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. 15, 2003
Filed:
Oct. 25, 2001
Kiyoharu Takagi, Okazaki, JP;
Yoshiyuki Onimaru, Nagoya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A vehicle automatic transmission includes an input shaft connected to an output shaft of an engine, an output shaft, and a torque converter for transmitting driving torque from the engine to the automatic transmission. A planetary gear system of the automatic transmission is provided with first, second, third and fourth planetary gear sets. The first gear set has a first sun gear, a first ring gear, a pair of first pinion gears, and a first planetary carrier. The second, third and fourth gear sets respectively have second, third and fourth sun gears, second, third and fourth ring gears, second, third and fourth single pinion gears, and second, third and fourth planetary carriers. The planetary gear system is further provided with four rotational elements, two clutches, and three brakes.