Liquid purification or separation – Processes – Separating
Patent
1994-12-23
1996-11-26
Popovics, Robert J.
Liquid purification or separation
Processes
Separating
210741, 210 90, 210136, 2104164, 12317911, 123198C, B01D 3526
Patent
active
055782213
ABSTRACT:
A fuel filter assembly employs a disposable filter cartridge disposed in a housing comprising a container and a cap. The cap comprises a cap member composed of elastomeric material, an externally projecting fuel outlet, and a centrally disposed axially extending conduit. A lower portion of the axial conduit is slidably received by an axial opening in a plate mounted on the top of the filter cartridge. The opening and conduit are dimensioned such that a gap between the opening and the conduit allows fluid flow through the plate. A spring biases the upper part of the cap member away from the filter cartridge. A fuel inlet in the container provides a path for the flow of fuel into the filter assembly. Spherical balls captured in the fuel inlet and fuel outlet act as check valves, preventing the flow out through the fuel inlet and in through the fuel outlet. The filter assembly is primed by pushing the cap member downwards, compressing the spring. Trapped air is expelled through an orifice and the conduit and exits the fuel filter assembly via the fuel outlet. Removing the downwards force allows the spring to return to its normal length, forcing the upper portion of the cap member upwards and creating a low pressure. The low pressure seats the cap assembly ball and unseats the container assembly ball, providing a driving head which causes fuel to flow from the fuel tank to the fuel filter assembly.
REFERENCES:
patent: 4437986 (1984-03-01), Hutchins
patent: 4500425 (1985-02-01), Thornton et al.
patent: 4515690 (1985-05-01), Yasuhara
patent: 5207898 (1993-05-01), Hodgkins
patent: 5362392 (1994-11-01), Jensen
Popovics Robert J.
Stanadyne Automotive Corp.
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