EP0655299A2 - Device for hand tools for driving tools - Google Patents

Device for hand tools for driving tools Download PDF

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Publication number
EP0655299A2
EP0655299A2 EP94117161A EP94117161A EP0655299A2 EP 0655299 A2 EP0655299 A2 EP 0655299A2 EP 94117161 A EP94117161 A EP 94117161A EP 94117161 A EP94117161 A EP 94117161A EP 0655299 A2 EP0655299 A2 EP 0655299A2
Authority
EP
European Patent Office
Prior art keywords
locking
tool
tool holder
characterized
locking body
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
Application number
EP94117161A
Other languages
German (de)
French (fr)
Other versions
EP0655299B1 (en
EP0655299A3 (en
Inventor
Alfred Dipl.-Ing. Odendahl
Heinz Dipl.-Ing. Neubert
Hans-Peter Dipl.-Ing. Meyen
Horst Sigg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE4340728 priority Critical
Priority to DE19934340728 priority patent/DE4340728C1/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0655299A2 publication Critical patent/EP0655299A2/en
Publication of EP0655299A3 publication Critical patent/EP0655299A3/en
Application granted granted Critical
Publication of EP0655299B1 publication Critical patent/EP0655299B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D17/00Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084Rotating chucks or sockets
    • B25D17/088Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2217/00Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003Details relating to chucks with radially movable locking elements
    • B25D2217/0034Details of shank profiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2217/00Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003Details relating to chucks with radially movable locking elements
    • B25D2217/0038Locking members of special shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2222/00Materials of the tool or the workpiece
    • B25D2222/54Plastics
    • B25D2222/57Elastomers, e.g. rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D2250/00General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/221Sensors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/17Socket type
    • Y10T279/17042Lost motion
    • Y10T279/17085Key retainer
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/17Socket type
    • Y10T279/17761Side detent
    • Y10T279/17811Reciprocating sleeve
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00Cutting by use of rotating axially moving tool
    • Y10T408/89Tool or Tool with support
    • Y10T408/907Tool or Tool with support including detailed shank

Abstract

A device is proposed on handheld power tools for the rotary driving of striking and / or drilling tools, at least two rotary driving grooves (23) open towards the shaft end and at least one locking recess (25) closed towards the shaft end being provided on the tool shaft (11), each of which engage a rotary driver (24) or a radially displaceable locking body (19) of the tool holder. To increase the rotational driving, it is provided that the locking recesses (25) in the tool shank (11) are lower in the front area than in the rear area, so that in the working position of the tool (12) the locking body (19) of the tool holder (16) assigned to it engages deeper in the front area of the locking recesses than in the idle position in the rear area. <IMAGE>

Description

    State of the art
  • The invention relates to a device on hand-held power tools for the rotary driving of striking and / or drilling tools according to the preamble of claim 1 and a tool and tool holder used in the process.
  • Such a device is known from DE-OS 25 51 125, the receiving bore of the tool holder having two mutually opposite rotary drive bars which engage in corresponding rotary drive grooves in the shank of the tools used here. In addition, there are two locking bodies that are also opposite each other, but offset from the rotary drive bars by about 90 ° , which engage radially in appropriately arranged, elongated recesses in the tool shank and secure the axially displaceable tool, for example a hammer drill or chisel, against falling out or unintentional pulling out.
  • Since this insert system known as "SDS-plus" is used for impact drills and rotary hammers as well as for tools of different performance that can be inserted into their tool holder, the required compatibility of the different tools results in a uniform shaft diameter and a uniform mounting hole of e.g. 10 mm. This has the disadvantage that more powerful tools with correspondingly powerful machines can only be used to a limited extent for continuous operation under full load, because the rotary drive wears out considerably in the process; because the torque is transmitted there only over two relatively narrow, opposite flanks of the rotary driving grooves and rotary driving bars - also called rotary drivers.
  • Advantages of the invention
  • Based on the fact that the shank diameter and the diameter of the tool holder are specified on the above-mentioned tools with a so-called "SDS-plus" insertion end and should be maintained with regard to compatibility, the device according to the invention for the driving of striking and / or drilling tools the characterizing features of claim 1 the advantage that the rotary driving is considerably improved by the at least one locking body, which now engages deeper in the working position at the front end of the locking troughs, so that the wear of the rotary driver is reduced even in the case of powerful machines and tools. Another significant advantage is that the improved tool shank with the characterizing features of claim 5 can be used not only for a tool holder with the characterizing features of claim 9 but also for machines with an "SDS-plus" tool holder without their impairment, i.e. is compatible. It is also advantageous that the axial locking of the tools is not impaired by the improved rotary driving and thus remains fully effective. In addition, the greater axial engagement length of the at least one locking body in the locking recess of the tool shaft compared to the locking balls used to date improves the tool guide, which is particularly advantageous when the tool is pushed away or levered sideways.
  • The measures listed in the subclaims result in advantageous developments and improvements to the features specified in patent claims 1, 5 and 9.
  • drawing
  • Several embodiments are shown in the drawing and explained in more detail in the following description. 1 shows a tool holder of a hammer drill with inserted tool in longitudinal section in an enlarged view, and FIG. 2 shows a cross section of the tool holder according to 11-11 from FIG. 1. As a further exemplary embodiment, FIG. 3 shows a cross section through a tool shaft according to 111-111 from FIG. 4 which together with FIG. 5 represent the insertion end of a tool shank with the depth of the locking recesses increasing linearly towards the front. Figure 6 shows a longitudinal section through an appropriately designed locking body together with the tool holder. FIG. 7 shows, as a further exemplary embodiment, a cross section through a tool holder with an inserted tool shaft, and FIG. 8 shows a tool shaft with a stepped depth of the locking recesses.
  • Description of the embodiments
  • The device according to the invention on machine tools for the rotary driving of striking and / or drilling tools, in particular on impact drills and hammer drills or impact devices, essentially consists of a tool holder 10 and a tool shaft 11 inserted therein of a tool 12 used for drilling and / or striking. In the first exemplary embodiment 1 and 2, the tool holder 10 is non-rotatably seated at the end of a driven, hollow cylindrical tool Spindle 13 of a hammer drill 14. A striker 15 is axially movably guided in the tool spindle and is cyclically struck on the end face of the tool shank 11 by a striking mechanism in a known manner, not shown. The tool holder 10 consists essentially of a tubular tool holder 16 with a receiving bore 17 for the tool shank 11 and two locking bodies 19 inserted into openings 18 of the tool holder 16. Above the locking bodies 19, a locking sleeve 20 is arranged concentrically to the tool holder 16, which is arranged by a Compression spring 21 locks the locking body 19 in the rest position shown. A rigidly connected to the locking sleeve 20 sliding sleeve 22 made of plastic, which concentrically surrounds the locking sleeve 20 and the compression spring 21, is axially displaceable by hand against the force of the compression spring 21, whereby the locking body 19 are released in their radial movement, so that they can move radially outwards when inserting the tool shank 11.
  • The tool 12 is provided on the tool shank 11 with two mutually opposite rotary driving grooves 23 which are open towards the shaft end and into which two axially extending rotary drivers 24 projecting inward in the receiving bore 17 (see FIG. 6) engage. The rotary drivers 24 are arranged 90 to the locking body 19 on the circumference of the tool holder 16. In a corresponding manner, two mutually opposite, axially extending locking troughs 25 on the circumference of the tool shaft 11 are offset by 90 to the rotary driving grooves 23 of the tool shaft 11. The locking troughs 25 already end in front of the rear end of the tool shaft 11, so that the locking bodies 19 engaging therein limit the axial movement of the tool 12 in the tool holder 16. After inserting the tool shaft 11 designed in this way into the tool holder 16, the sliding sleeve 22 is released again and the compression spring 21 now presses the locking sleeve 20 with the sliding sleeve 22 axially forward, so that the locking bodies 19 engage radially in the locking recesses 25 and from the locking sleeve 20 are locked in this position so that they secure the tool 12 against falling out.
  • To improve the rotational driving, the locking troughs 25 of the tool shank 11 are designed in their axial course such that they are deeper in the front area than in the rear area. In addition, the locking bodies 19 assigned to them are arranged radially displaceably in the tool holder 16 in such a way that they engage deeper into the locking troughs 25 at the front area of the locking troughs 25 - and thus in the working position of the tool 12 - than in the rear area, i.e. in the idle position. For this purpose, the locking bodies 19 are in their locked position by the locking sleeve 20 radially yielding out in the opening 18 of the tool holder 16 by a spring element 26 is arranged between a locking body 19 and the locking sleeve 20, which the locking body 19 radially pushes inwards. This ensures that in the working position by pressing the tool 12 against a material or workpiece to be machined, the tool shank 11 is pushed back into the tool holder 16 and that the locking body 19 in the front region of the locking recesses 25 to improve the rotational driving deeper immerse the tool shank 11 as in the idle position, in which the tool 12 is partially pulled out of the tool holder 10 or is struck forward by the striker 15 by an idling stroke until the locking bodies 19 rest against the rear end of the locking recesses 25 and the tool 12 Secure against falling out.
  • Since the tool 12 is thrown forward by so-called idle strokes, considerable mechanical stresses occur in particular in the case of heavier tools on the rear end face of the locking body 19 which dips into the locking troughs 25 and at the ends of the locking troughs 25, which increase as the depth of the locking troughs 25 increases Can expand or mushroom the end of the tool shank. The tool then jams in the tool holder 16 and is therefore unusable. In order to avoid this, the locking troughs 25 are made flatter in their rear area, which is used in the idle position, ie less deep than in their front area, which is used in the working position. From Figure 1 it can be seen that the depth of the locking troughs 25 increases only in the rear area, approximately up to half of their axial length and remains the same depth in the front area. Furthermore, it can be seen that the locking bodies 19 are longer than wide or approximately half as long as the locking troughs 25 and, viewed in the axial direction, are of the same height and the same thickness except for the rounded ends. From Figure 2 it can be seen that the locking troughs have an axially extending flat flank 27 with increasing depth on their long sides, which with a corresponding axially extending flat flank 28 on the long sides of the locking body 19 to form the additional rotation take along. This increases the area or flank for the additional rotary drive compared to previously used locking balls or rollers not only by a deeper immersion, but also by the length of the contact shoulder, so that the pressure on the rotary driving surfaces is reduced.
  • For the additional rotary driving, such a flank is only required on the side of the locking troughs 25 and the locking body 19 lying in the direction of rotation. On the opposite longitudinal side, on the other hand, a different design is possible both in this and in the other exemplary embodiments, provided that the engagement of the locking bodies 19 in their locking recesses 25 is not hindered thereby. In the example, however, the flat flanks 27 and 28 of the two long sides of the locking troughs 25 and the locking body 19 each run parallel to one another. It can also be seen from FIG. 2 that the locking bodies 19 have a hump-shaped, radially inner side that extends in the axial direction and is delimited by the flanks 28 running parallel to one another on the long sides of the locking bodies 19.
  • FIGS. 3 to 6 show a further exemplary embodiment of a device according to the invention for a rotary hammer for the rotary driving of percussion drilling tools. FIG. 3 shows a cross section through the tool shaft 11 of a tool 12a in the rear end region of the locking recesses 25a. In a cutout of the tool shank 11 a shown in FIG. 4 it can be seen that the depth of the locking recesses 25 a increases linearly from the rear to the front end in this exemplary embodiment. The tool shank 11 shown rotated by 90 in FIG. 5 also shows that the locking troughs 25a remain the same width over their entire axial length, so that flanks 27a for an additional turning take place also with increasing depth of the locking troughs.
  • As an alternative to the embodiment according to FIG. 1, only one locking body 19a is provided on the tool holder 16a in FIG. 6, which may be sufficient for weaker machine tools, especially since this solution is less expensive. In adaptation to the locking troughs 25a, the locking body 19a is designed here or arranged in the tool holder 16a in such a way that the area of the locking body 19a engaging in the locking troughs 25a protrudes axially towards the inside to an increasing extent from the receiving bore 17a as the depth the locking troughs 25 increases. Here, too, the locking body 19a in the position shown, locked by the locking sleeve 20, is guided by the spring element 26 radially outward in the opening 18 to the extent that the locking body 19a as the tool shaft slides forward from the (rising in the axial direction) bottom of the locking trough 25a is pressed radially outward until it finally abuts the locking sleeve 20 in the end region of the locking recess 25a.
  • In order to obtain the longest possible axial contact surface on the flanks 27 of the locking body 19 and locking recesses 25 for the additional rotary driving, but on the other hand not to increase the shank length of the tool 12 as a result, it is provided that the rotary drivers 24 and the locking bodies 19 and 19a Start at the same height in the receiving bore 17 or 17a of the tool holder and engage in the rotary driving grooves 23 and locking recesses 25 which also start at the same height of the tool shank 11 or 11. In this embodiment, the locking bodies 19 and 19a can be selected considerably longer than in the previous tool holders, but at least half as long as the locking troughs 25 and 25a.
  • A third exemplary embodiment of the device according to the invention is shown in FIG. 7, which shows a cross section through a tool holder 10b with a tool shank 11 of a tool inserted therein. At the bottom of the locking trough 25b, which can be seen to become deeper towards the front in FIG. 4, a longitudinal groove 29 is also incorporated here, into which a strip 30 engages as an additional rotary drive on the inwardly directed end face of the locking body 19b projecting further inwards according to FIG. 6 . As in the previous exemplary embodiments, the locking bodies 19b are each seated in a radial opening 18 in the tool holder 16, which is concentrically surrounded by a locking sleeve 20a. As a spring element between the locking body 19b and the locking sleeve 20a, a solid body 26a is provided in the opening 18 of the tool holder 16, which is made of an elastically deformable material such as rubber, plastic and the like. By means of the locking sleeve 20a, the locking bodies 19b are thus also locked radially elastically in the working position shown via the solid bodies 26a. The locking bodies 19b rest against the shaft 11b of the tool inserted into the tool holder 16 with a defined pressure by means of the compressed solid body 26a. This pressure dampens the relative movement of the tool when idling. The solid body 26a thus simultaneously serves as a damping body for the axial forward movement of the tool when the machine is idling. To unlock, the locking sleeve is rotated in the direction of the arrow, preferably in the direction of rotation of the tool, relative to the tool holder 16 until a correspondingly wide and deep recess 31 on the inside of the locking sleeve 20a passes over the respective solid body 26a, so that the latter can escape to the outside and release the locking body 19b. In this position, the tool shank 11 b can be pushed into the tool holder 16 or pushed out of it.
  • The radial immersion movement of the locking bodies when engaging in the tool shank can also be used to control the impact performance of the hammer drill depending on the tool type, in that the locking recesses are designed to have different depths depending on the tool type. Either the immersion depth of a locking body can be sensed by a sensor or, as in the exemplary embodiment according to FIG. 7, the pressure of the spring element designed as a solid body 26a on the locking body 19b for controlling the impact strength of the machine tool can be recorded by a sensor 32, which is shown, for example, in FIG 7 is attached to the inside of the locking sleeve 20a. The sensor 32 acts on the impact strength of the machine tool via electronics, not shown. The solution principle realized with the solid bodies 26a can of course also be implemented with an axially displaceable locking sleeve 20 with a corresponding axial arrangement of the recesses 31.
  • As can be seen from Figure 4, the longitudinal axis of the locking troughs 25a is inclined relative to the axis of rotation of the tool 12a, i.e. towards the front, the locking troughs 25a become deeper. Deviating from this, the locking troughs can also be divided into sections of different depths. In the exemplary embodiment according to FIG. 8 it is shown that the locking troughs 25c of the tool shank 11 have two sections of different depths, the rear, flat section 33 smoothly merging into the front, lower section 34 by means of an inclined ramp 35. The work intervention of the tool is coded via these stages. If a drilling or chiseling tool comes into engagement in the tool holder, the locking body 19 engages in the deeper section 34 in the working position of the tool and thus ensures better rotational driving. At the same time, the impact performance of the machine tool can be adjusted by the immersion depth of the locking body as described in FIG. 7. The constructive design of the ramp at the step transition of the locking recess 25c between the idle position and the working position ensures a smooth transition to impact operation. In addition to a straight line, the ramp can also be designed in the form of a curve.
  • The invention is not restricted to the exemplary embodiments shown. Essential to the invention, however, is an improved rotational driving by a locking body 19, 19a, 19b engaging deeper in the front section of the locking troughs 25, 25a, 25b, 25c; the flanks 27 and 28 can also be formed radially or wedge-shaped on their sides or curved according to FIG. 7.

Claims (14)

1.Device on hand-held power tools for rotary driving of impacting and / or drilling tools, which have open grooves for rotary driving towards their shaft end, in which engage at least two axially extending, preferably diametrically opposite rotary drivers which protrude inwards in a receiving bore of a tool holder, wherein In a circumferential area of the receiving bore offset from the rotary drivers, at least one locking body, which yields to the outside in a radial breakthrough of the tool holder, engages in an elongated locking recess in the tool shaft that limits the axial movement of the tool in the tool holder and can be locked in this position, characterized in that the at least one locking trough (25) of the tool shaft (11) is designed in its axial extent such that it is deeper in the front area than in the rear area, so that in the working position of the tool gs (12) the locking body (19) of the tool holder (16) assigned to it engages deeper in the front region of the locking recess (25) than in the idle position in the rear region.
2. Device according to claim 1, characterized in that the depth of the at least one locking trough (25) increases linearly from the rear to the front end and that the area of the locking body (19) engaging therein increases axially to the same extent towards the front from the receiving bore ( 17) protrudes radially inwards.
3. Device according to claim 1, characterized in that the depth of the at least one Locking trough (25) increases only in the rear area, preferably up to half the axial length towards the front and remains the same in the front area, and that the at least one locking body (19), viewed in the axial direction, is of the same height and width except for its rounded ends .
4. Device according to one of claims 1 to 3, characterized in that the at least one locking trough (25) with increasing depth on its longitudinal sides in the direction of rotation has an at least approximately axially extending flat flank (27) which with a corresponding axially extending flat flank (28) on the long sides of the locking body (19) cooperates to form an additional rotary drive.
5. Tool for a device according to the preamble of claim 1, characterized in that the depth of the at least one locking trough (25) of the tool shank (11) increases from the rear to the front end and on its longitudinal side, in particular in the direction of rotation, with increasing depth has at least approximately axially extending flat flank (27) for additional rotary driving.
6. Tool according to claim 5, characterized in that two flat flanks (27) on both longitudinal sides of the at least one locking trough (25) run parallel to one another.
7. Tool according to claim 5 or 6, characterized in that the depth of the at least one locking trough (25) increases preferably from the rear end to the center and remains the same from there to the front end.
8. Tool according to claim 5 or 6, characterized in that the locking recess (25c) has at least two sections of different depths, the rear flat section (33) merging smoothly into the front lower section (34).
9. Tool holder for a device according to the preamble of claim 1, characterized in that the at least one locking body (19) in its locked position is yielding radially outwards in a recess (18) of the tool holder (16).
10. Tool holder according to claim 9, characterized in that the at least one locking body (19) is longer than wide in the axial direction, the longitudinal sides of which extend as mutually parallel flanks (28) into a hump-shaped curved radial inside.
11. Tool holder according to claim 9 or 10, characterized in that between the at least one locking body (19) and a locking device (20) a spring element (26) is arranged which presses the locking body (19) radially inwards.
12. Tool holder according to claim 11, characterized in that the spring element (26a) consists of a solid body made of rubber, plastic or a similarly elastically deformable material.
13. Tool holder according to one of claims 9 to 12, characterized in that the immersion depth of the at least one locking body (19) for controlling the impact strength of the machine tool (14) can be sensed.
14. Tool holder according to claim 11 or 12, characterized in that the pressure of the spring element (26a) on the locking body (19b) for controlling the impact strength of the machine tool by a sensor (32) can be recorded.
EP19940117161 1993-11-30 1994-10-31 Device for hand tools for driving tools Expired - Lifetime EP0655299B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE4340728 1993-11-30
DE19934340728 DE4340728C1 (en) 1993-11-30 1993-11-30 Device on powered hand tools for the rotary driving of tools

Publications (3)

Publication Number Publication Date
EP0655299A2 true EP0655299A2 (en) 1995-05-31
EP0655299A3 EP0655299A3 (en) 1995-09-06
EP0655299B1 EP0655299B1 (en) 1999-04-28

Family

ID=6503774

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940117161 Expired - Lifetime EP0655299B1 (en) 1993-11-30 1994-10-31 Device for hand tools for driving tools

Country Status (6)

Country Link
US (1) US5558478A (en)
EP (1) EP0655299B1 (en)
JP (1) JPH07185913A (en)
CN (1) CN1046879C (en)
DE (1) DE4340728C1 (en)
DK (1) DK0655299T3 (en)

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Also Published As

Publication number Publication date
CN1107768A (en) 1995-09-06
EP0655299A3 (en) 1995-09-06
JPH07185913A (en) 1995-07-25
DK0655299T3 (en) 1999-11-08
US5558478A (en) 1996-09-24
DK655299T3 (en)
CN1046879C (en) 1999-12-01
DE4340728C1 (en) 1995-01-26
EP0655299B1 (en) 1999-04-28

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