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:
Feb. 21, 1978
Filed:
Aug. 02, 1976
Patrick M Lourigan, Kenosha, WI (US);
Ramkishan Khatti, Racine, WI (US);
J. I. Case Company, Racine, WI (US);
Abstract
A hydraulic control system for controlling the flow between a reservoir, a pump having pressure flow compensating means associated therewith and first and second flow control means for controlling flow to first and second fluid operated devices is disclosed herein. The hydraulic control system includes a priority flow control valve which maintains a priority of flow from the pump to the first flow control means based upon the amount of flow required as well as the pressure requirements. The priority flow control valve has a valve spool which is positioned as a function of a biasing spring, as well as the pressure of the fluid from the pump to the first flow control means and the pressure of the fluid in the first fluid operated device. The system is particularly adapted for functions requiring higher pressure than low stand-by system pressure and where one of those functions require priority over the other.