Handpiece for dental or surgical use with locking mechanism
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United States of America Patent
Stats
-
Nov 11, 2008
Grant Date -
Mar 8, 2007
app pub date -
Feb 17, 2005
filing date -
Feb 17, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The handpiece includes at the front a collet arranged for strongly gripping the shank of a removable tool housed in guide bores. The collet includes two or several arms attached to an annular part of the collet to grip the tool shank. Preferably, the collet arms are levers each having a support surface which is far from the jaw and on which a gripping mechanism exerts a force which is multiplied by the lever. The gripping mechanism includes a sliding sleeve having an inner conical surface which produces the force on the collet levers via balls. This arrangement enables a smaller gripping spring to be used, or such spring to be omitted. The balls of the releasing mechanism are guided in helical slots having a flexible lateral strip which holds the gripping mechanism in position via a snap fit.
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