Handpiece for dental or surgical use
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United States of America Patent
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-
May 8, 2007
Grant Date -
Aug 18, 2005
app pub date -
Feb 1, 2005
filing date -
Feb 17, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
At the front, a handpiece (1) has a clamp (10) fitted to tightly grip the shank of a removable tool housed in guide holes (23, 25). The clamp has two or more levers (26) attached to an annular section (22) of the clamp by elastic joints (27), each of which has a gripping jaw (20) to grip the tool shank. On each lever, the gripping jaw (20) is located much closer to the joint (27) than to a supporting surface, on which a tightening mechanism (17) exerts a centripetal force so that the lever multiplies this force. The tightening mechanism preferably has a sliding sleeve (40) having a conical inside surface (44), which produces the force at the levers of the clamp by means of balls (45) housed in the holes of a hollow rotatable shaft (11).
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