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:
Sep. 02, 2003
Filed:
Dec. 20, 2001
Applicant:
Inventor:
Roger D. Mickelson, West Burlington, IA (US);
Assignee:
Case Corporation, Racine, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 3/102 ;
U.S. Cl.
CPC ...
F16D 3/102 ;
Abstract
A backhoe hydraulic system includes a first source of hydraulic fluid, a tank or reservoir, a boom lift cylinder, and a directional control valve that controls fluid flow between the boom swing cylinder and the tank and reservoir. The system also includes a second source of hydraulic fluid (at a higher pressure than the first source) that is connected to one port of the boom lift cylinder via a separate boost valve.