EP2205403B1 - Chisel, particularly for motor-driven machines - Google Patents
Chisel, particularly for motor-driven machines Download PDFInfo
- Publication number
- EP2205403B1 EP2205403B1 EP08786510.1A EP08786510A EP2205403B1 EP 2205403 B1 EP2205403 B1 EP 2205403B1 EP 08786510 A EP08786510 A EP 08786510A EP 2205403 B1 EP2205403 B1 EP 2205403B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chisel
- working
- working portion
- longitudinal axis
- section
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 15
- 230000035515 penetration Effects 0.000 description 8
- 239000011435 rock Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/02—Percussive tool bits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/305—Twisted part of a chisel or percussive non-drilling tool bit
Definitions
- the invention relates to a chisel, in particular for motor-driven machines according to the preamble of claim 1.
- a chisel is known from DE 463 571 known.
- a pointed chisel which has a utility area, wherein the chisel in the utility area has a trained as a polygon cross-section.
- a disadvantage of such chisels is their tendency to get stuck in this at a deep penetration into a material to be shredded or to jam or wed in this. Furthermore, it is considered disadvantageous that pieces of rock which are knocked off by the chisel are guided by the profile of the utilization area in the direction of a person handling the chisel.
- the invention has for its object to develop a chisel, which counteracts a sticking or jamming or wedging in the material against a deeper penetration into a material and counteracts a danger to the person handling the chisel by severed pieces of rock.
- the chisel according to the invention has at its second Working section along the longitudinal axis of the chisel on successive, perpendicular to the longitudinal axis cross-sectional surfaces, wherein successive cross-sectional areas are arranged around the longitudinal axis of the bit twisted to each other.
- the bit also acts with rotational forces on the material to be machined when penetrating the second working section penetrates into the material to be machined.
- side walls of the channel which creates the bit when penetrating into the material to be machined, worn or damaged and are thus less suitable to pinch the chisel.
- the twisted design of the second working section causes a deflection of rock parts.
- Core of the invention is the arrangement of a twisted second working portion between the first working portion and the connecting portion, the twisted second working portion counteracts by its destructive effect jamming in the material to be processed and also deflects rock parts that move in the direction of the person handling the chisel.
- the bit is designed as a pointed chisel, wherein the first working portion is formed by a pyramidal or conical tip. Chisels with such pointed tips are particularly suitable for penetrating deeply into a material, since the penetration initially behave like a nail.
- the invention provides a cylindrical embodiment of the second working section.
- a deep penetration of the bit into a material to be machined is favored, since no additional resistances of the material to be processed have to be overcome by the shape of the second working section.
- the chisel optimally adapted to the material to be machined, the motor or pneumatically driven machine used and the desired penetration.
- the invention further provides to make a diameter of the connecting portion and a diameter of an enveloping circle around the second working portion of the working end identical, to provide a stable transition between the second working portion and the connecting portion, which is not weakened by notch effects.
- a penetration of the connecting portion in the material to be machined is possible without a fracture of the chisel is to be feared.
- the invention provides, in particular, for the second working section of the working end to be designed as a splined shaft profile in each cross-section perpendicular to the longitudinal axis of the pointed chisel.
- Such a profiling can be easily manufactured manufacturing technology.
- the invention provides to provide the first working section, which forms the tip of the pointed chisel, with an untwisted surface. This will the penetration of the first working section, which forms a cutting edge, facilitates in the material to be processed.
- the first working portion is formed in a front, emanating from the cutting tip area as a conical shell or pyramidal with a smooth and groove-free surface.
- the pointed chisel in working mode with the first working section and approximately a front half of its second working section into material to be machined. This comparatively deep penetration of the chisel makes rapid work progress possible.
- the invention provides a plurality of grooves which circumscribe the second working portion of the working end of the pointed chisel.
- congruent cross-sectional areas are understood as meaning those cross-sectional areas which are embodied in a plane perpendicular to the longitudinal axis of the bit and which are congruent to one another.
- a congruence of conformity can be achieved after a rotation of a cross-sectional area about the longitudinal axis of the bit.
- motor-driven machines are to be understood as meaning, in particular, electrically and / or pneumatically driven machines.
- FIGS. 1a to 1c show a side view and two sectional views of a bit according to the invention.
- FIGS. 2a to 2c show a side view and two sectional views of a non-inventive bit.
- FIGS. 3a to 3c show three variants of chisels according to the invention in side view.
- FIG. 1a an inventive chisel 1 is shown in side view.
- the bit 1 is clamped in a direction indicated by dashed lines motor-driven machine 2 with a spigot 3.
- the insertion end 3 is connected via a connecting portion 4 with a working end. 5 connected.
- the working end 5 is composed of a first working section 6 and a second working section 7.
- the bit 1 is designed as a pointed chisel 8, wherein the first working portion 6 is formed by a conical or pyramidal tip 9 with a cutting tip 10.
- the bit 1 has a longitudinal axis 11 which extends through the cutting tip 10.
- FIG. 1b is a section through the second working portion 7 of the chisel 1 according to the in the FIG.
- the second working section 7 is formed in the section running perpendicular to the longitudinal axis 11 as a cross-sectional area A of a splined shaft profile 12, which is determined by four grooves 13a, 13b, 13c and 13d.
- the grooves 13a, 13b, 13c and 13d orbit the second working section 7 spirally (see FIG FIG. 1a ).
- the second working section 7 of the working end 5 is designed as a spiral section.
- a further section Ic-Ic which is executed parallel to the section Ib-Ib (see Figure 1c ), a cross-sectional area B, which is aligned with respect to the cross-sectional area A rotated about the longitudinal axis 11.
- the second working section 7 has a length L7, which is at least a quarter of a length L1 of the chisel 1.
- the diameter D7 of the enveloping circle HK7 corresponds to a diameter D4 of the connecting portion 4.
- the grooves 13a, 13b, 13c and 13d extend parallel to the longitudinal axis 11 into the first working portion 6 and the conical tip 9, respectively.
- the second working portion 7 of the working end 5 has a length L7 and the first working portion 6 of the working end 5 has a length L6.
- L7 > 2 x L6.
- the grooves 13a, 13b, 13c and 13d extend from the second working section 7 into the connecting section 4 parallel to the longitudinal axis 11.
- FIG. 2a a non-inventive chisel 1 is shown in side view.
- An insertion end 3 of the bit is connected via a connecting portion 4 with a working end 5.
- the working end 5 is composed of a first working section 6 and a second working section 7.
- the bit 1 is designed as a flat chisel 14, wherein the first working portion 6 is formed by a wedge-shaped tip 15 in side view from an arrow direction y.
- the wedge-shaped tip 15 has a cutting edge 16.
- the bit 1 has a longitudinal axis 11 which extends through the cutting edge 16.
- FIG. 2b is a section through the second working portion 7 of the chisel 1 according to the in the FIG. 2a shown section line IIb-IIb shown.
- the second working section 7 is formed in the section running perpendicular to the longitudinal axis 11 as a cross-sectional area C of a flat profile 20 which is determined on an upper side 17 and a lower side 18 by three ribs 19a, 19b, 19c and 19d, 19e, 19f, respectively.
- a further section IIc-IIc which is executed parallel to the section IIb-IIb (see Figure 2c ) has a cross-section D of the flat profile 20 in a relation to the cross-section C rotated by 90 ° position.
- FIGS. 3a to 3c show three embodiments of chisels 1 according to the invention with different diameters D4.
- a working section 7 is corresponding to that in the FIG. 1a shown chisel formed as a spiral section, said spiral section of grooves 13a to 13d in the in the FIGS. 3a to 3c shown chisels 1 to a cutting tip 10 towards changing slopes S73, S72 and S71.
- the value of a pitch angle to the cutting tip 10 increases from a value ⁇ 1 over a value ⁇ 2 to a value ⁇ 3.
- a change in the pitch angle takes place in the in the FIGS. 3a to 3c shown chisels 1 with continuous, non-erratic transitions.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
Die Erfindung betrifft einen Meißel insbesondere für motorgetriebene Maschinen gemäß dem Oberbegriff des Anspruchs 1. Ein solcher Meißel ist aus der
Aus der
Der Erfindung liegt die Aufgabe zugrunde, einen Meißel zu entwickeln, welcher auch bei einem tieferen Eindringen in ein Material einem Steckenbleiben bzw. Verklemmen bzw. Verkeilen in dem Material entgegen wirkt und einer Gefährdung einer den Meißel handhabenden Person durch abgeschlagene Gesteinsteile entgegenwirkt.The invention has for its object to develop a chisel, which counteracts a sticking or jamming or wedging in the material against a deeper penetration into a material and counteracts a danger to the person handling the chisel by severed pieces of rock.
Diese Aufgabe wird durch den unabhängigen Anspruch 1 gelöst. Vorteilhafte Ausführungsformen sind in den abhängigen Ansprüchen offenbart. Der erfindungsgemäße Meißel weist an seinem zweiten Arbeitsabschnitt entlang der Längsachse des Meißels aufeinanderfolgende, senkrecht zu der Längsachse stehende Querschnittsflächen auf, wobei aufeinaderfolgende Querschnittsflächen um die Längsachse des Meißels verdreht zueinander angeordnet sind. Hierdurch wirkt der Meißel beim Eindringen auch mit Drehkräften auf das zu bearbeitende Material, wenn der zweite Arbeitsabschnitt in das zu bearbeitende Material eindringt. Durch diese Drehkräfte werden Seitenwände des Kanals, welchen sich der Meißel beim Eindringen in das zu bearbeitende Material schafft, abgetragen bzw. beschädigt und sind hierdurch weniger geeignet den Meißel einzuklemmen. Gleichzeitig bewirkt die verdrehte Gestaltung des zweiten Arbeitsabschnitts eine Ablenkung von Gesteinsteilen. Kern der Erfindung ist die Anordnung eines verdrillten zweiten Arbeitsabschnitts zwischen dem ersten Arbeitsabschnitt und dem Verbindungsabschnitt, wobei der verdrillte zweite Arbeitsabschnitt durch seine zerstörerische Wirkung einem Verklemmen im zu bearbeitenden Material entgegenwirkt und zusätzlich Gesteinsteile ablenkt, die sich in Richtung der den Meißel handhabenden Person bewegen. Erfindungsgemäß ist der Meißel als Spitzmeißel ausgebildet, wobei der erste Arbeitsabschnitt durch eine pyramidenförmige oder kegelartige Spitze gebildet ist. Meißel mit derartig ausgeführten Spitzen sind besonders dafür geeignet, tief in ein Material einzudringen, da sich beim Eindringen zunächst ähnlich wie ein Nagel verhalten. Weiterhin sieht die Erfindung eine zylinderförmige Ausführung des zweiten Arbeitsabschnitts vor. Hierdurch wird im Gegensatz zu einem konisch ausgebildeten zweiten Arbeitsabschnitt ein tiefes Eindringen des Meißels in ein zu bearbeitendes Material begünstigt, da durch die Form des zweiten Arbeitsabschnitts keine zusätzlichen Widerstände des zu bearbeitenden Materials überwunden werden müssen. Erfindungsgemäß verläuft in dem zweiten Arbeitsabschnitt zwischen dem ersten Arbeitsabschnitt und dem Verbindungsabschnitt des Spitzmeißels wenigstens eine Nut schraubenlinienförmig um die Längsachse des Spitzmeißels, wobei die Nut einen Steigungswinkel zwischen α = 2° und α = 70° aufweist, welcher insbesondere bei α = 33° liegt. Zum Beispiel ist es durch die Zahl der Nuten und deren Steigungswinkel möglich, den Meißel optimal auf das zu bearbeitende Material, die verwendete motor- bzw. pneumatisch angetriebene Maschine und das gewünschte Eindringverhalten anzupassen.This object is solved by the independent claim 1. Advantageous embodiments are disclosed in the dependent claims. The chisel according to the invention has at its second Working section along the longitudinal axis of the chisel on successive, perpendicular to the longitudinal axis cross-sectional surfaces, wherein successive cross-sectional areas are arranged around the longitudinal axis of the bit twisted to each other. As a result, the bit also acts with rotational forces on the material to be machined when penetrating the second working section penetrates into the material to be machined. By these rotational forces side walls of the channel, which creates the bit when penetrating into the material to be machined, worn or damaged and are thus less suitable to pinch the chisel. At the same time the twisted design of the second working section causes a deflection of rock parts. Core of the invention is the arrangement of a twisted second working portion between the first working portion and the connecting portion, the twisted second working portion counteracts by its destructive effect jamming in the material to be processed and also deflects rock parts that move in the direction of the person handling the chisel. According to the invention, the bit is designed as a pointed chisel, wherein the first working portion is formed by a pyramidal or conical tip. Chisels with such pointed tips are particularly suitable for penetrating deeply into a material, since the penetration initially behave like a nail. Furthermore, the invention provides a cylindrical embodiment of the second working section. In this way, in contrast to a conically shaped second working section, a deep penetration of the bit into a material to be machined is favored, since no additional resistances of the material to be processed have to be overcome by the shape of the second working section. According to the invention runs in the second working section between the first working section and the Connecting portion of the pointed chisel at least one groove helically around the longitudinal axis of the chisel, wherein the groove has a pitch angle between α = 2 ° and α = 70 °, which in particular is α = 33 °. For example, it is possible by the number of grooves and their pitch angle, the chisel optimally adapted to the material to be machined, the motor or pneumatically driven machine used and the desired penetration.
Die Erfindung sieht weiterhin vor, einen Durchmesser des Verbindungsabschnitts und einen Durchmesser eines Hüllkreises um den zweiten Arbeitsabschnitt des Arbeitsendes identisch auszuführen, um einen stabilen Übergang zwischen dem zweiten Arbeitsabschnitt und dem Verbindungsabschnitt zu schaffen, welcher nicht durch Kerbwirkungen geschwächt ist. Somit ist notfalls auch ein Eindringen des Verbindungsabschnitts in das zu bearbeitende Material möglich, ohne dass ein Bruch des Meißels zu befürchten ist.The invention further provides to make a diameter of the connecting portion and a diameter of an enveloping circle around the second working portion of the working end identical, to provide a stable transition between the second working portion and the connecting portion, which is not weakened by notch effects. Thus, if necessary, a penetration of the connecting portion in the material to be machined is possible without a fracture of the chisel is to be feared.
Die Erfindung sieht insbesondere vor, den zweiten Arbeitsabschnitt des Arbeitsendes in jedem Querschnitt senkrecht zu der Längsachse des Spitzmeißels als Keilwellenprofil auszubilden. Eine derartige Profilierung lässt sich fertigungstechnisch einfach herstellen.The invention provides, in particular, for the second working section of the working end to be designed as a splined shaft profile in each cross-section perpendicular to the longitudinal axis of the pointed chisel. Such a profiling can be easily manufactured manufacturing technology.
Weiterhin sieht die Erfindung vor, den ersten Arbeitsabschnitt, welcher die Spitze des Spitzmeißels bildet, mit einer unverdrillten Oberfläche zu versehen. Hierdurch wird das Eindringen des ersten Arbeitsabschnitts, welcher eine Schneide bildet, in das zu bearbeitende Material erleichtert. Insbesondere ist der erste Arbeitsabschnitt in einem vorderen, von der Schneidspitze ausgehenden Bereich als Kegelmantel oder pyramidenförmig mit einer glatten und rillenfreien Oberfläche ausgebildet.Furthermore, the invention provides to provide the first working section, which forms the tip of the pointed chisel, with an untwisted surface. This will the penetration of the first working section, which forms a cutting edge, facilitates in the material to be processed. In particular, the first working portion is formed in a front, emanating from the cutting tip area as a conical shell or pyramidal with a smooth and groove-free surface.
Erfindungsgemäß ist es vorgesehen, den Spitzmeißel im Arbeitsbetrieb mit dem ersten Arbeitsabschnitt und etwa einer vorderen Hälfte seines zweiten Arbeitsabschnitts in zu bearbeitendes Material einzuschlagen. Durch dieses vergleichsweise tiefe Eindringen des Meißels ist ein rascher Arbeitsfortschritt möglich.According to the invention, it is provided to strike the pointed chisel in working mode with the first working section and approximately a front half of its second working section into material to be machined. This comparatively deep penetration of the chisel makes rapid work progress possible.
Insbesondere sieht die Erfindung mehrere Nuten vor, welche den zweiten Arbeitsabschnitt des Arbeitsendes des Spitzmeißels umlaufen.In particular, the invention provides a plurality of grooves which circumscribe the second working portion of the working end of the pointed chisel.
Im Sinne der Erfindung werden unter kongruenten Querschnittsflächen solche Querschnittsflächen verstanden, welche in einer senkrecht zu der Längsachse des Meißels liegenden Ebene ausgeführt sind und welche deckungsgleich zueinander sind. Bei den fraglichen Querschnittsflächen des erfindungsgemäßen Meißels ist eine Deckungsgleichheit nach einer Drehung einer Querschnittsfläche um die Längsachse des Meißels erreichbar.For the purposes of the invention, congruent cross-sectional areas are understood as meaning those cross-sectional areas which are embodied in a plane perpendicular to the longitudinal axis of the bit and which are congruent to one another. With the cross-sectional areas in question of the bit according to the invention, a congruence of conformity can be achieved after a rotation of a cross-sectional area about the longitudinal axis of the bit.
Im Sinne der Erfindung sind unter motorgetriebenen Maschinen insbesondere elektrisch und/oder pneumatisch angetriebene Maschinen zu verstehen.For the purposes of the invention, motor-driven machines are to be understood as meaning, in particular, electrically and / or pneumatically driven machines.
Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematisch dargestellten Ausführungsbeispielen beschrieben.Further details of the invention are described in the drawing with reference to schematically illustrated embodiments.
Die
Die
Die
In der
In der
Die
Die Erfindung ist nicht auf dargestellte oder beschriebene Ausführungsbeispiele beschränkt. Sie umfasst vielmehr Weiterbildungen der Erfindung im Rahmen der Schutzrechtsansprüche.The invention is not limited to illustrated or described embodiments. Rather, it includes developments of the invention within the scope of the patent claims.
Claims (6)
- Chisel (1), in particular for motor-driven machines (2), having a machine-side plug-in end (3) for receiving the chisel (1) in the machine (2), a working end (5) at the opposite end from the plug-in end (3), and a connecting portion (4) between the plug-in end (3) and the working end (5), wherein the working end (5) comprises a first working portion (6) and a second working portion (7), wherein the first working portion (6) narrows to a cutting tip (9), wherein the second working portion (7) is profiled between the first working portion (6) and the connecting portion (4) of the chisel (1), and wherein all cross-sectional areas (A, B; C, D), oriented perpendicularly to a longitudinal axis (11) of the chisel (1), of the second working portion (7) are congruent to one another, wherein the cross-sectional areas (A, B; C, D), following one another along the longitudinal axis (11) of the chisel (1) and perpendicular to the longitudinal axis (11), of the second working portion (7) are arranged in a twisted manner with respect to one another about the longitudinal axis (11) of the chisel (1), and the chisel (1) is in the form of a pointed chisel (8), wherein the first working portion (6) is formed by a conical or pyramidal tip (9) and in the second working portion (7), between the first working portion (6) and the connecting portion (4) of the pointed chisel (8), at least one groove (13a, 13b, 13c, 13d) extends helically about the longitudinal axis (11) of the pointed chisel (8), characterized in that the groove (13a, 13b, 13c, 13d) has a constant pitch angle (α) between α = 2° and α = 70°, wherein the groove (13a, 13b, 13c, 13d) runs out parallel to the longitudinal axis (11) from the second working portion (7) into the first working portion (6) and into the connecting portion (4).
- Chisel according to Claim 1, characterized in that the second working portion (7) is formed in a cylindrical manner.
- Chisel according to Claim 1, characterized in that the groove (13a, 13b, 13c, 13d) has a pitch angle (α) where α = 12°.
- Chisel according to one of the preceding Claims 1 to 3, characterized in that a diameter (D4) of the connecting portion (4) and a diameter (D7) of an envelope circle (HK7) about the second working portion (7) of the working end (5) are virtually identical.
- Chisel according to one of the preceding Claims 1 to 4, characterized in that, during working operation, the pointed chisel (8) is drivable into material to be processed with the first working portion (6) and approximately a front half of its second working portion (7).
- Chisel according to one of the preceding Claims 1 to 5, characterized in that a plurality of grooves (13a, 13b, 13c, 13d) run around the second working portion (7) of the working end (5) of the pointed chisel (8).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710046759 DE102007046759A1 (en) | 2007-09-28 | 2007-09-28 | Chisels especially for motor-driven machines |
PCT/EP2008/059869 WO2009043617A1 (en) | 2007-09-28 | 2008-07-28 | Chisel, particularly for motor-driven machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2205403A1 EP2205403A1 (en) | 2010-07-14 |
EP2205403B1 true EP2205403B1 (en) | 2018-11-21 |
Family
ID=39951554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08786510.1A Active EP2205403B1 (en) | 2007-09-28 | 2008-07-28 | Chisel, particularly for motor-driven machines |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2205403B1 (en) |
DE (1) | DE102007046759A1 (en) |
WO (1) | WO2009043617A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2960811B1 (en) * | 2010-06-02 | 2013-03-29 | Diager | PIC GENDER TOOL |
EP2502710B1 (en) | 2011-03-22 | 2020-04-22 | Black & Decker Inc. | Chisels |
USD737875S1 (en) | 2013-03-15 | 2015-09-01 | Black & Decker Inc. | Drill bit |
USD734792S1 (en) | 2013-03-15 | 2015-07-21 | Black & Decker Inc. | Drill bit |
DE102019200776A1 (en) * | 2019-01-23 | 2020-07-23 | Robert Bosch Gmbh | Insert tool and method for manufacturing an insert tool |
USD921465S1 (en) | 2019-05-06 | 2021-06-08 | Milwaukee Electric Tool Corporation | Mortar knife |
USD923447S1 (en) | 2019-05-06 | 2021-06-29 | Milwaukee Electric Tool Corporation | Chisel |
USD922842S1 (en) | 2019-05-06 | 2021-06-22 | Milwaukee Electric Tool Corporation | Chisel |
USD922841S1 (en) | 2019-05-06 | 2021-06-22 | Milwaukee Electric Tool Corporation | Chisel |
USD922840S1 (en) | 2019-05-06 | 2021-06-22 | Milwaukee Electric Tool Corporation | Chisel |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE463571C (en) * | 1928-08-01 | Ed Doerrenberg Soehne Ohg | Multi-edged pointed iron for mining hammers | |
DE733686C (en) * | 1940-04-04 | 1943-04-01 | Ernst Doering Fa | Hardened profile chisel |
FR1154607A (en) * | 1955-07-04 | 1958-04-14 | Jack hammer needle | |
FR2098822A5 (en) * | 1970-07-23 | 1972-03-10 | Muller Sa | |
DE10244509A1 (en) | 2002-09-25 | 2004-04-08 | Hilti Ag | Pointed chisel |
-
2007
- 2007-09-28 DE DE200710046759 patent/DE102007046759A1/en not_active Withdrawn
-
2008
- 2008-07-28 WO PCT/EP2008/059869 patent/WO2009043617A1/en active Application Filing
- 2008-07-28 EP EP08786510.1A patent/EP2205403B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
DE102007046759A1 (en) | 2009-04-02 |
WO2009043617A1 (en) | 2009-04-09 |
EP2205403A1 (en) | 2010-07-14 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20100428 |
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