The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 02, 2010
Filed:
Mar. 02, 2005
Koichi Okada, Iwata, JP;
Takahide Saito, Iwata, JP;
Hiroshi Bunko, Iwata, JP;
Tetsuya Yamamoto, Iwata, JP;
Koichi Okada, Iwata, JP;
Takahide Saito, Iwata, JP;
Hiroshi Bunko, Iwata, JP;
Tetsuya Yamamoto, Iwata, JP;
NTN Corporation, Osaka, JP;
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.