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:
Nov. 24, 2015
Filed:
Oct. 25, 2012
Applicant:
Caterpillar Inc., Peoria, IL (US);
Inventors:
Selvakumar Duraisamy, Peoria, IL (US);
Kenneth C. Adams, Dunlap, IL (US);
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M 69/50 (2006.01); F02M 63/00 (2006.01); F02M 61/16 (2006.01); F16K 15/04 (2006.01); F16K 17/04 (2006.01); F16K 25/00 (2006.01);
U.S. Cl.
CPC ...
F02M 63/0036 (2013.01); F02M 61/166 (2013.01); F02M 63/005 (2013.01); F16K 15/044 (2013.01); F16K 15/048 (2013.01); F16K 17/0406 (2013.01); F16K 25/005 (2013.01); F02M 2200/9007 (2013.01); Y10T 137/0379 (2015.04); Y10T 137/7922 (2015.04);
Abstract
A pressure relief valve for a common rail fuel system includes a hard ceramic spherical valve member that moves into and out of contact with a conical valve seat of a soft metallic valve body. Fretting damage to the valve is inhibited by using the dissimilar materials, and by using a guide pin that is allowed to move on the spherical surface of the ceramic spherical valve member. The valve member may be constructed of silicon nitride.