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. 27, 1976
Filed:
Dec. 26, 1973
Applicant:
Inventor:
Francis H Tennis, Oconomowoc, WI (US);
Assignee:
Hydraulic Industries, Inc., Hartland, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F / ; F15B / ;
U.S. Cl.
CPC ...
214762 ; 91412 ; 91414 ; 137596 ; 13759612 ;
Abstract
A spool type control valve mechanism for use with backhoes, front end loaders, and other apparatus having a number of hydraulic cylinder driven work performing members whose motions must be coordinated in order to produce a prescribed work operation. Pressure compensating valve means which provides for regulation of the rate of flow to the cylinders of pressure fluid from a common supply passage also functions automatically to control connection of the cylinders with the supply passage in accordance with the work load on the cylinders, at times when the valve spools of all the control valves are in their working positions.