GB1566855A - Drill chuck - Google Patents

Drill chuck Download PDF

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Publication number
GB1566855A
GB1566855A GB1697178A GB1697178A GB1566855A GB 1566855 A GB1566855 A GB 1566855A GB 1697178 A GB1697178 A GB 1697178A GB 1697178 A GB1697178 A GB 1697178A GB 1566855 A GB1566855 A GB 1566855A
Authority
GB
United Kingdom
Prior art keywords
toothed ring
latching members
latching
ring
tooth
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.)
Expired
Application number
GB1697178A
Original Assignee
Roehm Guenter H
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 DE19782806797 priority Critical patent/DE2806797C2/de
Application filed by Roehm Guenter H filed Critical Roehm Guenter H
Publication of GB1566855A publication Critical patent/GB1566855A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B31/00Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02Chucks
    • B23B31/10Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/123Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis with locking arrangements

Abstract

The drill chuck consists of a chuck body (1), a gripping sleeve (2) rotatable thereon and gripping jaws (7) adjustable by the gripping sleeve. In order to rule out the possibility of unintentional loosening of the chucked drilling tool by vibrations, in particular in tough percussion-drilling operation, a catch device prevents the gripping sleeve (2) from being able to turn relative to the chuck body (1) in such a direction as to release the gripping jaws (7) during operation of the drill chuck. The catch device consists of a toothed rim (14) in which catch members (16) engage under spring force. The catch members (16) follow one another along the toothed rim (14) at a distance apart which is slightly smaller than the tooth spacing on the toothed rim (14) so that the catch positions, in which locking engagement of at least one of the catch members (16) on one of the teeth of the toothed rim (14) occurs, follow one another substantially closer than the tooth spacing on the toothed rim (14). For the intentional release of the chuck, all the catch members (16) can be simultaneously disengaged from the toothed rim (14) by means of a common adjusting member (17). <IMAGE>

Description

(54) DRILL CHUCK (71) I, GAUNTER HORST RÖHM, a German Citizen, of Heinrich-Röhm-Str. 50, 7927 Sontheim, Germany, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the follow mg statement: The invention relates to a drill chuck, provided with a body, a clamping sleeve mounted co-axially and rotatably on the body, clamping jaws in a conical guide co-axial with the body and arranged to be moved along the guide for clamping and releasing purposes, as a result of relative rotation between the body and clamping sleeve.

Drill chucks of this kind are known in various forms (cf. for example German Utility Model 72 22 008, German Utility Model 75 24 037, German Patent Specification laid open to inspection 21 33 142, German Patent Specification laid open to inspection 26 39 214). They have given a good account of themselves in practice.

However, difficulties can arise if such drill chucks are used for impact drilling, since the vibration which may in some circumstances occur in this case can cause the clamping sleeve to move in relation to the body of the chuck, with resultant loosening of the clamping action on the drilling tool between the camping jaws, so that no torque can be exerted between tool and chuck in the absence of after-clamping (i.e. holding the tool by means of an abutment).

The invention is based on the problem of so designing a drill chuck of the kind defined in the opening paragraph of this specification in which the danger of unintended )loosening of the clamping action on the drilling tool is avoided, even in the case of a bard impact-drilling operation.

According to the invention a drill chuck comprises a body having a longitudinal axis along which the chuck is operative when the chuck is in use, a clamping sleeve mounted co-axially and rotatably on the body, clamping jaws in a frusto-conical guide co-axial with the body and arranged to move along the guide for clamping and releasing purposes, as a result of relative relation about said axis between the body and the clamping sleeve, a toothed ring co-axial dwith said axis, a series of spring-loaded latching members distributed around said axis in positions to engage the teeth on the toothed ring, and such that they are spaced along the toothed ring at a distance which is always greater or less by a fraction of the pitch of the teeth on the ring than an integral multiple of the tooth-pitch and the latching members being arranged to engage the toothed ring so as to lock the body and the clamping ring against relative rotation in the sense of releasing the clamping jaws from a clamped tool but to allow relative rotation to take place in the sense of tightening the jaws on a tool, and a setting member common to all the latching members for simultaneously withdrawing them from their engagement with the toothed ring.

Very advantageously, the fraction of the tooth-distance by which the distance between consecutive latching members is greater or less than an integral multiple of the tooth-pitch, is equal to the reciprocal of the total number of all the latching members, so that the distance between consecutive locking latching positions of the latching device is equal to the fraction of a tooth-pitch on the toothed ring given by the total number of all the latching members.

As a result, the invention first of all ensures that the clamping sleeve cannot rotate in the sense of releasing the clamping jaws while the drill chuck is in operation, since the latching device locks the clamping sleeve against such rotation without hindering opposite rotation and thus after clamping of the clamping jaws. As a result of the mutually differing division ratio in the arrangement of the teeth of toothed ring on the one hand and of the latching members on the other hand, the latching positions in which at least one of the latching members comes into locking engagement with one of the teeth are considerably closer together than the tooth-pitch on the toothed ring, the closeness increasing with the number of latching members. On the one hand therefore the distance between consecutive latching positions with a locking engagement may readily be made so small that rotation from one latching position to the next within the stiffness of the chuck remains practically without effect on the clamping action on the drilling tool, but on the other hand the tooth-pitch and thus the tooth size itself may be made so great that sufficiently large surfaces are available for the latching members to come to bear in locking fashion on the teeth, so that the chuck will be securely restrained from any loosening of the clamping action, even if the restraint is carried out in each case only by one of the latching members on one of the teeth.

A preferred form of embodiment of the invention is characterised in that the latching members are latching studs guided parallel to the axis of the chuck, their heads being of saw-tooth shape and the teeth of the toothed ring being similarly formed, so that the latching members and the teeth of the toothed ring slide over one another on their oblique surfaces when relative rotation takes place between the body of the chuck and the clamping sleeve in the sense of tightening the clamping jaws, but that they lock on one another by way of their steep surfaces when rotation takes place in the opposite direction. The toothed ring is expendiently fixed to the body and the latching members are arranged in the clamping sleeve, and abut in the direction of their engagement in the toothed ring, against a setting ring which constitutes the setting member and which is capable of axial movement on the clamping sleeve. In detail, the setting ring constituting the setting member may for this purpose overlap by way of internal flange shoulders on the latching studs constituting the latching members, and be guided by way of a sleeve portion on the clamping sleeve. The sleeve portion is preferably rotatable between two end limiting positions, in one of which the latching members are freed for the purpose of engaging the toothed ring, and in the other of which the internal flange is axially withdrawn so far that the latching members abutting against the internal flange are held out of engagement with the toothed ring.

The invention is more precisely explained hereinafter with reference to an example shown in the accompanying drawings, wherein: Figure 1 shows an after-clamping drill chuck in lateral elevation on the right hand side of the drawing and in longitudinal section on the left hand side of the drawing, and Figure 2 shows a transverse section in the direction II - II through the drill chuck of Figure 1.

Referring to the drawings, the chuck has a body 1 and a clamping sleeve 2 mounted co-axially therewith and rotatably thereon.

For the purpose of mounting the clamping sleeve 2, the body 1 of the chuck comprises an annular flange 3 which is axially enclosed between an annular shoulder 4 on the clamping sleeve 2 on the one hand and rolling members 5 on the other hand which are secured by a threaded ring 6 screwed into the clamping sleeve 2. A threaded bore 7' in the body 1 of the chuck is provided for receiving the drill spindle, not illustrated.

Clamping jaws 7 are arranged in slots 8 in the clamping sleeve 2, and are movable in a conical guide in a clamping cone 9 which in this example is screwed to the clamping sleeve by way of threads 1(). As a result of the clamping jaws 7 being guided in the slots 8 in the clamping sleeve 2, any torque transmitted from the drilling tool, not illustrated, to the clamping jaws 7 is correspondingly transmitted to the clamping sleeve 2.

In the example, the clamping jaws 7 are rearwardly supported against an afterclamping abutment 11, on a threaded stud 12 in a central threaded bore 13 in the body 1 of the chuck. The abutment 11 and thus the threaded stud 12 are arranged to rotate, with respect to the body 1 of the chuck, together with the clamping sleeve 2 and the clamping jaws 7. If the clamping sleeve 2 is rotated with respect to the body 1 the abutment 11 is correspondingly rotated so that axial forward or backward movement is imparted to the threaded stud 12 by the screw-thread in the bore 13. The direction of movement is according to the direction of rotation, leading in the first case to the clamping jaws 7 being tightened by the abutment 11 and in the second case to their being released by the abutment 11.

In order to prevent any rotation between the body 1 of the chuck and the clamping sleeve 2 when there is a tool clamped in position, possibly leading to the clamping action being loosened, there is a latching device between the body 1 of the chuck and the clamping sleeve 2, consisting essentially on the one hand of a toothed ring 14 co-axial with the chuck, and on the other hand of latching members 16 engaging under the force of springs 15 in the toothed ring 14.

The latching members 16 follow one another along the toothed ring 14 at a distance which, as may be seen from Figure 2, is always greater or less by a fraction of the tooth-pitch on the toothed ring 14 than an integral multiple of this tooth-pitch. The latching members 16 engaging the toothed ring 14 lock the body 1 of the chuck and the clamping sleeve 2 against relative rotation in the sense of releasing the clamping jaws 7, but allow relative rotation to take place unhindered in the sense of tightening the jaws. In addition, there is a setting member 17, common to all the latching members 16 which enables the latching members 16 to be simultaneously withdrawn from their engagement in the toothed ring 14. In this example, the arrangement in detail is such that the fraction of the tooth-pitch by which the distance between consecutive latching members 16 is greater or less than an integral multiple of the tooth-pitch is equal to the reciprocal of the total number of all the latching members. The distance between consecutive locking latching positions of the latching device is therefore equal to the fraction of a tooth-pitch on the toothed ring 14 the distance being determined by the total number of all the latching members. In this example, there are six latching members altogether, so that the latching positions in which at least one of the latching members 16 comes to bear in locking fashion against one of the teeth on the toothed ring 14 amounts to one sixth of the tooth-pitch on the toothed ring. The latching positions in which the clamping sleeve 2 can be restrained with respect to the body 1 of the chuck are thus considerably closer to one another than the pitch of the teeth on the ring 14. The tooth-pitch and thus the tooth size may accordingly be made considerably greater than the distance between consecutive restraining latching positions, so that there are sufficiently large bearing areas between the latching members 16 and the teeth of the toothed ring 14, ensuring secure restraint even if the locking action results only from one latching member 16 coming to bear against one of the teeth of the toothed ring 14.

In this example, the latching members 16 are latching studs guided parallel to the axis of the chuck, in blind bores in the clamping sleeve 2 containing the latching springs 15, the latchings springs 15 bearing against the bases of the blind bores 18. The heads of the latching members 16 have a saw-tooth shape the same as the shape of the teeth of the toothed ring 14. The latching members 16 and the teeth of the toothed ring 14 can therefore slide over one another on their oblique surfaces 19 when relative rotation occurs between the body 1 and the clamping sleeve 2 in the sense of tightening the clamping jaws 7. No locking occurs in this direction, but in the opposite direction movement is restrained by the steep surfaces 20 of the saw-tooth shapes of the stud heads and teeth on the ring 14.

The toothed ring 14 is on the underside of a radially slotted pinch-ring 22 which is non-rotatably clamped by a clamping screw 21 on the body 1 of the chuck, and which is thus fast with said body. Shoulders 16.1 on the latching members 16 abut, in the direction in which they engage the toothed ring 14, against an internal flange 17.1 on a setting ring 17 which is axially movable on the clamping sleeve 2. The setting ring 17 is guided on the clamping sleeve 2 by way of a sleeve portion 17.2 which can be rotated between two limiting positions, in one of which as - in Figure 1 - the latching members 16 are freed for the purpose of engaging in the toothed ring 14, while in the other limiting position the internal flange 17.1 is axially withdrawn so far that the latching members 16 abutting against the internal flange 17.1 are held out of engagement with the toothed ring 14. Axial movement is imparted to the setting ring 17 depending on its direction of rotation, as a result of the fact that the clamping sleeve 2 carried guide pins 24 distributed around its periphery and projecting into oblique slots 23 in the sleeve portion 17.2. If the setting member 17 is rotated. it undergoes simultaneous axial displacement corresponding to the inclination of the oblique slots 23.

WHAT I CLAIM IS: 1. A drill chuck comprising a body having a longitudinal axis along which the chuck is operative when the chuck is in use, a clamping sleeve mounted co-axially and rotatably on the body, clamping jaws in a frusto-conical guide co-axial with the body and arranged to move along the guide for clamping and releasing purposes, as a result of relative rotation about said axis between the body and the clamping sleeve, a toothed ring co-axial with said axis, a series of spring-loaded latching members distributed around said axis in positions to engage the teeth on the toothed ring, and such that they are spaced along the toothed ring at a distance which is always greater or less by a fraction of the pitch of the teeth on the ring than an integral multiple of the tooth-pitch and the latching members being arranged to engage the toothed ring so as to lock the body and the clamping ring against relative rotation in the sense of releasing the clamping jaws from a clamped tool but to allow relative rotation to take place in the sense of tightening the jaws on a tool, and a setting member common to all the latching members for simultaneously withdrawing them from their engagement with the toothed ring.

2. A drill chuck according to Claim 1, in which the fraction of the tooth-distance by

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. distance which, as may be seen from Figure 2, is always greater or less by a fraction of the tooth-pitch on the toothed ring 14 than an integral multiple of this tooth-pitch. The latching members 16 engaging the toothed ring 14 lock the body 1 of the chuck and the clamping sleeve 2 against relative rotation in the sense of releasing the clamping jaws 7, but allow relative rotation to take place unhindered in the sense of tightening the jaws. In addition, there is a setting member 17, common to all the latching members 16 which enables the latching members 16 to be simultaneously withdrawn from their engagement in the toothed ring 14. In this example, the arrangement in detail is such that the fraction of the tooth-pitch by which the distance between consecutive latching members 16 is greater or less than an integral multiple of the tooth-pitch is equal to the reciprocal of the total number of all the latching members. The distance between consecutive locking latching positions of the latching device is therefore equal to the fraction of a tooth-pitch on the toothed ring 14 the distance being determined by the total number of all the latching members. In this example, there are six latching members altogether, so that the latching positions in which at least one of the latching members 16 comes to bear in locking fashion against one of the teeth on the toothed ring 14 amounts to one sixth of the tooth-pitch on the toothed ring. The latching positions in which the clamping sleeve 2 can be restrained with respect to the body 1 of the chuck are thus considerably closer to one another than the pitch of the teeth on the ring 14. The tooth-pitch and thus the tooth size may accordingly be made considerably greater than the distance between consecutive restraining latching positions, so that there are sufficiently large bearing areas between the latching members 16 and the teeth of the toothed ring 14, ensuring secure restraint even if the locking action results only from one latching member 16 coming to bear against one of the teeth of the toothed ring 14. In this example, the latching members 16 are latching studs guided parallel to the axis of the chuck, in blind bores in the clamping sleeve 2 containing the latching springs 15, the latchings springs 15 bearing against the bases of the blind bores 18. The heads of the latching members 16 have a saw-tooth shape the same as the shape of the teeth of the toothed ring 14. The latching members 16 and the teeth of the toothed ring 14 can therefore slide over one another on their oblique surfaces 19 when relative rotation occurs between the body 1 and the clamping sleeve 2 in the sense of tightening the clamping jaws 7. No locking occurs in this direction, but in the opposite direction movement is restrained by the steep surfaces 20 of the saw-tooth shapes of the stud heads and teeth on the ring 14. The toothed ring 14 is on the underside of a radially slotted pinch-ring 22 which is non-rotatably clamped by a clamping screw 21 on the body 1 of the chuck, and which is thus fast with said body. Shoulders 16.1 on the latching members 16 abut, in the direction in which they engage the toothed ring 14, against an internal flange 17.1 on a setting ring 17 which is axially movable on the clamping sleeve 2. The setting ring 17 is guided on the clamping sleeve 2 by way of a sleeve portion 17.2 which can be rotated between two limiting positions, in one of which as - in Figure 1 - the latching members 16 are freed for the purpose of engaging in the toothed ring 14, while in the other limiting position the internal flange 17.1 is axially withdrawn so far that the latching members 16 abutting against the internal flange 17.1 are held out of engagement with the toothed ring 14. Axial movement is imparted to the setting ring 17 depending on its direction of rotation, as a result of the fact that the clamping sleeve 2 carried guide pins 24 distributed around its periphery and projecting into oblique slots 23 in the sleeve portion 17.2. If the setting member 17 is rotated. it undergoes simultaneous axial displacement corresponding to the inclination of the oblique slots 23. WHAT I CLAIM IS:
1. A drill chuck comprising a body having a longitudinal axis along which the chuck is operative when the chuck is in use, a clamping sleeve mounted co-axially and rotatably on the body, clamping jaws in a frusto-conical guide co-axial with the body and arranged to move along the guide for clamping and releasing purposes, as a result of relative rotation about said axis between the body and the clamping sleeve, a toothed ring co-axial with said axis, a series of spring-loaded latching members distributed around said axis in positions to engage the teeth on the toothed ring, and such that they are spaced along the toothed ring at a distance which is always greater or less by a fraction of the pitch of the teeth on the ring than an integral multiple of the tooth-pitch and the latching members being arranged to engage the toothed ring so as to lock the body and the clamping ring against relative rotation in the sense of releasing the clamping jaws from a clamped tool but to allow relative rotation to take place in the sense of tightening the jaws on a tool, and a setting member common to all the latching members for simultaneously withdrawing them from their engagement with the toothed ring.
2. A drill chuck according to Claim 1, in which the fraction of the tooth-distance by
which the distance between consecutive latching members is greater or less than an integral multiple of the tooth-pitch, is equal to the reciprocal of the total number of all the latching members, so that the distance between consecutive locking latching positions of the latching device is equal to the fraction of a tooth-pitch on the toothed ring given by the total number of all the latching members.
3. A drill chuck according to Claim 1 or Claim 2, in which the latching members are latching studs guided parallel to the said axis, their heads being of saw-tooth shape and the teeth of the toothed ring being similarly formed so that the latching members and the teeth of the toothed ring slide over one another on their oblique surfaces when relative rotation takes place between the body and the clamping sleeve in the sense of tightening the clamping jaws, but that they lock on one another by way of their steep surfaces when the rotation takes place in the opposite direction.
4. A drill chuck according to any one of Claims 1 to 3, in which the toothed ring is fixed to the body and the latching members are located in the clamping sleeve and. abut, in the direction in which they engage the toothed ring against a setting ring which constitutes the setting member and which is arranged for axial movement on the clamping sleeve for the purposes of withdrawing the latching members from the ring.
5. A drill chuck according to Claim 4, in which the setting ring constituting the set- ting member has an internal flange that overlaps shoulders on the latching members and, has a sleeve portion which is guided on the periphery of the clamping sleeve.
6. A drill chuck according to Claim 5, in which the sleeve portion is rotatable between two limiting positions, in one of which the latching members are freed for the purpose of engaging in the toothed ring, and in the other of which the internal flange is axiallv withdrawn so that the latching members abutting against the internal flange are held out of engagement with the toothed ring.
7. A drill chuck substantially as hereinbefore described with reference to the accompanying drawings.
GB1697178A 1978-02-17 1978-04-28 Drill chuck Expired GB1566855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782806797 DE2806797C2 (en) 1978-02-17 1978-02-17

Publications (1)

Publication Number Publication Date
GB1566855A true GB1566855A (en) 1980-05-08

Family

ID=6032249

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1697178A Expired GB1566855A (en) 1978-02-17 1978-04-28 Drill chuck

Country Status (7)

Country Link
JP (1) JPS6219964B2 (en)
CH (1) CH635767A5 (en)
DE (1) DE2806797C2 (en)
FR (1) FR2417363B1 (en)
GB (1) GB1566855A (en)
IT (1) IT1118374B (en)
NL (1) NL185902C (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621819A (en) * 1983-09-27 1986-11-11 Roehm Guenter H Nonloosening hammer-drill chuck
GB2189723A (en) * 1986-04-28 1987-11-04 Matsushita Electric Works Ltd Tool gripping chuck
GB2209494A (en) * 1987-09-05 1989-05-17 Metabowerke Kg Drilling chuck
US4836563A (en) * 1987-08-14 1989-06-06 Roehm Guenter H Selftightening drill chuck
US4848779A (en) * 1987-04-02 1989-07-18 Black & Decker Inc. Keyless chuck
US5158306A (en) * 1990-07-21 1992-10-27 Roehm Guenter H Drill chuck
US5174588A (en) * 1990-02-23 1992-12-29 Robert Bosch Gmbh Automatically locking chuck for drill or the like
US5195760A (en) * 1990-06-12 1993-03-23 Black & Decker Inc. Keyless chuck
WO2017051232A1 (en) * 2015-09-22 2017-03-30 Llambrich Precisón, S.L. Chuck with locking device

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2847927C2 (en) * 1978-11-04 1986-10-16 Guenter Horst 7927 Sontheim De Roehm
DE3132449C2 (en) * 1981-08-17 1994-10-27 Hilti Ag Tool holder for rotary hammers
DE3338141C2 (en) * 1983-10-20 1992-06-04 Guenter Horst 7927 Sontheim De Roehm
DE3338067C2 (en) * 1983-10-20 1993-05-06 Guenter Horst 7927 Sontheim De Roehm
DE3405511C1 (en) * 1984-02-16 1985-07-11 Roehm Guenter H Chuck, especially drill chuck
DE3406668C2 (en) * 1984-02-24 1987-04-30 Guenter Horst 7927 Sontheim De Roehm
DE3413581C2 (en) * 1984-04-11 1986-08-14 Guenter Horst 7927 Sontheim De Roehm
DE3422195C2 (en) * 1984-06-15 1987-04-09 Guenter Horst 7927 Sontheim De Roehm
DE3561046D1 (en) * 1984-06-15 1988-01-07 Roehm Guenter H Drill chuck
DE3424679C2 (en) * 1984-07-05 1993-08-05 Hilti Ag, Schaan, Li
DE3425736A1 (en) * 1984-07-12 1986-01-16 Metabowerke Kg Drill chuck for percussion drills and/or rotary drills
DE3432918C2 (en) * 1984-09-07 1989-11-09 Guenter Horst 7927 Sontheim De Roehm
JPH0325282B2 (en) * 1986-01-21 1991-04-05 Matsushita Electric Works Ltd
DE3609339C2 (en) * 1986-03-20 1994-08-25 Bosch Gmbh Robert Drill chuck
EP0413046B1 (en) * 1989-08-18 1993-04-14 Günter Horst Röhm Self-clamping drill chuck
DE4238464C1 (en) * 1992-11-16 1994-03-03 Roehm Guenter H Self-tightening drill chuck
JP4725043B2 (en) * 2004-07-02 2011-07-13 村田機械株式会社 Loader device and setup change method thereof
CN205834284U (en) * 2016-05-20 2016-12-28 浙江三鸥机械股份有限公司 A kind of novel Self-locking drill-chuck

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE344303C (en) * 1920-11-29
DE2432011B2 (en) * 1974-07-03 1976-11-18 Waermebeweglichen arrangement for storage of a reactor pressure vessel
DE2639214C3 (en) * 1976-08-31 1979-03-22 Guenter Horst 7927 Sontheim Roehm

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621819A (en) * 1983-09-27 1986-11-11 Roehm Guenter H Nonloosening hammer-drill chuck
GB2189723A (en) * 1986-04-28 1987-11-04 Matsushita Electric Works Ltd Tool gripping chuck
GB2189723B (en) * 1986-04-28 1990-10-17 Matsushita Electric Works Ltd Tool gripping chuck
US4848779A (en) * 1987-04-02 1989-07-18 Black & Decker Inc. Keyless chuck
US4836563A (en) * 1987-08-14 1989-06-06 Roehm Guenter H Selftightening drill chuck
GB2209494A (en) * 1987-09-05 1989-05-17 Metabowerke Kg Drilling chuck
GB2209494B (en) * 1987-09-05 1992-04-08 Metabowerke Kg Drilling chuck
US5174588A (en) * 1990-02-23 1992-12-29 Robert Bosch Gmbh Automatically locking chuck for drill or the like
US5195760A (en) * 1990-06-12 1993-03-23 Black & Decker Inc. Keyless chuck
US5158306A (en) * 1990-07-21 1992-10-27 Roehm Guenter H Drill chuck
WO2017051232A1 (en) * 2015-09-22 2017-03-30 Llambrich Precisón, S.L. Chuck with locking device
US10406606B2 (en) 2015-09-22 2019-09-10 Stryker Corporation Chuck with locking device
US10758987B2 (en) 2015-09-22 2020-09-01 Stryker Corporation Chuck with locking device

Also Published As

Publication number Publication date
FR2417363A1 (en) 1979-09-14
NL7900633A (en) 1979-08-21
DE2806797C2 (en) 1985-12-05
CH635767A5 (en) 1983-04-29
IT7967352D0 (en) 1979-02-16
NL185902B (en) 1990-03-16
JPS6219964B2 (en) 1987-05-01
NL185902C (en) 1990-08-16
JPS54117982A (en) 1979-09-13
FR2417363B1 (en) 1983-10-14
DE2806797A1 (en) 1979-08-23
IT1118374B (en) 1986-02-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950428