Dental handpiece with baffle for stabilizing rolling bearing cage
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United States of America Patent
Stats
-
Jun 15, 1999
Grant Date -
N/A
app pub date -
Jun 5, 1998
filing date -
Jun 9, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A dental handpiece is disclosed which includes: a head housing provided at a distal end of the dental handpiece, a burr sleeve for unrotatably holding a dental treatment tool, upper and lower ball bearings for rotatably supporting the burr sleeve, each of the upper and lower ball bearings having an inner ring, an outer ring, and a plurality of balls between the inner and outer rings, a rotor disposed between the upper and lower ball bearings and rotated by a compressed air for rotatively driving the burr sleeve, the rotor defining a rotation space within the head housing, a rolling bearing cage for supporting the plurality of balls at regular intervals in each of the upper and lower ball bearings, the cage having a side facing the rotor, and a baffle member disposed facing the side of the cage to define a first gap between the baffle member and the cage.
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