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:
Aug. 08, 2000
Filed:
Mar. 17, 1999
Applicant:
Inventor:
Raud A Wilke, Dousman, WI (US);
Assignee:
Husco International, Inc., Waukesha, WI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
60427 ; 60452 ; 13759613 ; 13762568 ;
Abstract
An improved pressure-compensated hydraulic system includes a separate valve section which feeds hydraulic fluid from a variable displacement pump to one of several hydraulic actuators. Each valve section has a main valve spool and a pressure compensating poppet. The main valve spool has a metering orifice that controls the flow of fluid to the actuator. The poppets in the valve sections collectively apply a pressure to the pump pressure control input which is a function of the greatest to a load pressure among the hydraulic actuators.