Todd Z Forrest

US Patent:

20090065447, Mar 12, 2009

Filed:

Sep 12, 2007

Appl. No.:

11/854019

Inventors:

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
Gerard 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

Assignee:

CUMMINS FILTRATION IP, INC. - Minneapolis MN

International Classification:

B01D 29/60
B01D 27/08

US Classification:

210767, 210418, 210440

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.