EP0076520A1 - Luftgewehr - Google Patents
Luftgewehr Download PDFInfo
- Publication number
- EP0076520A1 EP0076520A1 EP82109226A EP82109226A EP0076520A1 EP 0076520 A1 EP0076520 A1 EP 0076520A1 EP 82109226 A EP82109226 A EP 82109226A EP 82109226 A EP82109226 A EP 82109226A EP 0076520 A1 EP0076520 A1 EP 0076520A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- air
- piston
- main
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
- F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
- F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
- F41B11/68—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas the gas being pre-compressed before firing
Definitions
- This Patent for Invention relates to certain improvements made to air rifles and, more particularly, to the air compression piston system in the chamber intended for its storage before the time of shooting.
- the air rifle has found multiple applications in the field of sports and toys.
- the principle consists essentially in applying an impulse to a small bullet along the barrel; this bullet is projected by a mass of air previously compressed, which, during the expansion, comes into contact with the zone in which the bullet is located, in the muzzle of the barrel, so that the potential energy of l compressed air can act on said bullet by pushing it along the barrel; the potential energy of the compressed air is then transformed into kinetic energy, that of the bullet at the exit of the barrel, so that according to the amplitude of this kinetic energy, one obtains a more or less great range of the shooting.
- the improvements which are the subject of this patent essentially consist in obtaining a more progressive action of the compressed air on the bullet in the space traversed by it along the barrel, so that the force applied to the bullet is more uniform and more constant acceleration; this results in better use of the potential energy of the compressed air and, therefore, a marked improvement in power of shooting as well as its accuracy.
- the improvements aimed at obtaining said objectives are essentially based on the constitution of a main piston system intended for the compression of air, in which said piston has an internal chamber closed by a floating piston. , the latter having a special retaining seal which allows an air passage so as to obtain the pressure balance between the main compressed air chamber and said auxiliary chamber; thus, once the loading of the weapon carried out, that is to say once the air intended for the projection will have been duly compressed, a pressure balance is established between the main chamber of compressed air and said auxiliary chamber separated by the floating piston, so that at the time of firing, the transmission of energy from the compressed air will be more progressive, which is the objective sought.
- This first application essentially provides for the constitution of the floating piston using a device closed by a rod provided, at one end, with a circular head serving precisely as a piston with an adjusted "retaining" member and, at the 'other end, a stop or any other stop member intended to limit the axial position of advance of the piston assembly.
- the construction of the floating piston may vary within wide limits with only one condition, which must be fulfilled in all cases: it must be arranged so as to slide inside a chamber or housing of the main piston and have a guide and stop device limiting its axial position.
- the main air compression piston with which the rifle is provided additionally comprises a free auxiliary piston placed in a chamber situated opposite the main compression cylinder.
- this special piston carrying a peripheral retaining gasket which moves inside the cavity where it is housed, so that in the air compression phase, the main piston of the rifle produces the compression of the air, passing partly behind the auxiliary piston at the start of the loading maneuver, admitting a determined quantity of pressurized air which will remain there permanently retained, so that during the discharge cycle, it will push the piston auxiliary, complementing the expansion action of the main air and obtaining a more efficient discharge of the weapon.
- the compensating piston will present the seal, arranged between the main and auxiliary chambers, of the sealed type, that is to say which does not allow air passage between said main and auxiliary chambers, a determined compression air having been provided in the auxiliary chamber.
- Figures 1, 2 and 3 each show a longitudinal section of a cylinder-piston assembly according to the present improvements and, respectively, in the loaded piston position and ready to fire, in the rest position after firing and in the position before compression air in the cylinder.
- Figure 4 shows a longitudinal section for assessing the arrangement of the main piston and the floating piston of the weapon as well as the unloading passage.
- FIG. 5 shows a sectional view similar to that of Figure 4, in which the main piston of the weapon is in the loading position before the air compression.
- Figures 6 and 7 show sectional views of the floating piston provided with two opposite seals and a double lip seal respectively.
- This piston is essentially characterized by the presence of an internal chamber -8- closed by the floating piston -9-, which has a special retaining seal -10- which allows an easy passage of air towards the interior of the chamber , but which hinders its exit.
- the floating piston -9- has a rod -12- provided with a stop collar -13- or any other member capable of supporting the axial force on the intermediate bearing -14- produced in the circular orifice of the piston -5-.
- the piston -5- when acting on the actuation lever of the weapon, the piston -5- is advanced to cause the compression of the air in the chamber -ll-, by increasing the pressure of the air, this gradually fills the auxiliary chamber -8- of the piston -5- deflecting the lip of the seal or sealing ring -10-.
- the auxiliary chamber -8- gradually fills with air at the start of the loading maneuver until the equilibrium pressure between the main air compression chamber -11- and the auxiliary chamber is obtained (or compression) -8-.
- the air contained in said auxiliary chamber remains stored permanently in said chamber.
- an air chamber -15- is formed at the same pressure as the air of the auxiliary chamber -8-.
- the present improvements provide for the presence of a floating piston -22- located opposite the main piston -16- and provided with a rubber seal of particular shape -23-, which constitutes a lip directed towards the rear, opposite the main piston, sliding inside the cavity -24- where said floating piston -22- is housed.
- This piston has a wide guide and stop collar, capable of supporting the axial force on the intermediate bearing -26-which limits its axial movement.
- the cavity -27- where the collar -25- is housed is closed at the rear using, for example, a cover -28- which presses on an elastic seal -29-.
- the main piston -16- also manages to support the axial force on the bearing -30- of the main cylinder.
- a conduit -21- intended for the discharge of compressed air communicates with the chamber where the bullet intended to be projected by the cannon will be located -18 - of the weapon.
- the version represented in FIGS. 6 and 7 comprises a floating piston -32- which, in its intermediate groove -33- is provided with a seal system or seals, formed by a single seal -34- of symmetrical shape, with opposite contact lips -35- and -36-, or a double seal formed by the two individual seals -37- and -38-, coupled so that the corresponding peripheral lips -39- and -40- are directed in the opposite direction.
- the compensation chamber is subjected to a pre-determined pressure during assembly of the weapon.
- the main piston -16- could be concave and the stop positions of the two pistons in their movement could be obtained by means of methods different from those indicated: one could for example have complementary springs of the two pistons.
- the floating piston could be located other than opposite the main piston.
- the precise shape of the retaining seals and other seals could be modified without departing from the scope of the present invention.
- the invention could be applied to any other type of compressed air weapon, such as pistols and rifles.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82109226T ATE14628T1 (de) | 1981-10-07 | 1982-10-06 | Luftgewehr. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES506667A ES8306867A1 (es) | 1981-10-07 | 1981-10-07 | Perfeccionamientos en las carabinas de aire comprimido |
ES506667 | 1981-10-07 | ||
ES513092A ES513092A0 (es) | 1982-05-19 | 1982-05-19 | "perfeccionamiento en las carabinas de aire comprimido". |
ES513092 | 1982-05-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0076520A1 true EP0076520A1 (de) | 1983-04-13 |
EP0076520B1 EP0076520B1 (de) | 1985-07-31 |
Family
ID=26156026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82109226A Expired EP0076520B1 (de) | 1981-10-07 | 1982-10-06 | Luftgewehr |
Country Status (4)
Country | Link |
---|---|
US (1) | US4572152A (de) |
EP (1) | EP0076520B1 (de) |
BR (1) | BR8205887A (de) |
DE (1) | DE3265094D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987003081A1 (en) * | 1985-11-11 | 1987-05-21 | John Brian Malpas Ford | Airgun |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2003367C1 (ru) * | 1992-09-23 | 1993-11-30 | Товарищество с ограниченной ответственностью "Иста" | Устройство дл выстреливани бросательных концов |
US5570676A (en) * | 1994-02-04 | 1996-11-05 | Gore; Thomas D. | Method for converting a mechanical spring gun to a pneumatic spring gun and the resulting pneumatic spring gun |
US6581585B2 (en) | 2001-11-16 | 2003-06-24 | Alfred F. Nibecker, Jr. | Air gun |
US7520275B2 (en) * | 2005-10-22 | 2009-04-21 | Long Robert M | Valve assembly for paintball guns and the like, and improved guns incorporating the assembly |
US20090084371A1 (en) * | 2007-10-01 | 2009-04-02 | Nibecker Jr Alfred F | Pneumatic device |
IT1393467B1 (it) * | 2009-03-09 | 2012-04-20 | V R V S R L | Dispositivo compatto per la ricarica di serbatoi d'aria, particolarmente per armi ad aria compressa. |
US8322329B1 (en) | 2010-01-06 | 2012-12-04 | Long Range, Llc | Systems, devices, and/or methods for launching a projectile |
US9562738B2 (en) * | 2013-05-10 | 2017-02-07 | Crosman Corporation | Split compression piston |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2414115A1 (de) * | 1974-03-23 | 1975-10-02 | Walther C Fa | Druckluftschusswaffe |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1612007A (en) * | 1924-04-09 | 1926-12-28 | Martin J Furlong | Controlling device for locomotive superheaters |
US2023771A (en) * | 1934-05-11 | 1935-12-10 | Ringius Carlos Leonardo | Cylinder pump for windmills |
US2754847A (en) * | 1951-07-20 | 1956-07-17 | Electrol Inc | Piston-type accumulators |
GB895873A (en) * | 1960-03-16 | 1962-05-09 | Automotive Prod Co Ltd | Improvements in or relating to loading means for maintaining dynamic loading on annular thrust members |
FR1392737A (fr) * | 1964-02-29 | 1965-03-19 | Arme de tir à air comprimé | |
DE1553929C3 (de) * | 1966-10-24 | 1974-10-10 | J.G. Anschuetz Gmbh, 7900 Ulm | Druckluftschusswaffe mit starrem Lauf |
US3415442A (en) * | 1967-01-13 | 1968-12-10 | Cornell Aeronautical Labor Inc | Isentropic compression tube |
US3955371A (en) * | 1974-11-18 | 1976-05-11 | Wagner Electric Corporation | Anti-cup cutting master cylinder |
US4038961A (en) * | 1975-08-22 | 1977-08-02 | Dahltron Corporation | Pneumatic rifle and hand gun |
-
1982
- 1982-10-06 DE DE8282109226T patent/DE3265094D1/de not_active Expired
- 1982-10-06 BR BR8205887A patent/BR8205887A/pt unknown
- 1982-10-06 US US06/433,098 patent/US4572152A/en not_active Expired - Fee Related
- 1982-10-06 EP EP82109226A patent/EP0076520B1/de not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2414115A1 (de) * | 1974-03-23 | 1975-10-02 | Walther C Fa | Druckluftschusswaffe |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987003081A1 (en) * | 1985-11-11 | 1987-05-21 | John Brian Malpas Ford | Airgun |
US4865009A (en) * | 1985-11-11 | 1989-09-12 | Ford John B M | Airgun |
Also Published As
Publication number | Publication date |
---|---|
BR8205887A (pt) | 1983-09-06 |
US4572152A (en) | 1986-02-25 |
DE3265094D1 (en) | 1985-09-05 |
EP0076520B1 (de) | 1985-07-31 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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AK | Designated contracting states |
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17P | Request for examination filed |
Effective date: 19830718 |
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ITF | It: translation for a ep patent filed |
Owner name: DR. ING. A. RACHELI & C. |
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