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:
Jun. 25, 2002
Filed:
Mar. 31, 1999
Kenneth L. Stratton, Dunlap, IL (US);
Steven R. Genseal, Chillicothe, IL (US);
Steven R. Krause, Chillicothe, IL (US);
Patrick M. Pecchio, Peoria, IL (US);
Richard J. Skiba, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
The present invention provides an apparatus and method for determining a status of a relief valve located within a fluid system having a pump and an actuator valve. The fluid system is located on an earth moving machine, and the pump delivers fluid to the actuator through the actuator valve . The system includes a pressure compensation assembly adapted to control the fluid pressure of the system by bypassing fluid flow. The system also includes a relief valve, and a pressure sensor. The method includes the steps of positioning the actuator valve in a closed position, deactivating the pressure compensation assembly, and sensing a relief pressure of the system.