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:
Dec. 02, 1986
Filed:
Apr. 23, 1984
Desmond H Reynolds, West Midlands, GB;
Abstract
In a vehicle hydraulic system of the open center kind, hydraulic fluid for operating vehicle services is circulated continuously, normally by an engine-driven pump. A closed center booster which requires a substantially constant pressure differential to operate it, is included in the open center system, the pressure differential being provided by a fixed restriction. The fixed restriction may be operative when the pump is operative, or only when the booster is operative. The booster is arranged so that in operation, high pressure fluid entering a boost chamber displaces an equal volume of fluid from a forward chamber into the system. The booster may also include a one-way valve allowing flow of fluid from the forward chamber to the boost chamber.