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:
Jan. 06, 2015
Filed:
Jul. 13, 2012
Deepak Sahini, Columbus, IN (US);
W. Joseph Satterfield, Perth, AU;
Robert P. Erickson, Columbus, IN (US);
Jeffrey J. Sullivan, Columbus, IN (US);
Donald J. Benson, Columbus, IN (US);
Deepak Sahini, Columbus, IN (US);
W. Joseph Satterfield, Perth, AU;
Robert P. Erickson, Columbus, IN (US);
Jeffrey J. Sullivan, Columbus, IN (US);
Donald J. Benson, Columbus, IN (US);
Cummins Intellectual Property, Inc., Minneapolis, MN (US);
Abstract
A fuel pressure relief valve is positioned along a fuel circuit of an internal combustion engine. The pressure relief valve includes a valve body, a first plunger positioned within the valve body, a second plunger positioned within the first plunger, and a valve plug securing the first and second plungers in the valve body. A spring is positioned between the valve plug and the second plunger. Fuel leakage into the pressure relief valve causes the pressure relief valve to lift undesirably in the absence of excessive fuel pressure. The undesirable lifting undesirably affects the operation of the fuel rail and causes wear and shortened life of the pressure relief valve. The first plunger has at least one relief passage or groove located on an exterior surface, relieving the undesirable pressure buildup from a chamber formed between the valve body and the first plunger, eliminating undesirable liftoff events.