Patent ID: 6820590
Filing Date: 2004-11-23
Classification: F16H,H02K

Abstract:
A driving apparatus comprising:a driving source comprising a torque motor with a motor shaft having a motor shaft rotational axis; a driven shaft having a driven shaft rotational axis; and a gear train operably coupling said motor shaft to said driven shaft so as to transfer rotation of said motor shaft to said driven shaft; wherein said gear train comprises a non-circular driving gear attached to said motor shaft, and a non-circular driven gear attached to said driven shaft and engaged with said non-circular driving gear; wherein said non-circular driving gear has a rotating range through which said non-circular driving gear engages with said non-circular driven gear; wherein said non-circular driven gear has a rotating range through which said non-circular driven gear engages with said non-circular driving gear; and wherein said non-circular driving gear and said non-circular driven gear are shaped and arranged such that, with said non-circular driving gear and said non-circular driven gear both positioned at centers of their respective rotating ranges so as to define a driving gear periphery center and a driven gear periphery center at their respective engaged peripheral centers, a distance from said motor shaft rotational axis to said driving gear periphery center is greater than a distance from said driven shaft rotational axis to said driven gear periphery center.