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:
Jul. 31, 1984
Filed:
May. 18, 1981
Noboru Murakami, Nagoya, JP;
Hiromi Hasegawa, Nagoya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A transmission for a vehicle, including a torque converter, a planetary gear system capable of forming gear trains of forward low-speed range and high speed range by engagement and release of brakes and a clutch, a manual valve for gear shifting a shift valve, an electromagnetic valve, and a hydraulic control circuit for applying a line pressure to the clutch and brakes. The valves are mounted in a valve casing having a flat wall surface in face-to-face relation with a flat wall surface of a transmission casing. Clamped fluid-tight between the two flat wall surfaces is a partition plate which is provided with apertures for intercommunicating conduits of the hydraulic control circuit formed on the opposite flat wall surfaces of the casings. The present invention employs partition plates with different numbers of communicating holes in different positions. A first partition plate interposed between the valve and transmission casings, provides an automatic transmission in which the planetary gear system is automatically shifted to and from forward low-speed and high-speed range gear trains according to the vehicle speed, with the manual shift valve in forward 'D' position. A second partition plate interposed between the casings provides a manual transmission in which the planetary gear system is shifted into a gear train of the forward high-speed range when the manual valve is put in forward 'D' position and into a forward low-speed range when the manual valve is put in forward 'L' position.