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. 19, 1984
Filed:
Feb. 03, 1982
Jim L Rau, Lafayette, IN (US);
TRW Inc., Cleveland, OH (US);
Abstract
A hdydrostatic load sense vehicle steering system which directs fluid from a source to a hydrostatic steering circuit that includes a steering controller, and to an auxiliary circuit. Fluid control means responds to fluid pressures in a pilot circuit to direct priority flow to the steering circuit and excess flow to the auxiliary circuit. The pilot circuit includes a first pilot conduit that communicates with a load sense port of the steering controller. The steering controller controls fluid pressures in the pilot circuit in accordance with the condition of the steering circuit. A second pilot conduit communicates a pressure signal in accordance with the condition of the auxiliary circuit to the fluid control means. The second pilot conduit also communicates through a bleed orifice with the load sense port of the steering controller. When the controller is in neutral, it directs the pilot fluid from its load sense port to a reservoir. When the controller moves away from neutral, it restricts pilot flow to the reservoir to provide a pressure signal in the pilot circuit that indicates a need for flow and pressure in the steering circuit.