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:
Dec. 30, 2014
Filed:
Jun. 01, 2009
Carl D. Gilmore, South Milwaukee, WI (US);
Robert Weber, Wadsworth, IL (US);
Perry Decuir, Rochester Hills, MI (US);
Carl D. Gilmore, South Milwaukee, WI (US);
Robert Weber, Wadsworth, IL (US);
Perry DeCuir, Rochester Hills, MI (US);
Caterpillar Global Mining LLC, South Milwaukee, WI (US);
Abstract
A mining shovel () includes a hydraulic system comprising a plurality of fixed displacement pumps () driven by a variable speed motor (), and a tank () system comprising an upper return tank and a lower supply tank (). A cylinder manifold () is connected to the pump control manifold (), and includes a directional control valve for directing the extend and retract functions of the cylinder (), while accepting fluid flow in a single direction from the pump control manifold. The single direction flow allows for the use of smaller fluid conduits (), such that the hose providing a high pressure supply can be comparatively smaller than the return hose ().