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:
Apr. 12, 2022
Filed:
Oct. 11, 2019
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Takashi Okubo, Ashigarakami-gun, JP;
Kozo Yamamoto, Nagoya, JP;
Keisuke Ninomiya, Susono, JP;
Hironori Asaoka, Numazu, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
An automatic transmission includes: a multi-disc brake including first and second friction engagement elements which are alternately arranged in an axial direction, and a tube that supplies lubricating oil to the first friction engagement element and the second friction engagement element in a transmission case. Further, the tube has injection holes that inject the lubricating oil toward a spline groove, which is fitted with spline teeth of the first friction engagement element on an inner peripheral surface of the transmission case, and the injection holes open toward a gap, which is formed between the spline groove and the spline teeth, and inject the lubricating oil to cause the lubricating oil to contact a surface of the spline groove located above the spline teeth.