Rolling bearing for a dental instrument hand-piece

Details Rolling bearing for a dental instrument hand-piece Rolling bearing for a dental instrument hand-piece

1995-12-13

2000-09-05

Bucci, David A.

Bearings

Rotary bearing

Antifriction bearing

384576, 384902, F16C 3344, F16C 3356

Patent

active

061132780

ABSTRACT:
A rolling bearing for use in a dental hand-piece which can withstand sterilizing temperatures ranging from 135-200 .degree. C., and which can be rotated at a speed of 300000 rpm or higher with a minimum amount of lubricant used. This rolling bearing is used in a hand-piece having a shaft to which a dental rotary cutting tool is detachably mounted, a turbine fixed to the shaft, and a passage for introducing compressed air for driving the turbine. The rolling bearing has a retainer formed by sintering a polyimide resin powder so that it has 5-20% by volume of mutually communicating pores and impregnating the sintered member thus formed with a fluorinated oil.

REFERENCES:
patent: 4238538 (1980-12-01), Manwiller

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