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. 26, 1994
Filed:
Sep. 02, 1992
Kunihiko Sano, Shizuoka, JP;
Mitsugi Tazawa, Shizuoka, JP;
Jatco Corporation, Fuji, JP;
Abstract
A speed change control device for an automatic transmission is shown which comprises first, second and third shift valves, each having two switching positions for selectively carrying out application and releasing of hydraulic pressure to and from an oil chamber of a hydraulically operated friction element. First and second solenoid valves are employed each controlling an output of hydraulic pressure in accordance with an electric signal applied thereto. The first solenoid valve outputs a hydraulic pressure for controlling the switching operation of the second shift valve, and the second solenoid valve outputs a hydraulic pressure for controlling the switching operation of the first shift valve. A passage structure is further employed which applies the hydraulic pressure from the second solenoid valve to the third shift valve to control the switching operation of the same only when the second shift valve assumes one given position.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile