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:
Sep. 05, 2000
Filed:
May. 18, 1998
Hiroki Maki, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A curvature of a locus of contact points at a higher torque value is increased such that the torque-dependent characteristic of the working transmission error assumes a minimum value in the vicinity of a working torque value T.sub.1 at the tooth surface position corresponding to the working torque value T.sub.1, in the vicinity of a working torque value T.sub.3 at the tooth surface position corresponding to the working torque value T.sub.3, and in the vicinity of a working torque value T.sub.5 at the tooth surface position corresponding to the working torque value T.sub.5. As a consequence, the change in the working transmission error at the working torque is minimized making it possible to reduce the working transmission error in a wide working torque range.