Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1979-10-22
1981-06-02
Hart, Charles N.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210421, 210424, 1375991, 13762529, 251175, B01D 2710, B01D 3514
Patent
active
042710200
ABSTRACT:
A valve assembly for a fluid filter includes a rotatable valve spindle movable with respect to the value housing and having first and second channels communicating with the filter, the channels also communicating with first and second bores of the housing when the spindle is in a first position in which fluid flows through the filter. The valve spindle further includes a third channel to provide a bypass around the fluid filter when the spindle has been rotated to a second position. The valve spindle also includes seal means for sealing the first and second bores when in the second or filter bypass position, which means includes a pair of chambers arranged to be aligned with the bores and a seal member within each chamber arranged to seal the respective bores. Each seal member has an aperture providing communication between its chamber and its respective bore to allow fluid to enter and charge the chambers for forcing the seal members against the bores in fluid tight sealing engagement therewith.
REFERENCES:
patent: 3130952 (1964-04-01), Meyer
patent: 3387816 (1968-06-01), Holycross
patent: 3907688 (1975-09-01), Close
Hart Charles N.
Ryder International Corporation
Sadowski David R.
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