Dental handpiece and collet wrench therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 2, 1982
Grant Date -
N/A
app pub date -
May 7, 1980
filing date -
May 7, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An air driven dental handpiece having an air turbine at one end thereof. Collet means for securing a dental bur therein are positioned within the air turbine. The collet means includes a plurality of collapsible jaws at the bottom thereof. Threads are provided on the exterior surface of the collet means in the area of the jaws. The bottom of the collet means is tapered, and a collet nut is threadedly secured on the collet means. The collet nut has an internal taper which is complementary to the taper of the collet means. The threaded advancement of the collet nut on the collet means causes the collapsing of the jaws of the collet means, through the mating tapers, and accordingly a dental bur can be secured in the collet means.
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