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. 01, 1977
Filed:
Feb. 13, 1975
Donnell L Dunn, Terre Haute, IN (US);
J. I. Case Company, Racine, WI (US);
Abstract
A hydraulic system for a working machine of the vehicle type having a power steering mechanism and a hydraulically powered working implement, such as a back-hoe implement. A hydraulic valve is inclined in the power steering mechanism, and another hydraulic valve operates the powered implement. A flow control valve divides flow between the aforementioned two valves, and a pump supplies the flow in the system. Pressure relief valves are included in the system, such that one relief valve senses pressure in the power steering branch of the system, and that relief valve responds to the lowest hydraulic pressure, and a relief valve for the powered implement responds to a higher hydraulic pressure. Only a single hydraulic pump is required for the power steering and the powered implement.