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:
Jan. 28, 1986
Filed:
Oct. 09, 1984
Charles A Barker, Indianapolis, IN (US);
Jim L Rau, Lafayette, IN (US);
TRW Inc., Cleveland, OH (US);
Abstract
An apparatus for controlling fluid flow to a steering motor and an auxiliary apparatus is capable of smoothly changing between conditions in which it directs relatively small and relatively large flows of fluid to the auxiliary apparatus. The apparatus includes a priority valve assembly having a valve member positioned in accordance with variations in the demand for steering fluid. A land on the valve member cooperates with a fixed valve surface to form a variable size orifice through which fluid flows to a steering controller. A second land on the valve member cooperates with a fixed valve surface to form a variable size main auxiliary flow control orifice through which all of the fluid flow to the auxiliary apparatus is directed during relatively low fluid flow rates to the auxiliary apparatus. A third land on the valve member cooperates with a fixed valve surface to form a second variable size flow control orifice through which additional fluid flow is directed to the auxiliary apparatus during relatively high fluid flow rates to the auxiliary apparatus.