CA2056545A1 - Drilling and chipping apparatus - Google Patents
Drilling and chipping apparatusInfo
- Publication number
- CA2056545A1 CA2056545A1 CA002056545A CA2056545A CA2056545A1 CA 2056545 A1 CA2056545 A1 CA 2056545A1 CA 002056545 A CA002056545 A CA 002056545A CA 2056545 A CA2056545 A CA 2056545A CA 2056545 A1 CA2056545 A1 CA 2056545A1
- Authority
- CA
- Canada
- Prior art keywords
- tool
- anvil
- holder
- shifting member
- drilling
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D16/006—Mode changers; Mechanisms connected thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/06—Means for driving the impulse member
- B25D2211/062—Cam-actuated impulse-driving mechanisms
- B25D2211/064—Axial cams, e.g. two camming surfaces coaxial with drill spindle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Lasers (AREA)
- Drilling And Boring (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A drilling and chipping tool includes a striker mechanism and a holder (10) for a tool bit. Blows are transmit-ted to the holder and the tool bit through an axially extending anvil (4) located in the tool. The anvil (4) can be connected to a shifting member (7) by a locking element (6). The shifting element (7) is axially displaceable by an actuation member (8).
The axial displacement of the shifting member (7) moves the anvil (4) between a first position for transmitting blows and a second position for blocking the transmission of blows from the anvil (4) to the holder (10).
A drilling and chipping tool includes a striker mechanism and a holder (10) for a tool bit. Blows are transmit-ted to the holder and the tool bit through an axially extending anvil (4) located in the tool. The anvil (4) can be connected to a shifting member (7) by a locking element (6). The shifting element (7) is axially displaceable by an actuation member (8).
The axial displacement of the shifting member (7) moves the anvil (4) between a first position for transmitting blows and a second position for blocking the transmission of blows from the anvil (4) to the holder (10).
Description
2 ~
B~CKGROUND OF THE INVENTION
The present invention is directed to a manually operated drilling and chipping tool including a striker mechanism and a tool bit holder. The striker mechanism delivers axially directed blows through an anvil to a tool bit clamped in the holder. The anvil has at least one recess into which a locking element can be positioned by a shifting member operable from the outside by a actuation member.
In a hammer drill disclosed in DE-PS 3 627 869 the blocking of blows by a pneumatic striker mechanism is achieved by hook shaped elements shiftable into a recess of a striking member. The striking member is thus held in an end position where it can not deliver blows to the tool bit.
' ~ The hook shaped elements are movable in the radial idirection. An actuation device operable from the outside ~includes an eccentric deformation in the radial direction in ~its interior circumferential region, so that the axial stroke of a pin`shaped element can be controlled. Accordingly, axial movement of the pin shaped element can be achieved by turning the actuation device in the circumferential direction, whereby l¦the pin shaped element controls the radial movement of the `~hooked shaped elements. Since the striking member can be locked only in its leading position, it must be designed so that it can `press the hooked shaped elements which are biased by spring means in the radial direction. The elements are displaced ' ~
radially apart over an inclined plane, so that the inclined plane can drop into a recess in the strlking member following on the inclined plane. As a result, the striking member can be locked only when it is moved by the striking mechanism in the working or operational direction.
SUMMARY O~ THE INVENTION
Therefore, it is the primary object of the present invention to provide a locking device whereby the anvil delivering axial blows can be displaced into a position where the blows are not effectively directed. The locking action can be achieved without placing the entire tool into operation.
In accordance with the present invention, an actuation member includes means for axially displacing a shifting member.
When the actuation member is operated, the shifting member is moved in the axial direction within the actuating member. As a result, the anvil connected to the switching member by a locking element can be shifted into a position where ~it does not convey axially directed blows. This position of the jlanvil can be achieved by the tool operator exclusively by operating the actuation member, without having to start up or place the entire tool in operation.
'I
The tool is advantageously distinguished where the actuation means is at least one control curve or cam arranged on 2 ~
the inside of the actuation member. The movement of the actuation means is transmitted to the shifting member by a control cam.
Preferably, the control curve is a helically shaped groove. By turning the actuation member in the circumferential direction, such movement is translated into axial movement of the shifting member. The ratio of the axial movement of the shifting member to the turning angle of the actuation member can be defined by the pitch of the helically shaped groove.
Another advantage of the invention is that parts of tha shifting member engage in the helical groove. This interaction achieves guidance and precise motion of the shifting member b~ the actuation member.
` Parts of the shifting member are preferably cams ;arranged in the circumferential region of the shifting member.
Expediently, these cams correspond in shape to the cross section and pitch of the helically shaped groove. By arranging these ~cams in the circumferential direction, their fabrication is ~simple and economical.
ii .
The present invention is especially suited to a drilling and chipping tool with a removable tool bit holder.
~Reversing or switching off the striking operation of the anvil ,in the tool is eliminated. Particularly in identical working operations, e~tending over a long period of time, it is 2~6~
advanta~eous if the operator does not constantly have to monitor whether the correct adjustment has been made on the tool.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the 'invention.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a partial side elevational view of the leading end of a drilling and chipping tool with a tool bit holder in the unlocked position; and Fig. 2 is a view similar to Fig. 1 but with the tool ~holder in the locked position.
i1 ~
DETAILED DESCRIPTION OF ~E_INVENTION
In Fig. 1 the leading end region of a drilling and chipping tool is shown with an axially extending guidance sleeve ,1. Guidance sleeve 1 is supported in the tool housing 3 so that 'it can rotate in two ball bearings 2. A stop shoulder for one 2~6~
of the ball bearings 2 in the housing 3 is formed by a circlip 3a. In the trailing end part of -the guidance sleeve 1 there is a known pneumatic striking mechanism with a striking piston, not shown.
In the leading end region of the guidance sleeve 1, an anvil 4 is axially displaceably supported. Adjacent its leading and, anvil 4 has axially extending teeth for effecting rotation-al entrainment and transmitting torque. A circumferential groove 5 is formed in the anvil 4 in the trailing end region of the teeth 4a. Preferably, the groove is circularly shaped and corresponds to the shape of a locking element 6, shown as a ball.
~ A tool holder 10 designed especially for pure rotational movement is fitted into the leading end of the tool.
Tool holder 10 has an aperture lla in its trailing end region.
Interior teeth, designed to match the teeth 4a on the an~il, are arranged in the region of the aperture lla. In Fig. 1 the locking element 6 is located in the unlocked position in the ,central region of a recess in the tool bit holder shank 11.
Several locking elements 6 can be used. Preferably, three ~,jlocking elements 6 are arranged in the circumferential region of ;!the tool bit holder shank 11 spaced apart at an angle of 120.
i The locking element 6 is guided in a radially extending bore llb in which the ball or locking element 6 can be moved in the radial dir-ction `ore 11b is located in the 2 ~ 5 trailing end region of the tool bit holder shank 11. The diameter of the ball 6 exceeds the wall thickness of the tool holder shank 11 in the region of the recess lla. The shifting member 7 includes control means 7b, whereby the locking element 6 can be engaged radially inwardly or disengaged radially outwardly. Since several locking elements may be provided spaced apart in the circumferential direction, then such locking elements could also be controlled by the shifting member 7. The shifting member 7 is operably displaced by an actuation member 8 positioned at the leading end of the housing 3 at the outside of the tool.
The shifting member 7 is basically cylindrically shaped and essentially axially displaceable within the actuation member 8. At least one cam 7a is arranged on the outer circumferential surface of the shifting member 7.
In its interior surface, the actuation member 8 has helically shaped grooves 9 and in transverse cross section the grooves are rectangularly shaped. Correspondingly, the cams 7a have a complementary shape and engage into the helically shaped grooves 9. At their opposite ends, each groove 9 has a region 9a extending perpendicularly of the axis of the tool bit holder, that is, without any incline or pitch. This region 9a forms a self-locking feature against turning of the actuation member 8 relative to the shifting member 7 when axial loading exists.
. . .
:, 2 ~
To obtain pure rotational movement of a drill bit in the holder 10, the anvil is placed and locked in a position where blows can not be directed against the tool bit holder.
Two recesses, not shown, are located in the circum-ferential region at the trailing end of the tool bit holder shank 11 into which an adjustment element can be shifted. This adjustment element holds the actuation member 8 in the locked or unlocked position.
In Fig. 2 the locking element 6 is shown engaged in the circumferential groove 5 of the anvil 4. The shifting member 7 has been axially displaced from the position shown in Fig. 1 by turning the actuation member 8 about the axis of the anvil 4 and the tool bit holder shank 11. Since the shifting ~nember is connected to the holder shank 11 and to the anvil 4 throuqh the locking element 6, axial movement of all of these ~arts occur when turning the actuation member 8. The anvil 4 is displaced into the position where the application of blows is ineffective and it is retained in that position. Accordingly, the drilling and chipping tool can be operated with pure ``rotational movement.
~, In the basic position of the tool, the shifting member 7 is located at the trailing end of the actuation member 8, note Fig. 1. The locking element 6 in the form of a ball is in the ,iunlocked position. The tool bit holder shank 11 is placed on the leading end region of the anvil 4 so that the two sets of 2 ~
teeth 4, lla mesh. An intermediate disk 16 is located in widened circumferential recess 17 in the trailing end region of the actuation member 8, and the disk is fixed in position in the recess 17 by circlips 16a. The intermediate dlsk comprises a stop collar 16b abutting against an end face la of the guide sleeve 1.
B~ turning the actuation member 8 in the circumferen-tial direction, the shifting member 7 rotates along with the actuation member. The shifting member 7 moves into the position shown in Fig. 2 and the locking element 6 moves into the locked position. The ball shaped locking element 6, engages in the circumferentially ex.tending recess 5 in the anvil 4.
As shown best in Fig. 2, a recess 12 is arranged in the end region of the helically shaped groove 9, that is, the part of the groove e~tending without pitch or incline, and an anti-rotational securing element 13 mounted in the shifting member 7 can be displaced into the recess 12. The anti-rotation securing element 13 is a spring biased ball arranged in a blind ~bore 14 in the cam 7a of the shifting member 7. The blind bore ~14 extends in the radial direction. The securing element or 'ball 13 is guided in the bore 14 and presses against a spring 15 ,ilocated within the bore. The spring abuts against the bottom of the bore. By turning the actuation member 8, the ball 13 is ~shifted out of the recess 12 at the end of the helically shaped groove 9 and is shifted into the bore 14 in the cam.
, 2 ~
With further turning of the actuation member 8, the cam 7a leaves the end region ga of the groove 9 arranged without pitch or incline, and moves into the helically shaped region of the groove. As a result, there is relative motion of the shifting member 7 in the axial direction with respect to the actuation member 8.
At the opposite end of the helically shaped region thare is located another end region 9a of the groove 9 extending without pitch or incline whereby a self locking effect is achieved against unintended turning of the actuation member 8.
When the forward position of the shifting member 7 is reached, as in Fig. 2, the anvil 4 is locked into position so that the direction of blows is ineffective. The rotational movement produced by the drive and transmitted to the anvil 4 is conveyed through the anvil to the tool bit holder shank 11 and then to a tool bit, note shown, clamped in the holder 10. The release or unlocking of the anvil takes place in a reverse sequence to that described above.
While specific embodiments of the invention have been shown and described in detail to illustrate the application of ~the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
., ~, `; 10 ' `
B~CKGROUND OF THE INVENTION
The present invention is directed to a manually operated drilling and chipping tool including a striker mechanism and a tool bit holder. The striker mechanism delivers axially directed blows through an anvil to a tool bit clamped in the holder. The anvil has at least one recess into which a locking element can be positioned by a shifting member operable from the outside by a actuation member.
In a hammer drill disclosed in DE-PS 3 627 869 the blocking of blows by a pneumatic striker mechanism is achieved by hook shaped elements shiftable into a recess of a striking member. The striking member is thus held in an end position where it can not deliver blows to the tool bit.
' ~ The hook shaped elements are movable in the radial idirection. An actuation device operable from the outside ~includes an eccentric deformation in the radial direction in ~its interior circumferential region, so that the axial stroke of a pin`shaped element can be controlled. Accordingly, axial movement of the pin shaped element can be achieved by turning the actuation device in the circumferential direction, whereby l¦the pin shaped element controls the radial movement of the `~hooked shaped elements. Since the striking member can be locked only in its leading position, it must be designed so that it can `press the hooked shaped elements which are biased by spring means in the radial direction. The elements are displaced ' ~
radially apart over an inclined plane, so that the inclined plane can drop into a recess in the strlking member following on the inclined plane. As a result, the striking member can be locked only when it is moved by the striking mechanism in the working or operational direction.
SUMMARY O~ THE INVENTION
Therefore, it is the primary object of the present invention to provide a locking device whereby the anvil delivering axial blows can be displaced into a position where the blows are not effectively directed. The locking action can be achieved without placing the entire tool into operation.
In accordance with the present invention, an actuation member includes means for axially displacing a shifting member.
When the actuation member is operated, the shifting member is moved in the axial direction within the actuating member. As a result, the anvil connected to the switching member by a locking element can be shifted into a position where ~it does not convey axially directed blows. This position of the jlanvil can be achieved by the tool operator exclusively by operating the actuation member, without having to start up or place the entire tool in operation.
'I
The tool is advantageously distinguished where the actuation means is at least one control curve or cam arranged on 2 ~
the inside of the actuation member. The movement of the actuation means is transmitted to the shifting member by a control cam.
Preferably, the control curve is a helically shaped groove. By turning the actuation member in the circumferential direction, such movement is translated into axial movement of the shifting member. The ratio of the axial movement of the shifting member to the turning angle of the actuation member can be defined by the pitch of the helically shaped groove.
Another advantage of the invention is that parts of tha shifting member engage in the helical groove. This interaction achieves guidance and precise motion of the shifting member b~ the actuation member.
` Parts of the shifting member are preferably cams ;arranged in the circumferential region of the shifting member.
Expediently, these cams correspond in shape to the cross section and pitch of the helically shaped groove. By arranging these ~cams in the circumferential direction, their fabrication is ~simple and economical.
ii .
The present invention is especially suited to a drilling and chipping tool with a removable tool bit holder.
~Reversing or switching off the striking operation of the anvil ,in the tool is eliminated. Particularly in identical working operations, e~tending over a long period of time, it is 2~6~
advanta~eous if the operator does not constantly have to monitor whether the correct adjustment has been made on the tool.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the 'invention.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Fig. 1 is a partial side elevational view of the leading end of a drilling and chipping tool with a tool bit holder in the unlocked position; and Fig. 2 is a view similar to Fig. 1 but with the tool ~holder in the locked position.
i1 ~
DETAILED DESCRIPTION OF ~E_INVENTION
In Fig. 1 the leading end region of a drilling and chipping tool is shown with an axially extending guidance sleeve ,1. Guidance sleeve 1 is supported in the tool housing 3 so that 'it can rotate in two ball bearings 2. A stop shoulder for one 2~6~
of the ball bearings 2 in the housing 3 is formed by a circlip 3a. In the trailing end part of -the guidance sleeve 1 there is a known pneumatic striking mechanism with a striking piston, not shown.
In the leading end region of the guidance sleeve 1, an anvil 4 is axially displaceably supported. Adjacent its leading and, anvil 4 has axially extending teeth for effecting rotation-al entrainment and transmitting torque. A circumferential groove 5 is formed in the anvil 4 in the trailing end region of the teeth 4a. Preferably, the groove is circularly shaped and corresponds to the shape of a locking element 6, shown as a ball.
~ A tool holder 10 designed especially for pure rotational movement is fitted into the leading end of the tool.
Tool holder 10 has an aperture lla in its trailing end region.
Interior teeth, designed to match the teeth 4a on the an~il, are arranged in the region of the aperture lla. In Fig. 1 the locking element 6 is located in the unlocked position in the ,central region of a recess in the tool bit holder shank 11.
Several locking elements 6 can be used. Preferably, three ~,jlocking elements 6 are arranged in the circumferential region of ;!the tool bit holder shank 11 spaced apart at an angle of 120.
i The locking element 6 is guided in a radially extending bore llb in which the ball or locking element 6 can be moved in the radial dir-ction `ore 11b is located in the 2 ~ 5 trailing end region of the tool bit holder shank 11. The diameter of the ball 6 exceeds the wall thickness of the tool holder shank 11 in the region of the recess lla. The shifting member 7 includes control means 7b, whereby the locking element 6 can be engaged radially inwardly or disengaged radially outwardly. Since several locking elements may be provided spaced apart in the circumferential direction, then such locking elements could also be controlled by the shifting member 7. The shifting member 7 is operably displaced by an actuation member 8 positioned at the leading end of the housing 3 at the outside of the tool.
The shifting member 7 is basically cylindrically shaped and essentially axially displaceable within the actuation member 8. At least one cam 7a is arranged on the outer circumferential surface of the shifting member 7.
In its interior surface, the actuation member 8 has helically shaped grooves 9 and in transverse cross section the grooves are rectangularly shaped. Correspondingly, the cams 7a have a complementary shape and engage into the helically shaped grooves 9. At their opposite ends, each groove 9 has a region 9a extending perpendicularly of the axis of the tool bit holder, that is, without any incline or pitch. This region 9a forms a self-locking feature against turning of the actuation member 8 relative to the shifting member 7 when axial loading exists.
. . .
:, 2 ~
To obtain pure rotational movement of a drill bit in the holder 10, the anvil is placed and locked in a position where blows can not be directed against the tool bit holder.
Two recesses, not shown, are located in the circum-ferential region at the trailing end of the tool bit holder shank 11 into which an adjustment element can be shifted. This adjustment element holds the actuation member 8 in the locked or unlocked position.
In Fig. 2 the locking element 6 is shown engaged in the circumferential groove 5 of the anvil 4. The shifting member 7 has been axially displaced from the position shown in Fig. 1 by turning the actuation member 8 about the axis of the anvil 4 and the tool bit holder shank 11. Since the shifting ~nember is connected to the holder shank 11 and to the anvil 4 throuqh the locking element 6, axial movement of all of these ~arts occur when turning the actuation member 8. The anvil 4 is displaced into the position where the application of blows is ineffective and it is retained in that position. Accordingly, the drilling and chipping tool can be operated with pure ``rotational movement.
~, In the basic position of the tool, the shifting member 7 is located at the trailing end of the actuation member 8, note Fig. 1. The locking element 6 in the form of a ball is in the ,iunlocked position. The tool bit holder shank 11 is placed on the leading end region of the anvil 4 so that the two sets of 2 ~
teeth 4, lla mesh. An intermediate disk 16 is located in widened circumferential recess 17 in the trailing end region of the actuation member 8, and the disk is fixed in position in the recess 17 by circlips 16a. The intermediate dlsk comprises a stop collar 16b abutting against an end face la of the guide sleeve 1.
B~ turning the actuation member 8 in the circumferen-tial direction, the shifting member 7 rotates along with the actuation member. The shifting member 7 moves into the position shown in Fig. 2 and the locking element 6 moves into the locked position. The ball shaped locking element 6, engages in the circumferentially ex.tending recess 5 in the anvil 4.
As shown best in Fig. 2, a recess 12 is arranged in the end region of the helically shaped groove 9, that is, the part of the groove e~tending without pitch or incline, and an anti-rotational securing element 13 mounted in the shifting member 7 can be displaced into the recess 12. The anti-rotation securing element 13 is a spring biased ball arranged in a blind ~bore 14 in the cam 7a of the shifting member 7. The blind bore ~14 extends in the radial direction. The securing element or 'ball 13 is guided in the bore 14 and presses against a spring 15 ,ilocated within the bore. The spring abuts against the bottom of the bore. By turning the actuation member 8, the ball 13 is ~shifted out of the recess 12 at the end of the helically shaped groove 9 and is shifted into the bore 14 in the cam.
, 2 ~
With further turning of the actuation member 8, the cam 7a leaves the end region ga of the groove 9 arranged without pitch or incline, and moves into the helically shaped region of the groove. As a result, there is relative motion of the shifting member 7 in the axial direction with respect to the actuation member 8.
At the opposite end of the helically shaped region thare is located another end region 9a of the groove 9 extending without pitch or incline whereby a self locking effect is achieved against unintended turning of the actuation member 8.
When the forward position of the shifting member 7 is reached, as in Fig. 2, the anvil 4 is locked into position so that the direction of blows is ineffective. The rotational movement produced by the drive and transmitted to the anvil 4 is conveyed through the anvil to the tool bit holder shank 11 and then to a tool bit, note shown, clamped in the holder 10. The release or unlocking of the anvil takes place in a reverse sequence to that described above.
While specific embodiments of the invention have been shown and described in detail to illustrate the application of ~the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
., ~, `; 10 ' `
Claims (5)
1. Manually operated drilling and chipping tool comprising a holder 10 for a tool bit, said drilling and chipping tool arranged to operate as a rotary drill with only rotary movement of the holder (10) or as a hammer drill with combined rotary and percussive movement of the holder, a tool housing (3) having a leading end with said holder mounted in the leading end, an axially extending anvil (4) located within said housing and arranged to deliver axially directed blows to said holder (10), said anvil (4) has at least one recess therein, a locking element (6) is displaceable into the recess in said anvil (4) by a shifting member (7), an actuation member (8) mounted on said housing and accessible on the leading end thereof and in engagement with said shifting member (7), wherein the improvement comprises that said actuating member (8) includes means for producing axial movement of said shifting member (7) within said housing (3).
2. Manually operated drilling and chipping tool, as set forth in claim 1, wherein said means comprises at least one control cam or curve located on an inside surface of the actuation member (8).
3. Manually operated drilling and chipping tool, as set forth in claim 2, wherein said control cam or curve is a helically shaped groove (9).
4. Manually operated drilling and chipping tool, as set forth in claim 3, wherein said shifting member (7) has at least one part thereon engageable within the helically shaped groove (9).
5. Manually operated drilling and chipping tool, as set forth in claim 4, wherein the at least one part of the shifting member (7) comprises cams (7a) located in an outer circumferentially extending region of said shifting member (7).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4038395.4 | 1990-12-01 | ||
| DE4038395A DE4038395A1 (en) | 1990-12-01 | 1990-12-01 | DRILL AND CHISEL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2056545A1 true CA2056545A1 (en) | 1992-06-02 |
Family
ID=6419398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002056545A Abandoned CA2056545A1 (en) | 1990-12-01 | 1991-11-28 | Drilling and chipping apparatus |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0489687B1 (en) |
| JP (1) | JPH04269107A (en) |
| AT (1) | ATE91452T1 (en) |
| AU (1) | AU640541B2 (en) |
| CA (1) | CA2056545A1 (en) |
| DE (2) | DE4038395A1 (en) |
| DK (1) | DK0489687T3 (en) |
| ES (1) | ES2041554T3 (en) |
| FI (1) | FI915604A (en) |
| HU (1) | HUT60180A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4136584B4 (en) * | 1991-11-07 | 2004-10-28 | Hilti Ag | Drilling and chiseling device with tool holder |
| JP4552843B2 (en) * | 2005-12-09 | 2010-09-29 | パナソニック電工株式会社 | Hammer tool adapter |
| DE102005059182A1 (en) * | 2005-12-12 | 2007-06-14 | Robert Bosch Gmbh | Operating mode selector switch for setting at least one operating mode in a handheld power tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1195505A (en) * | 1967-07-31 | 1970-06-17 | Hilti Ag | Hammer Drill |
| JPS5930607A (en) * | 1982-08-12 | 1984-02-18 | Hitachi Koki Co Ltd | Electric hammer drill |
| DE3627869A1 (en) * | 1986-08-16 | 1988-02-18 | Bosch Gmbh Robert | DRIVE SHUTDOWN |
-
1990
- 1990-12-01 DE DE4038395A patent/DE4038395A1/en not_active Withdrawn
-
1991
- 1991-11-20 DE DE9191810904T patent/DE59100191D1/en not_active Expired - Fee Related
- 1991-11-20 DK DK91810904.2T patent/DK0489687T3/en active
- 1991-11-20 EP EP91810904A patent/EP0489687B1/en not_active Expired - Lifetime
- 1991-11-20 ES ES199191810904T patent/ES2041554T3/en not_active Expired - Lifetime
- 1991-11-20 AT AT91810904T patent/ATE91452T1/en not_active IP Right Cessation
- 1991-11-28 FI FI915604A patent/FI915604A/en not_active Application Discontinuation
- 1991-11-28 CA CA002056545A patent/CA2056545A1/en not_active Abandoned
- 1991-11-29 AU AU88317/91A patent/AU640541B2/en not_active Ceased
- 1991-11-29 HU HU913736A patent/HUT60180A/en unknown
- 1991-12-02 JP JP3318049A patent/JPH04269107A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0489687B1 (en) | 1993-07-14 |
| AU640541B2 (en) | 1993-08-26 |
| ES2041554T3 (en) | 1993-11-16 |
| DE59100191D1 (en) | 1993-08-19 |
| FI915604A (en) | 1992-06-02 |
| DK0489687T3 (en) | 1993-11-29 |
| HUT60180A (en) | 1992-08-28 |
| HU913736D0 (en) | 1992-03-30 |
| AU8831791A (en) | 1992-06-04 |
| DE4038395A1 (en) | 1992-06-04 |
| FI915604A0 (en) | 1991-11-28 |
| EP0489687A1 (en) | 1992-06-10 |
| ATE91452T1 (en) | 1993-07-15 |
| JPH04269107A (en) | 1992-09-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |