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:
Jan. 13, 1981
Filed:
Jan. 15, 1979
Applicant:
Inventor:
Robert Smilges, Paris, FR;
Assignee:
Abex Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ;
U.S. Cl.
CPC ...
91420 ; 91445 ; 91447 ; 137106 ; 137501 ;
Abstract
A hydraulic system for raising and lowering a load by means of a fluid motor includes a counterbalance valve which controls the flow of fluid to and from the motor. The counterbalance valve has a pilot operated metering orifice which passes fluid from the motor when the load is lowered and a compensator valve which maintains a fixed pressure differential across the metering orifice. This results in a fixed flow of fluid through the metering orifice when the load is lowered.