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:
May. 31, 2011
Filed:
Aug. 14, 2008
Gregory W. Hefler, Chillicothe, IL (US);
Michael C. Long, Metamora, IL (US);
Senthilkumar Rajagopalan, Edwards, IL (US);
Donald A. Fuller, Peoria, IL (US);
Gregory W. Hefler, Chillicothe, IL (US);
Michael C. Long, Metamora, IL (US);
Senthilkumar Rajagopalan, Edwards, IL (US);
Donald A. Fuller, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A check valve for use with a pump is disclosed. The check valve may have a body at least partially defining a central bore with an open end and a closed end, and a spring guide separate from the body and disposed within the closed end of the central bore. The check valve may also have a spring located within the central bore and having a first end operatively engaged with the spring guide, and a valve element operatively engaged with a second end of the spring and being movable by a pressure differential to compress the spring. The spring guide may be moveable relative to the body.