Medical or dental handpiece
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 6, 2016
Issued Date -
N/A
app pub date -
Apr 8, 2011
filing date -
Apr 9, 2010
priority date (Note) -
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Abstract
A medical or dental handpiece has a grip 3. The grip 3 includes first to third rotation shafts 101, 201, and 301. The first and second shafts are connected through a first gear mechanism 1000 and the second and third shafts are connected through a second gear mechanism 2000 so that a rotation is transmitted from the first shaft through the first gear mechanism to the second shaft and then from the second shaft through the second gear mechanism to the third shaft. The first or second gear mechanism has an internal gear secured on shaft and an external gear secured on the other shaft, the internal and the external gears being engaged with each other. The external gear is substantially enclosed within a cylindrical plane 1001, 2001 extending along a peripheral edge of the internal gear.
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