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. 14, 2014
Filed:
Mar. 27, 2010
J. Victor Perr, Greenwood, IN (US);
John T. Carroll, Iii, Columbus, IN (US);
J. Victor Perr, Greenwood, IN (US);
John T. Carroll, III, Columbus, IN (US);
Cummins Inc., Columbus, IN (US);
Abstract
A system includes an internal combustion engine receiving intake air from an intake manifold and providing exhaust gases to an exhaust manifold. The system further includes an exhaust gas recirculation (EGR) conduit fluidly coupling the exhaust manifold to the intake manifold. The system includes a conical spring check valve disposed in the EGR conduit, the conical spring check valve having a helically wound spring including a number of turns of decreasing diameter, where each turn progresses axially in a normal flow direction of the EGR from a previous one of the turns. Each of the turns further overlaps a previous one of the turns.