Patent · US Active

Filtration system with a variable restriction orifice

US8852443B2 · kind B2 · utility

5Cited by

9References

24Claims

0Family size

Assignee

Cummins Filtration IP, Inc. · US

Inventors

Todd Forrest · Cookeville, US
J. Bruce Schelkopf · Zionsville, US
Ted S. Loftis · Cookeville, US
Barry M. Verdegan · Stoughton, US
Wassem Abdalla · Fishers, US
Mark T. Wieczorek · Cookeville, US
Gerard Malgorn · Quimper, FR
Charles W. Hawkins · Cookeville, US
Chad M. Thomas · Cookeville, US
Joe Saxon · Cookeville, US
Mark Johnson · Cookeville, US
Naren Shaam · Cookeville, US

Key dates

Filing date	Sep 12, 2007
Grant date	Oct 7, 2014
Priority date	—
Expiry date	Oct 15, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2201/316
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.