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. 01, 2009
Filed:
Nov. 01, 2006
Tatsuhiko Iwasaki, Hiroshima, JP;
Takamichi Teraoka, Hiroshima, JP;
Tokimori Saka, Hiroshima, JP;
Naohiro Sakaue, Hiroshima, JP;
Yoshihiko Fujita, Aki-gun, JP;
Tatsuhiko Iwasaki, Hiroshima, JP;
Takamichi Teraoka, Hiroshima, JP;
Tokimori Saka, Hiroshima, JP;
Naohiro Sakaue, Hiroshima, JP;
Yoshihiko Fujita, Aki-gun, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An automatic transmission is provided comprising a transmission case, a first shaft housed in and rotationally supported by said transmission case, and capable of receiving torque from an engine, a first shifting gear mechanism arranged coaxially with the first shaft, and a second shifting gear mechanism including a second planetary gear set. The second planetary gear set is housed within the transmission case and arranged coaxially with the first shaft, one of its sun and ring gears is capable of rotating together with the input shaft, and the other of the sun and ring gears is fixed to the transmission case. The automatic transmission further comprises first and second frictional elements arranged at least partly overlapped with the second planetary gear set in the axial direction between the planetary gear set and the transmission case in the radial direction. Accordingly, the plurality of frictional elements may be arranged on a shorter shaft without excessively increasing the radial size of the automatic transmission.