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:
Jun. 15, 1982
Filed:
Feb. 06, 1979
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A shift valve arrangement for incorporation into a hydraulic control system of an automatic power transmission, comprising a shift valve including separate switching and control valve elements arranged and movable in series with each other, the control valve element havind different pressure acting areas to be acted upon by a fluid pressure when the control valve element is in upshift and downshift positions, respectively, under kickdown condition and a pressure acting area to provide an upshift pattern of the transmission for part-throttle conditions of the engine, and a downshift valve having pressure acting areas to provide a downshift pattern for the part-throttle conditions of the engine.