Fuel filter assembly with flow restriction sleeve

Details Fuel filter assembly with flow restriction sleeve Fuel filter assembly with flow restriction sleeve

2011-08-23

2011-08-23

Drodge, Joseph W (Department: 1778)

Liquid purification or separation

With repair or assembling means

C055S410000, C055S490000, C210S235000, C210S429000, C210S437000, C210S438000, C210S450000

Reexamination Certificate

active

08002981

ABSTRACT:
A “no filter, no run” filtration system that is designed to verify that an appropriate filter cartridge is installed. A flow control sleeve is provided on a standpipe to control the flow of fluid, for example fuel, into the standpipe. The sleeve can be axially moveable between closed and open positions, with one or more members on an installed filter cartridge designed to release the sleeve to permit the movement from the closed position to the open position to allow fluid flow. A spring acts on the sleeve to bias the sleeve back to the closed position upon removal of the filter cartridge. The sleeve can also be designed without axial movement, but nonetheless is configured to be opened and closed to control fluid flow into the standpipe.

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