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:
Aug. 07, 2007
Filed:
Mar. 27, 2004
Applicants:
Richard J. Lech, Burlington, IA (US);
Matthew J. Hennemann, Burlington, IA (US);
Inventors:
Richard J. Lech, Burlington, IA (US);
Matthew J. Hennemann, Burlington, IA (US);
Assignee:
CNH America LLC, New Holland, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hybrid hydraulic system for a work vehicle is provided that includes a first fixed displacement hydraulic pump whose outlet is connected to a priority valve. The priority valve, in turn, directs the pump's flow to a first group of closed center backhoe valves on a primary circuit and a second group of open center loader valves on a secondary circuit. A second hydraulic pump is provided with independent load sensing capability to supplement fluid flow provided by the first pump.