Machine element or mechanism – Gearing – Follow-up mechanism
Reexamination Certificate
2005-03-29
2010-10-05
Ridley, Richard W (Department: 3656)
Machine element or mechanism
Gearing
Follow-up mechanism
C074S425000, C074S409000, C074S089140, C074S458000
Reexamination Certificate
active
07806016
ABSTRACT:
A worm gear mechanism includes a worm, a torque-transmitting worm wheel meshing with the worm, and an auxiliary worm wheel disposed concentrically with the torque-transmitting worm wheel. The auxiliary worm wheel has a pitch circle diameter set to be greater than a pitch circle diameter of the torque-transmitting worm wheel and hence meshes with the worm in a meshing phase different from that of the torque-transmitting worm wheel. A screw thread provided on the worm actually meshes with teeth of the torque-transmitting worm wheel along a length defined as an actual meshing length. The screw thread has an effective length reduced to be approximately equal to the actual meshing length.
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Shimizu Yasuo
Watanabe Katsuji
Hamre Schumann Mueller & Larson P.C.
Honda Motor Co. Ltd.
Ridley Richard W
Waits Alan B
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