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:
Oct. 31, 2006
Filed:
Jun. 05, 2003
Tomonori Ohwaki, Kariya, JP;
Tomoo Suzuki, Chita-gun, JP;
Kazuyuki Ichikawa, Okazaki, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Abstract
The contact angle of the ballwith each first guide trackof an inner joint memberis made to become smaller gradually from an opening portion side toward a bottom portion side, and the curvature radius for the first guide trackis made to become larger gradually from the opening portion side toward the bottom portion side. If the contact angle only were made to become smaller gradually from the opening portion side toward the bottom portion side, the contact angle would become too small thereby to cause chattering in rotation to be generated. If the curvature radius only were made to become larger gradually from the opening portion side toward the bottom portion side, a contact ellipse Mdefined by the balland the first guide trackwould become tool small, which would cause the ballto make dents on the surface of the first guide track. However, the aforementioned drawbacks can be obviated by gradually diminishing the contact angle and gradually enlarging the curvature radius from the opening portion side toward the bottom portion side.