dynamic sealing means, that is to say means used to ensure a seal between the piston and the housing of the working chamber during the displacement stroke of the piston. This stroke results from a pressure difference between the two sides of the piston (combustion for driving and vacuum for return). The seals according to the prior art are configured to provide a dynamic seal.
La présence d'une chambre de précombustion permet d'augmenter l'efficacité de la combustion et la pression à l'intérieur de l'outil.The presence of a pre-combustion chamber increases the efficiency of combustion and the pressure inside the tool.
Dans sa position initiale rétractée, le piston doit d'abord être maintenu étanche pour contenir la pression générée par la combustion du mélange air-combustible. Comme mentionné ci-dessus, chaque fois que le mélange est suralimenté, ou lorsque la technologie de combustion utilise une chambre de précombustion, la pré-pression résultante générée par la chambre de précombustion, avant l'allumage de la chambre de combustion, doit rester étanche et maintenir la chambre de combustion sans fuite. Pendant cette phase préliminaire, le piston doit par conséquent être étanche autant que possible. Idéalement, le piston doit également rester stable pour maintenir le volume de la chambre de combustion faible afin de maximiser la pression jusqu'à ce que la combustion soit presque terminée. Idéalement aussi, à cette phase préliminaire, le piston doit être maintenu jusqu'à ce qu'à ce qu'un pic de pression se produise et la combustion se termine. Cette exigence de maintenir le piston à une phase préliminaire a été abordé dans l'art antérieur en utilisant des aimants ou des mécanismes, notamment des billes, des ressorts et/ou des cames. Tous ces mécanismes de rétention de piston sont en général encombrants, complexes et coûteux.In its initial retracted position, the piston must first be kept sealed to contain the pressure generated by the combustion of the air-fuel mixture. As mentioned above, whenever the mixture is supercharged, or when the combustion technology uses a pre-combustion chamber, the resulting pre-pressure generated by the pre-combustion chamber, prior to ignition of the combustion chamber, must remain tight and maintain the combustion chamber without leakage. During this preliminary phase, the piston must therefore be watertight as much as possible. Ideally, the piston should also remain stable to keep the volume of the firebox low to maximize pressure until combustion is almost complete. Ideally also, in this preliminary phase, the piston should be maintained until a peak pressure occurs and combustion ends. This requirement to maintain the piston at a preliminary stage has been addressed in the prior art by using magnets or mechanisms, in particular balls, springs and / or cams. All of these piston retention mechanisms are generally bulky, complex and expensive.
Par conséquent, à cette phase préliminaire, l'exigence est d'assurer une étanchéité maximale entre le piston et le carter de la chambre de travail et donc d'avoir une étanchéité statique maximale lorsque le piston est en position de repos.Therefore, in this preliminary phase, the requirement is to ensure maximum sealing between the piston and the housing of the working chamber and therefore to have a maximum static seal when the piston is in the rest position.
Idéalement, le piston doit être maintenu dans cette position, de manière étanche, jusqu'à ce que soit atteint le pic de pression afin de maximiser le transfert de l'énergie sous forme de pression de combustion à l'énergie cinétique d'entraînement du piston.Ideally, the piston should be held in this position, in a sealed manner, until the pressure peak is reached to maximize the transfer of energy in the form of combustion pressure to the driving kinetic energy of the fuel. piston.
La libération du piston est la deuxième étape de l'opération, alors que le piston accélère le long de sa course jusqu'à ce qu'il atteigne sa position de travail opposée et entraîne l'élément de fixation dans le matériau support. Au cours de cette deuxième étape, l'exigence d'étanchéité entre le piston et le carter est moins problématique. Les moyens d'étanchéité dynamique sont fortement sollicités par l'accélération du piston et leur friction avec le carter, mais permettent de répondre au besoin de manière satisfaisante.Release of the piston is the second step of the operation, as the piston accelerates along its stroke until it reaches its opposite working position and drives the fastener into the support material. During this second step, the sealing requirement between the piston and the housing is less problematic. The dynamic sealing means are strongly stressed by the acceleration of the piston and their friction with the housing, but can meet the need satisfactorily.
Il existe donc un compromis sur les moyens d'étanchéité entre la première phase exigeant des performances d'étanchéité statique, et la seconde phase exigeant des performances d'étanchéité dynamique.There is therefore a compromise on the sealing means between the first phase requiring static sealing performance, and the second phase requiring dynamic sealing performance.
L'homme de l'art considère en général que des joints statiques sont généralement des joints souples (joints toriques, etc.) fait de matériaux souples comme le caoutchouc, la silicone, etc. Ceux-ci sont efficaces lorsqu'il n'y a pas de mouvement relatif entre les parties ou si les mouvements sont limités et lents. Le même homme de l'art sait que les joints dynamiques sont plus capables d'assurer une étanchéité entre deux parties en mouvement, même si l'étanchéité en tant que telle n'est pas aussi bonne qu'avec un joint statique.Those skilled in the art generally consider that static seals are generally flexible seals (O-rings, etc.) made of flexible materials such as rubber, silicone, etc. These are effective when there is no relative movement between the parts or if the movements are limited and slow. The same skilled person knows that dynamic seals are more capable of sealing between two moving parts, even though the seal as such is not as good as with a gasket.
Pour les moteurs à combustion interne, les joints dynamiques pour pistons peuvent être des segments métalliques tels qu'en acier, qui fonctionnent efficacement à haute vitesse et à haute température. D'autres joints dynamiques existent également, tels que des joints à lèvres, ou des joints composites, par exemple, même s'ils ne sont généralement pas aussi efficaces que des anneaux en acier du fait des hautes températures dans les moteurs à combustion.For internal combustion engines, dynamic piston seals can be metal segments such as steel, which operate efficiently at high speeds and at high temperatures. other Dynamic seals also exist, such as lip seals, or composite seals, for example, although they are generally not as efficient as steel rings because of the high temperatures in the combustion engines.
Cela confirme le compromis mentionné ci-dessus entre étanchéité statique requise à la première phase de l'opération de l'outil, et étanchéité dynamique requise à la deuxième phase. Ce compromis est encore justifié par la structure particulière des outils de fixation qui présentent un ou plusieurs orifices d'échappement situés à l'intérieur du carter de la chambre de travail, entre les deux positions extrêmes de la course du piston. Ces orifices d'échappement sont tenus d'évacuer les gaz brûlés. Malheureusement, lorsque le piston passe au droit de ces orifices d'échappement, les moyens d'étanchéité dynamique sont fortement compressés et ont tendance à se dilater dans l'orifice d'échappement ouvert. Cette situation est relativement bien supportée par les joints en acier, mais pas par les joints d'étanchéité souples. Les joints souples ont donc tendance à s'user rapidement s'ils sont exposés à des passages répétés au niveau des orifices d'échappement car ils ont tendance à s'extruder dans les orifices d'échappement.This confirms the compromise mentioned above between static sealing required at the first phase of tool operation, and dynamic sealing required at the second phase. This compromise is further justified by the particular structure of the fastening tools which have one or more exhaust ports located inside the casing of the working chamber, between the two extreme positions of the piston stroke. These exhaust ports are required to evacuate the flue gases. Unfortunately, when the piston passes right of these exhaust ports, the dynamic sealing means are highly compressed and tend to expand in the open exhaust port. This situation is relatively well supported by steel joints, but not by flexible seals. Flexible seals therefore tend to wear out quickly if they are exposed to repeated passages at the exhaust ports as they tend to extrude into the exhaust ports.
On a cherché à assurer une meilleure étanchéité entre le piston et son carter, lorsque le piston est dans sa position de repos, cette étanchéité n'étant pas altérée du fait du passage du piston au niveau des orifices d'échappement. Idéalement, ces moyens d'étanchéité améliorés devraient maintenir le piston dans sa position de repos jusqu'à ce que la pression des gaz de combustion dans la chambre atteigne un certain seuil.It has been sought to ensure a better seal between the piston and its housing, when the piston is in its rest position, this sealing is not impaired due to the passage of the piston at the exhaust ports. Ideally, these improved sealing means should maintain the piston in its rest position until the pressure of the combustion gases in the chamber reaches a certain threshold.
La chambre de travail comprend un carter par exemple cylindrique, un piston et un premier joint d'étanchéité pour rendre étanche le piston dans la position rétractée ou de repos du piston (joint statique), et un second joint d'étanchéité - qui est différent du premier joint d'étanchéité - pour rendre étanche le piston pendant son mouvement (joint dynamique).The working chamber comprises a cylindrical housing for example, a piston and a first seal to seal the piston in the retracted position or rest position of the piston (static seal), and a second seal - which is different the first seal - to seal the piston during its movement (dynamic seal).
En utilisant deux joints d'étanchéité différents, chaque joint d'étanchéité peut être adapté de façon optimale à la fonction d'étanchéité nécessaire et aucun compromis doit être trouvé entre une étanchéité dynamique et statique.By using two different seals, each seal can be optimally matched to the required sealing function and no compromise has to be found between dynamic and static sealing.
De préférence, le second joint d'étanchéité est fixé sur le piston (par exemple, logé dans une rainure du piston). De préférence, le premier joint et le deuxième joint d'étanchéité sont tous deux fixés sur le piston et le carter a une surface d'étanchéité pour le premier joint d'étanchéité qui est radialement à l'intérieur de la surface d'étanchéité pour le second joint d'étanchéité. Par exemple, le carter comporte donc une saillie radiale vers l'intérieur de la surface cylindrique intérieure opposée au premier joint d'étanchéité avant/pendant la position de repos. Plus préférablement, le premier joint d'étanchéité est fixé sur le carter (par exemple, logé à l'intérieur d'une rainure du carter). De préférence, dans ce cas, aucune saillie radialement vers l'intérieur, qui tient le joint ou servant de surface d'étanchéité radiale (par exemple en forme de surface latérale cylindrique), est présente.Preferably, the second seal is attached to the piston (for example, housed in a groove of the piston). Preferably, the first seal and the second seal are both attached to the piston and the housing has a sealing surface for the first seal which is radially inside the sealing surface for sealing. the second seal. For example, the casing thus has a radial projection inwardly of the inner cylindrical surface opposite to the first seal before / during the rest position. More preferably, the first seal is attached to the housing (eg, housed within a groove of the housing). Preferably, in this case, no radially inward protrusion which holds the seal or serves as a radial sealing surface (for example in the form of a cylindrical lateral surface) is present.
Tout en essayant de résoudre les problèmes et les compromis énumérés ci-dessus, on a réalisé plusieurs exemples de réalisation qui sont illustrés dans les
Tous les exemples de réalisation montrent une chambre de travail 80 comportant un carter 90 à l'intérieur duquel est monté coulissant un piston 78, la cavité interne 92 de la chambre de travail communiquant avec la cavité interne d'une chambre de combustion telle que celle décrite dans ce qui précède.All the exemplary embodiments show a working
Le piston 78 est représenté dans sa position rétractée ou de repos, comme cela est connu dans la technique et a déjà été expliqué ci-dessus, et se déplace (vers le bas par rapport à l'orientation des figures) dans le carter 90 pour entraîner un élément de fixation. Pendant sa course, le piston peut éventuellement passer au droit d'un orifice d'échappement 94.The
La
Chaque joint fournit ses performances notamment comme décrit ci-dessus. Le piston est conçu de sorte que les surfaces d'étanchéité pour les joints d'étanchéité soient différentes. Dans cet exemple, le diamètre de la surface d'étanchéité du joint d'étanchéité statique 96 est plus petit que le diamètre de la surface d'étanchéité du joint dynamique 98. Lorsque le piston se déplace vers le bas, le joint dynamique reste en contact avec sa surface d'étanchéité pendant toute la course. Comme le joint dynamique est en mesure de résister à des passages répétés au niveau de l'orifice d'échappement 94, il n'y a pas de problème de tenue pour ce joint. Dans le même temps, tandis que se déplace le piston (vers le bas) le long de sa course, le joint statique 96 assure l'étanchéité au début de la course, jusqu'à ce qu'il se dégage de sa surface de plus petit diamètre d'étanchéité prévu dans le carter 90. Par conséquent, alors que le piston continue sa course, le joint statique n'est plus en contact avec sa surface, ni avec aucune autre surface du carter.Each joint provides its performance especially as described above. The piston is designed so that the sealing surfaces for the seals are different. In this example, the diameter of the sealing surface of the
En particulier, grâce à cette conception, le joint statique 96 est jamais en contact avec l'orifice d'échappement 94 et donc peu sollicité par frottement. Le joint statique assure par conséquent une étanchéité que pendant la première phase de l'opération. Cette situation permet d'utiliser le plus efficacement possible le joint d'étanchéité statique sans exiger de compromis du fait que celui-ci n'est pas exposé à des sollicitations dynamiques.In particular, thanks to this design, the
Le joint statique peut être réalisé en matériau souple, tel qu'en caoutchouc, car il ne sera jamais en contact avec l'orifice d'échappement 94 et ne subira donc pas de dommage par frottement. En outre, le joint d'étanchéité statique peut être ajusté serré de sorte que l'étanchéité soit optimisée. L'autre avantage de cet ajustement serré est que le joint statique participe au maintien du piston dans sa position de repos. Ainsi, le joint d'étanchéité statique agit également comme un mécanisme de retenue du piston selon les besoins de performances de combustion optimale.The gasket may be made of flexible material, such as rubber, because it will never be in contact with the
En se référant maintenant à la
La
Les
Dans les différents exemples de réalisation, le piston 78 a une forme allongée et comprend une tête et une tige coaxiales. Le joint d'étanchéité statique 96 est situé dans une zone de la tête de piston, proche d'une extrémité longitudinale de celle-ci, qui est opposée à la tige.In the various exemplary embodiments, the
Claims (10)
- Combustion or precombustion chambers (60) for a gas-powered fixing tool (10), comprising a casing (62,68) defining a first combustion cavity (64) having a generally elongate form of longitudinal axis X, and a second combustion cavity (70), ignition means, such as a spark plug (65), being situated at a longitudinal end of said cavity and a longitudinal end of said first cavity, which is opposite said ignition means, being fluidically connected with said second cavity, characterized in that said first cavity has a variable cross section along said axis X, said first cavity having a generally staged form and comprising at least one first portion of cross section S1 and one second portion of cross section S2, with S1 smaller than S2, said ignition means being situated in said first portion.
- Chambers (60) according to the preceding claim, in which said first cavity has, in longitudinal section, a generally L or T-shaped form.
- Chambers according to one of the preceding claims, in which said second cavity has at least partly a spherical or ovoid form.
- Chambers (50) according to the preceding claim, in which said casing defines three openings (50a, 50b, 50c), two of which are aligned on a same axis U and a third of which is aligned on an axis Y substantially at right angles to the axis U.
- Chambers (50) according to Claim 3 or 4, in which said casing comprises a first half-shell (68a) comprising a first wall (68aa) in the form of a portion of sphere.
- Chambers (60) according to the preceding claim, in which said first wall (68a) is a median wall (68aa) which is situated between two end walls (68ab) each in the form of a portion of cylinder.
- Chambers (60) according to Claims 5 and 6, dependent on Claim 4, in which said end walls (68ab) partly define said openings of axis U.
- Chambers (60) according to the preceding claim, in which said casing comprises a second half-shell (68b) comprising two end walls (68bb) each in the form of a portion of cylinder and partly defining said openings of axis U, and a cylindrical wall (68ba) defining said opening of axis Y.
- Chambers according to one of the preceding claims, in which they comprise a casing (90) defining a housing in which a piston (78) is mounted and can slide to drive a fixing element, said piston being configured to be translationally displaced in said housing from a rest position to a working position, said housing being fluidically connected with said second cavity.
- Gas-powered fixing tool, comprising chambers (50, 60) according to one of the preceding claims.
Priority Applications (18)
Application Number | Priority Date | Filing Date | Title |
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EP17157755.4A EP3189938B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP15200997.3A EP3067158B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157754.7A EP3189937B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157756.2A EP3189939B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
NZ744543A NZ744543A (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
CA3031271A CA3031271C (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
US15/553,112 US11065750B2 (en) | 2015-03-10 | 2016-02-29 | For a gas-powered fixing tool |
PCT/US2016/020000 WO2016144580A1 (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
CA3031272A CA3031272C (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
CA2976366A CA2976366C (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
NZ734353A NZ734353A (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
AU2016229422A AU2016229422B2 (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
NZ744536A NZ744536A (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
CA3031269A CA3031269C (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
NZ744542A NZ744542A (en) | 2015-03-10 | 2016-02-29 | Improvements for a gas-powered fixing tool |
AU2018207324A AU2018207324C1 (en) | 2015-03-10 | 2018-07-23 | Improvements for a gas-powered fixing tool |
AU2018207329A AU2018207329B2 (en) | 2015-03-10 | 2018-07-23 | Improvements for a gas-powered fixing tool |
AU2018207327A AU2018207327B2 (en) | 2015-03-10 | 2018-07-23 | Improvements for a gas-powered fixing tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP15158537 | 2015-03-10 | ||
EP15200997.3A EP3067158B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
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Application Number | Title | Priority Date | Filing Date |
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EP17157754.7A Division EP3189937B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157754.7A Division-Into EP3189937B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157755.4A Division EP3189938B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157755.4A Division-Into EP3189938B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157756.2A Division EP3189939B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157756.2A Division-Into EP3189939B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
Publications (2)
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EP3067158A1 EP3067158A1 (en) | 2016-09-14 |
EP3067158B1 true EP3067158B1 (en) | 2018-09-12 |
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Application Number | Title | Priority Date | Filing Date |
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EP17157755.4A Active EP3189938B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP15200997.3A Active EP3067158B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157754.7A Active EP3189937B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157756.2A Active EP3189939B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
Family Applications Before (1)
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EP17157755.4A Active EP3189938B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
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Application Number | Title | Priority Date | Filing Date |
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EP17157754.7A Active EP3189937B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
EP17157756.2A Active EP3189939B1 (en) | 2015-03-10 | 2015-12-18 | Improvements to a gas-powered fastening tool |
Country Status (6)
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US (1) | US11065750B2 (en) |
EP (4) | EP3189938B1 (en) |
AU (4) | AU2016229422B2 (en) |
CA (4) | CA3031269C (en) |
NZ (4) | NZ734353A (en) |
WO (1) | WO2016144580A1 (en) |
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US10759031B2 (en) * | 2014-08-28 | 2020-09-01 | Power Tech Staple and Nail, Inc. | Support for elastomeric disc valve in combustion driven fastener hand tool |
US11179837B2 (en) | 2017-12-01 | 2021-11-23 | Illinois Tool Works Inc. | Fastener-driving tool with multiple combustion chambers and usable with fuel canisters of varying lengths |
US11241777B2 (en) * | 2017-12-05 | 2022-02-08 | Illinois Tool Works Inc. | Powered fastener driving tools and clean lubricants therefor |
FR3086569B1 (en) | 2018-10-01 | 2020-12-18 | Illinois Tool Works | GAS FIXING TOOL AND ITS OPERATING PROCEDURE |
CN111015598B (en) * | 2019-12-31 | 2021-06-08 | 张豪 | Working medium circulation structure of nail gun and nail gun |
EP3954504B1 (en) | 2020-08-11 | 2024-01-17 | Illinois Tool Works, Inc. | Fastener driving tool |
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FR2852546B1 (en) * | 2003-03-19 | 2006-08-11 | Prospection & Inventions | METHODS FOR ADJUSTING THE POWER OF A GAS-OPERATING APPARATUS |
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2015
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- 2015-12-18 EP EP15200997.3A patent/EP3067158B1/en active Active
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AU2018207327A1 (en) | 2018-08-09 |
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AU2016229422B2 (en) | 2018-09-13 |
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AU2018207329B2 (en) | 2020-03-26 |
EP3189939A1 (en) | 2017-07-12 |
AU2018207324C1 (en) | 2020-05-07 |
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EP3189938B1 (en) | 2020-03-11 |
AU2018207327B2 (en) | 2020-03-26 |
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CA3031271C (en) | 2021-01-12 |
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EP3189937A1 (en) | 2017-07-12 |
NZ744536A (en) | 2020-06-26 |
CA2976366C (en) | 2019-08-27 |
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