Patent ID: 6848451

Claim:
A manicure tool for shaping and smoothing nails having a transmission for changing rotary motion into angularly reciprocating motion and adapted to be mounted on the output end of a power unit of the type having a rotary drive output and used to drive the manicure tool, said transmission comprising: (a) a support member ( 42 ); (b) a driving member ( 30 ) in a first plane oriented in a first direction supported by said support member ( 42 ) for rotary motion; (c) a driven member ( 40 ) made of a resinous material and supported by said support member ( 42 ) for reciprocating angular movement by said support member ( 42 ) in a second plane, said second plane being transverse to said first plane, said driving member ( 30 ), said driven resinous member ( 40 ) and said support member ( 42 ) forming a transmission subassembly adapted to be mounted on the output end of said power unit with said rotary drive output mechanically coupled to said driving member ( 30 ); (d) a driving cam surface ( 50 ) disposed on a portion of said driving member ( 30 ), said driving cam surface ( 50 ) having a first shape; (e) a driven cam surface ( 60 ) disposed on a portion of said driven resinous member ( 40 ), said driven cam surface ( 60 ) having a second shape, said driven resinous member ( 40 ) being supported with respect said driving member ( 30 ) in a position where said driving cam surface ( 50 ) is in contact with said driven cam surface ( 60 ) during at least a portion of the cycle of rotation of said driving cam surface ( 50 ), said second shape configured and dimensioned to be driven by said driving cam surface ( 50 ) in a positive angular direction during one part of said cycle and be driven by said driving cam surface ( 50 ) in a negative angular direction during another part of said cycle wherein said driven cam surface ( 60 ) comprises a shaft mounted onto a support, wherein the support is coupled to a coupling element having a pad attached to the surface of the coupling element.