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:
Nov. 11, 2025
Filed:
Mar. 07, 2025
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Takeshi Matsumoto, Toyota, JP;
Masanori Sakai, Nagoya, JP;
Yoshito Sekiguchi, Kariya, JP;
Jun Kamitake, Toyota, JP;
Takeyoshi Horibe, Hekinan, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A planetary gear mechanism including a plurality of pinion gears held rotatably and revolvably, and a ring gear meshing with the plurality of pinion gears, wherein the ring gear includes a plurality of low rigidity portions (through holes) having a small section modulus in a radial direction of the ring gear at predetermined intervals in a circumferential direction of the ring gear, and the plurality of teeth of the ring gear include a thermally-treated distortion portion (gear portion) in which an accumulated pitch error based on thermal treatment fluctuates.