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:
Mar. 10, 1987
Filed:
Oct. 10, 1985
William T Rabe, Lafayette, IN (US);
TRW, Inc., Lyndhurst, OH (US);
Abstract
A power assist steering gear for use in vehicles having a housing that defines a chamber. A piston dividing the chamber into first and second chamber portions. The piston is movable through a work stroke in opposite directions in the chamber. A steering valve directs fluid pressure into the first chamber portion and vents the second chamber portion to effect piston movement in a first direction and directs fluid pressure into the second chamber portion and vents the first chamber portion to effect piston movement in a second direction. An input shaft moves to effect actuation of the steering valve. A relief valve for communicates the first and second chamber portions when the piston is near the end of its work stroke. The relief valve has a valve member and valve seat which are movable between a closed position blocking communication between the first and second chambers and a fully open position establishing communication between the first and second chambers when the piston reaches the end of its work stroke. A press-fit connection effects adjustment of, in response to movement of the input shaft, the position in the piston path at which the valve member and valve seat move relatively to an open position.