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Class Information
Number: 433/129
Name: Dentistry > Apparatus > Having motor or means to transmit motion from motor to tool (e.g., "engine") > Hand-held tool or handpiece > Having means facilitating assembly or disassembly of tool or handpiece > Means to releaseably grip tool > Including axially movable collect to cam fingers
Description: Apparatus wherein the means for releasably holding a working contacting or modifying means comprises a plurality of gripping elements adapted to grip the periphery of the work contacting and modifying means by moving a member which surrounds said gripping elements to urge them inwardly to grip the work contacting and modifying means.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8104774 Hand-held instrument for dental or surgical use Jan. 31, 2012
7815433 Adjustable tool drive arrangement Oct. 19, 2010
7789602 Motor element, in particular dental medical handpiece having a disconnectable coupling for a tool-holder Sep. 7, 2010
7611315 Motor element, in particular medical handpiece with a collet chuck Nov. 3, 2009
7303394 Hand-held piece for dental or surgical use including a resilient clamp Dec. 4, 2007
7258547 Press-type bit-holding mechanism of a dental high-speed handset Aug. 21, 2007
7214060 Handpiece for dental or surgical use May. 8, 2007
7137633 Wrench-free manual chuck turbine Nov. 21, 2006
6821120 Dental handpiece with tool holder Nov. 23, 2004
6209886 Resecting tool with independent variable axial extension for tool implements and guide sleeves Apr. 3, 2001
6155826 Grip chuck spindle assembly for a dental handpiece Dec. 5, 2000
5911578 Head assembly for a medical handpiece Jun. 15, 1999
5810588 Clamping device particularly useful for dental handpieces Sep. 22, 1998
5779474 Sudden stop mechanism and air-gap seal for dental handpiece Jul. 14, 1998
5730596 Dental instrument holder Mar. 24, 1998
5688122 Chucking device for a dental tool Nov. 18, 1997
5653453 Collet chuck Aug. 5, 1997
5591028 Dental cutting tool holder Jan. 7, 1997
5549474 Clamping device particularly useful for dental handpieces Aug. 27, 1996
5518398 Dental handpiece having rotatable contact member May. 21, 1996
5478093 Surgical handpiece Dec. 26, 1995
5383785 Push-button operated chucking device for a dental angle piece Jan. 24, 1995
5254004 Self-tightening chuck for dental tools Oct. 19, 1993
5252067 Handpiece for dental medical treatment Oct. 12, 1993
5165896 Clamping mechanism for a dental tool Nov. 24, 1992
5074789 Chucking device for dental handpiece Dec. 24, 1991
5074788 Device for preventing intrusion of foreign matter into dental handpiece Dec. 24, 1991
4874314 Socket to clampingly hold dental tools Oct. 17, 1989
4863381 Dental handpiece Sep. 5, 1989
4844070 Changeable scalpel blade and chuck assembly Jul. 4, 1989
4781589 Clamping arrangement, especially for dental instruments Nov. 1, 1988
4773856 Device for actuating a tool fastening and releasing mechanism Sep. 27, 1988
4690641 Contra-angle or turbine head of a dental handpiece Sep. 1, 1987
4611990 Dental handpiece construction Sep. 16, 1986
4595362 Handle Jun. 17, 1986
4595363 Dental handpiece having means for opening and closing a chuck Jun. 17, 1986
4536157 Lever actuated chuck mechanism for dental handpiece Aug. 20, 1985
4525144 Dental attachment Jun. 25, 1985
4493645 Device for opening and closing a chuck for a dental handpiece Jan. 15, 1985
4436512 Device for fixing drill bits into the head of air motors for hand-held dentists' tools Mar. 13, 1984
4400158 Control release for a tool grip for a dental handpiece Aug. 23, 1983
4330278 Endodontic flow-through ultrasonic instrument holder device May. 18, 1982
4281988 Dental handpiece Aug. 4, 1981
4279597 Chuck assembly for dental handpieces Jul. 21, 1981
4203222 Automatic chuck for drill May. 20, 1980
4198754 Dental turbine spindle assembly Apr. 22, 1980
4188725 Dental hand-piece with an air turbine Feb. 19, 1980
4167062 Dental handpiece Sep. 11, 1979
4114276 Dental tool handpiece assembly with removable spacer member Sep. 19, 1978
4104799 Dental handpiece Aug. 8, 1978

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