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:
May. 08, 2012
Filed:
Jan. 07, 2008
Tomoshige Kobayashi, Iwata, JP;
Teruaki Fujio, Iwata, JP;
Hisaaki Kura, Iwata, JP;
Shin Tomogami, Iwata, JP;
Takeshi Kohara, Iwata, JP;
Tomoshige Kobayashi, Iwata, JP;
Teruaki Fujio, Iwata, JP;
Hisaaki Kura, Iwata, JP;
Shin Tomogami, Iwata, JP;
Takeshi Kohara, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
A fixed-type constant velocity universal joint can sufficiently interpose a lubricant between a torque transmitting ball and a guide groove, and reduce frictional force. The fixed-type constant velocity universal joint of the present invention includes an outer joint memberthat is filled with a lubricant and on which a guide groovethat extends in an axial direction is formed on a spherical inner circumferential surface, an inner joint memberprovided on an inner diameter side of the outer joint memberand on which a guide groovethat extends in the axial direction is formed on a spherical outer circumferential surface, a torque transmitting ballinterposed between opposing guide groovesandof the outer joint memberand the inner joint membersuch as to roll freely, and a cagethat holds each ball. Numerous miniscule recesses are randomly formed on a surface of the ball