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. 04, 1984
Filed:
Nov. 09, 1981
Stanley D Rosen, Southfield, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A control valve system for an automatic power transmission mechanism having planetary gearing defining plural torque delivery paths comprising fluid pressure servo operated brakes and clutches and a vehicle speed sensitive servo release shuttle valve which cooperates with the timing valve circuit to establish a first timed relationship between the application and release of the servos during a ratio change from the high ratio to an intermediate underdrive ratio at a relatively high speed and for establishing a different timing relationship between those circuit elements during a corresponding ratio change at a lower vehicle speed, the rate of application of the underdrive ratio servo during a ratio change from the lowest ratio to an intermediate underdrive ratio being calibrated independently of the calibration required for a ratio change from the high speed ratio to the same intermediate underdrive ratio.