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US 2003/0170589 A1Published application
Dental handpiece with improved grease retention
OwnerEugene J. Novak, Mikhail Ayzenshetyninventors
Life of this patent
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Abstract
A dental handpiece (10) has a rotor (15) and a ball bearing assembly (13, 14) supporting the rotor (15). At least one of the ball bearing assemblies (13, 14) has a ball (20) and a retainer (21). The retainer (21) has at least one grease retaining groove (30, 50) or void (51) therein.
Claims1
A dental handpiece of the type having a rotary member supported by at least one bearing assembly, wherein said at least one bearing assembly has an annular retainer and a plurality of balls at least partially supported by said annular retainer, the improvement comprising a grease retention groove in a surface of said annular retainer.
Dependencies are inferred from the claim text.