Machine element or mechanism – Gearing
Reexamination Certificate
2006-11-24
2010-10-26
Le, David D (Department: 3655)
Machine element or mechanism
Gearing
C475S150000
Reexamination Certificate
active
07819041
ABSTRACT:
A variable transmission ratio apparatus for effectively preventing ratcheting between a flexible spline and a circular spline caused by a steering operation performing in a locked state. A variable transmission ratio apparatus includes a strain wave gear mechanism for adding rotation resulting from motor drive to rotation from an input shaft resulting from a steering operation and transmitting the added rotation to an output shaft, a housing accommodating the strain wave gear mechanism and the motor and fixed to a non-rotating portion, and a lock device for locking the housing and a motor shaft in a manner prohibiting relative rotation therebetween. Among the circular splines forming the strain wave gear mechanism, the number of teeth of the circular spline connected to the output shaft is greater than the number of teeth of the circular spline connected to the input shaft.
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Fujiwara Hidetoshi
Suzuki Hirotsune
Suzuki Yoshinori
Watanabe Osamu
Yamamori Motoyasu
JTEKT Corporation
Le David D
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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