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. 18, 1995
Filed:
Dec. 20, 1993
Applicant:
Inventor:
Dennis W Person, Canton, MI (US);
Assignee:
Ford Motor Company, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74335 ; 475132 ; 475133 ; 477126 ; 477131 ;
Abstract
A hydraulic latch for directing line pressure alternately to a forward drive circuit and a reverse drive circuit includes three solenoid-operated select valves that direct pressure from a line pressure source to a reverse drive select valve, a forward drive select valve, and two coaxial range control valves. The two drive select valves are interconnected to form a hydraulic latch whose outputs are connected to the range control valve such that either the forward drive friction elements are pressurized, the reverse drive friction elements are pressurized, or none of the friction elements are pressurized.