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:
Aug. 08, 2006
Filed:
Sep. 30, 2004
Hiroshi Bunko, Shizuoka, JP;
Hiroshi Bunko, Shizuoka, JP;
NTN Corporation, Osaka, JP;
Abstract
A rotation transmission device includes an input member, an outer ring mounted around the input member, a two-way clutch and an electromagnetic clutch for selectively engaging and disengaging the two-way clutch, both clutches being mounted between the input member and the outer ring. The electromagnetic clutch includes an armature coupled to a retainer of the two-way clutch so as to be non-rotatable and axially movable relative to the retainer. By energizing its electromagnet, the armature is pulled toward the electromagnet until it is pressed against a rotor fixed to the outer ring. The input member is formed with an oil supply passage. Oil is supplied through the oil supply passage and an oil passage defined between the outer periphery of the input member and the inner periphery of the rotor into a space between the two clutches. The oil passage has a restricted, narrow portion to limit the amount of oil supplied into the above space. This prevents a rise in oil pressure in this space and thus prevents the armature from being pressed against the rotor and the two-clutch from engaging in an untimely manner.