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. 15, 2007
Filed:
Jul. 30, 2004
Tatsuhiro Goto, Shizuoka-ken, JP;
Hiroshi Murakami, Shizuoka-ken, JP;
Masahide Miyata, Shizuoka-ken, JP;
Mikio Tomiyama, Shizuoka-ken, JP;
Tatsuhiro Goto, Shizuoka-ken, JP;
Hiroshi Murakami, Shizuoka-ken, JP;
Masahide Miyata, Shizuoka-ken, JP;
Mikio Tomiyama, Shizuoka-ken, JP;
NTN Corporation, Osaka, JP;
Abstract
A constant velocity universal joint includes an outer joint member has three track grooves extending axially in an inner circumference portion thereof with a roller guide surface extending axially on each side of the respective track grooves; a tripod member has three trunnions protruding in the radial direction; and a roller mechanism is mounted in each of the trunnions of the tripod member. The roller mechanism is capable of swinging and oscillating freely with respect to the trunnions, and has a roller guided along the roller guide surface in the direction parallel to the axis line of the outer joint member. An outer peripheral surface of the roller, which is made by ground-finishing, is in contact with the roller guide surface, and has a surface roughness of 0.35 Ra or less.