Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroshi Bunko0
Tetsuya Yamamoto0
Takahide Saito0
Koichi Okada0
Date of Patent
February 2, 2010
0Patent Application Number
105911600
Date Filed
March 2, 2005
0Patent Primary Examiner
Patent abstract
A rotation transmission device includes a roller clutch unit for selectively engaging an inner member mounted on a rotary shaft with an outer ring through rollers, and an electromagnetic clutch unit for electromagnetically controlling the selective engagement by the rollers. The current until the clutch engages is set so as to correspond to a state in which a maximum current according to the revolving speed is required and is varied according to the revolving speed of the rotary shaft to reduce power consumption and the size of the electromagnetic coil.
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