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:
Oct. 07, 2014
Filed:
Sep. 12, 2007
Todd Forrest, Cookeville, TN (US);
J. Bruce Schelkopf, Zionsville, IN (US);
Ted S. Loftis, Cookeville, TN (US);
Barry Verdegan, Stoughton, WI (US);
Wassem Abdalla, Cookeville, TN (US);
Mark Wieczorek, Cookeville, TN (US);
Gérard Malgorn, Quimper, FR;
Charles W. Hawkins, Sparta, TN (US);
Chad Thomas, Cookeville, TN (US);
Joe Saxon, Cookeville, TN (US);
Mark Johnson, Cookeville, TN (US);
Naren Shaam, Cookeville, TN (US);
Todd Forrest, Cookeville, TN (US);
J. Bruce Schelkopf, Zionsville, IN (US);
Ted S. Loftis, Cookeville, TN (US);
Barry Verdegan, Stoughton, WI (US);
Wassem Abdalla, Cookeville, TN (US);
Mark Wieczorek, Cookeville, TN (US);
Gérard Malgorn, Quimper, FR;
Charles W. Hawkins, Sparta, TN (US);
Chad Thomas, Cookeville, TN (US);
Joe Saxon, Cookeville, TN (US);
Mark Johnson, Cookeville, TN (US);
Naren Shaam, Cookeville, TN (US);
Cummins Filtration IP, Inc., Minneapolis, MN (US);
Abstract
Various 'no filter, no run' fuel filtration designs are described that include a variable restriction orifice (VRO) designed to vary the amount of fluid, for example fuel, that reaches a fluid outlet. The VRO has a fully open position at which a maximum non-zero fluid flow is permitted, and a fully closed position at which a limited amount of fluid can flow to the outlet. In the case of diesel fuel, the amount of fuel flow permitted at the fully closed position provides lubrication of downstream fuel system components, for example the fuel pump, but is insufficient to permit engine operation.