Air turbine handpiece
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United States of America Patent
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-
May 11, 1999
Grant Date -
N/A
app pub date -
Feb 24, 1998
filing date -
Feb 25, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An air turbine handpiece comprises a grip portion and a head portion disposed at a tip of the grip portion. In the handpiece, a rotor is disposed in a chamber in the head portion, and a cutting tool is detachably attached to a rotation shaft which is rotated integrally with the rotor. A nozzle opening for injecting air toward a turbine blade portion and an exhaust opening for exhausting the injected air to the outside are opened to the chamber of the head portion. An arc width of the nozzle opening in a circumferential direction is two or more times a height in a direction of a rotation axis of the rotor. The nozzle opening is formed so as to extend in a width direction.
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