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Publication numberUS2010210 A
Publication typeGrant
Publication dateAug 6, 1935
Filing dateApr 20, 1934
Priority dateJun 1, 1933
Publication numberUS 2010210 A, US 2010210A, US-A-2010210, US2010210 A, US2010210A
InventorsPaul Witt
Original AssigneeDegussa
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Holder for dental instruments
US 2010210 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Aug. 6, 1935. w 2,010,210

HOLDER FOR DENTAL INSTRUMENTS Filed April 20. 1934 Jrwen for:

[5242 Win WWW Patented Aug. 6, 1935 PATENT OFFICE HOLDER FOR DENTAL ms'raomm'rs Paul Witt,

Deutsche Potsdam,

Gold-und Germany, assignor to Silberscheideanstalt,

Frankfort-on-the-Main, Germany ApplicationApril 20, 1934, Serial No. 721,622

In Germany June 1, 1933 2 Claims.

This invention relates to holders for dental instruments. The object of the invention is to facilitate the clamping of the drill or other instrument in the holder and its release there- 5 from, to give the exterior of the holder 9. better appearance and, by avoiding projecting parts which can only be cleansed with difliculty, to enable the holder to be thoroughly disinfected. The clamping device for the instrument, for example a drill, comprises, in accordance with the invention, a ring, which is axially displaceable in the head of the holder, by the displacement of which a locking member can be pressed into or released from an annular groove which .is provided in the drill or the like. This locking member preferably consists of a ball with which a conical surface provided on the displaceable ring coasts and thereby presses the ball into the annular groove in the drill or other instrument, the displaceable ring being held in the locked position by means of a spring which presses against it. The release of the drill or other instrumentis effected by compressing the spring which presses against the ring whereby the conical surface is moved away from the locking member and the latter falls into a recess in which it lies out of engagement with the drill or other instrument.

A constructional embodiment of the invention is illustrated by way of example in the accompanying drawing, in which:--

Figure 1 is a cross section through the head of the instrument holder with the locking member in the position in which it is out of engagement with the drill or'other instrument;

Figure 2 is a partial section similar to Figure 1, but with the locking member in engagement with the instrument; and

Figure 3 is a detail view.

Referring to the drawing, the numeral 2 represents the head of the holder in the neck of which the part 3 which carries the lower driving member 4 is mounted. "The lower driving member 4 engages an upper driving member 5 at right angles thereto which is provided on a sleeve 6 which is revoluble in the head 2. The drill 8 is inserted in the sleeve 6 and held therein as hereinafter described.

The rotary sleeve 6 has an annular shoulder 9 against which one end of a helical spring l abuts. The other end of the spring can be compressed by an end face of an axially displaceable ring-like member II. The sleeve 6 is provided at I! with a recess into which a ball l3 can partly enter. This happens if no pressure is exterted on the rear surface I of the annular member ll (see Figure 2). In this case the spring Ill presses the annular member II to the rear so that an inclined surface IS on the annular member coacts with the ball I! and presses it into the recess H in such a manner that a part of the ball projects into an annular groove I6 in the drill 8 and prevents the drill from being displaced in an axial direction (see Figures 2 and 3). The drill 8 is rotated by the sleeve in known manner by means of a flat l'I provided at the V rear end of the drill with which a corresponding flat I on the sleeve 5 engages. In order to release the drill (see Figure 1), pressure is exerted against the rear face it of the annular member ll so that the spring I0 is compressed and the conical surface I5 is removed from the ball I; which, therefore, falls into the recess I8 in the annular member II and into a position in which it is out of engagement with the annular groove Hi. The drill 8 can then fall out. The clamping of the drill in the sleeve can take place by simply pushing it into the sleeve when the ball I; first presses the conical surface I5 a short distance backwards against the action of the spring I0 and then automatically re-engages with the annular groove 16 as soon as this comes within range.

Several balls, for example three, may be employed instead of only one. When several balls are used the flats I1 and I for causing the drill to rotate with the sleeve can be omitted, since, if the implement be properly constructed, the clamping action of the balls is sufllcient to ensure that the drill is rotated without slip together with the sleeve. Also other rolling bodies, for example rollers, can be employed instead of balls. It is also possible to arrange a roller in such a way as to cause the drill to rotate with the sleeve, that is to say so as to replace the flat 1 on the sleeve 6.

Instead of the annular groove 16, the drill may be provided with a number of recesses corresponding in number to the number of balls employed into which the balls l3 enter. The described form of construction has the advantage that even after a long period of use there is no axial play and that small deviations in the width and depth of the annular groove l6 which is usually provided in the drills do not impair the tightness of the clamping, because inequalities of this kind are neutralized by the ball entering to a greater or less depth into the recess l2.

.A similar construction can also be employed for coupling the axle 3 with an elbow piece or double elbow piece situated beneath it.

I claim:-- v

1. A holder for dental instruments comprising a casing, a sleeve revolubly mounted in the 09.8- ing and adapted to receive the. shank 01' an instrument. an annular member fitted in the casing over one end of said sleeve so as to be axially displaceable thereon, an aperture in the sleeve surrounded by the annular member, a locking member located in said annular member in proximity to said aperture, means on said annular member whereby in one axial position said locking member is caused to project in part through said aperture and in another axial position to be released therefrom, and a spring whereby the said annular member is held in the position in which the locking member engages in the aperture.

a part of.-

2. A holder for dental instruments comprising a casing, a sleeve revolubly mounted in the easing and adapted to receive the shank of an instrument, an annular member fitted in the easing over one end of said sleeve so as to be axially displaceable thereon, an aperture in a part of the sleevesurrounded by the annular member, a recess in said annular member in proximity to said aperture, a ball located in said recess when the annular member is in one axial position, an inclined surface on said annular member whereby said ball is caused to project in part through said aperture when the annular member is displaced into another axial position, and a spring whereby the annular member is held in the position in which the locking member engages the aperture.

PAUL WI'I'I

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2457273 *Nov 17, 1947Dec 28, 1948Renfroe Joseph GSpindle adapter
US2494755 *Nov 1, 1946Jan 17, 1950Grover Lyndon VQuick disconnect socket
US2504233 *Nov 28, 1947Apr 18, 1950Martin StauntDental hand piece
US2536702 *Sep 23, 1947Jan 2, 1951Scheiwer Albert TCoupling
US2601389 *May 24, 1947Jun 24, 1952A R D CorpCentrifugal casting machine
US2792630 *Jun 23, 1953May 21, 1957Kurt KaltenbachAngle-piece head, more especially for grinding for dental and medical purposes
US2861462 *Oct 15, 1956Nov 25, 1958Leslie N BakerLimited torque drive for electrically operated rotary tooth brush
US3398965 *May 26, 1966Aug 27, 1968Balas Collet CompanyQuick change tool holder
US3428327 *Sep 19, 1966Feb 18, 1969Black & Decker Mfg CoQuick release rotary tool chuck
US4109735 *Aug 2, 1976Aug 29, 1978Minnesota Mining And Manufacturing CompanyRotary surgical driver
US4209182 *Oct 5, 1978Jun 24, 1980Cooper Industries, Inc.Bit retainer for screwdriver
US4493645 *Jun 30, 1983Jan 15, 1985Nakanishi Dental Mfg., Co., Ltd.Device for opening and closing a chuck for a dental handpiece
US4690641 *Feb 3, 1986Sep 1, 1987Micro-Mega S.A.Contra-angle or turbine head of a dental handpiece
US4763548 *Oct 15, 1986Aug 16, 1988Oswald Leibinger GmbhScrewdriver, particularly for surgical purposes
US4781588 *Dec 8, 1986Nov 1, 1988Daniel GranierCounter-angle head for endodontic instrument
US4858939 *Jul 26, 1988Aug 22, 1989The Aro CorporationBit retention and release mechanism
US4940410 *Aug 24, 1988Jul 10, 1990Dentalwerk Burmoos Gesellschaft M.B.H.Dental tool holder
US5584689 *Jul 29, 1994Dec 17, 1996Kaltenbach & Voigt Gmbh & Co.Angled or straight handpiece with a releasable mounting device for a tool, in particular for medical purposes
US6065966 *Nov 17, 1998May 23, 2000Kaltenbach & Voigt Gmbh & Co.Medical or dental treatment instrument for the treatment of body tissue or a substitute material, in particular by cutting, and tool for such a treatment instrument
USRE35147 *Jul 8, 1992Jan 23, 1996Dentalwerk Burmoos Gesellschaft M.B.H.Dental tool holder
CN101898901A *Jun 12, 2010Dec 1, 2010北京林业大学Carbonized wood curing technology
EP2123233A1 *May 23, 2008Nov 25, 2009W & H Dentlwerk Bürmoos GmbHFluid driven medical, in particular dental, handgrip element
Classifications
U.S. Classification279/82, 433/128, 279/30, 279/75
International ClassificationA61C1/14, A61C1/08
Cooperative ClassificationA61C1/141
European ClassificationA61C1/14A