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. 08, 1977
Filed:
Apr. 09, 1976
Applicant:
Inventor:
Donnell Lynn Dunn, Terre Haute, IN (US);
Assignee:
J. I. Case Company, Racine, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ; F15B / ;
U.S. Cl.
CPC ...
60459 ; 60468 ;
Abstract
A hydraulic load-sensing system including a pump, a valve, a load-responsive actuator, and a hydraulic pressure unloading valve, all hydraulically connected together. The outlet of the pump is directed to both valves, and a sensing port and hydraulic line exist between the two valves for communicating the hydraulic load pressure to the unloading valve and thereby establishing the pump outlet pressure. A biasing member is included in the unloading valve, and therefore a constant hydraulic pressure drop is established across the valve supplying fluid to the load-responsive actuator, and a pressure relief valve limits the outlet pressure of the pump.