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. 16, 2014
Filed:
Apr. 18, 2011
Applicants:
Patrick Opdenbosch, Peoria, IL (US);
Joshua Dierking, Peoria, IL (US);
Inventors:
Patrick Opdenbosch, Peoria, IL (US);
Joshua Dierking, Peoria, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01); F15B 11/00 (2006.01); F15B 7/00 (2006.01);
U.S. Cl.
CPC ...
F15B 7/006 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/761 (2013.01); F15B 2211/27 (2013.01); F15B 2211/20553 (2013.01); F15B 11/003 (2013.01); F15B 2211/613 (2013.01); F15B 2211/50527 (2013.01); F15B 2211/3058 (2013.01);
Abstract
First and second mechanical hydraulic valves are disposed between a pump and the cap side chamber of an actuator and the pump and the rod chamber of the pump. The first and second valves are actuated as a result of respective pressure differentials applied across the valves. A controller controls flow from a pump in response to a commanded motion to control movement of the actuator, and cause the valves to open. The valves are disposed in their no-flow positions when the pump is not operative, and when the hydraulic system of off or locked out to hold a load.