Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1992-10-09
1993-10-26
Sever, Frank
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210168, 2104165, 210418, 210450, B01D 35147
Patent
active
052562808
ABSTRACT:
A liquid filter includes an annular filter cartridge and a combination anti-drain back and relief valve assembly. The combination valve includes a valve seat from which axially extending arms extend and a spring retainer and spring which holds a gasket against the valve seat. The gasket includes an anti-drainback portion which projects from the valve seat and a relief valve portion which is supported on the valve seat. Upon assembly the combination valve and filter element in the housing, the filter assembly is supported by the spring retainer and is forced into sealing engagement with the gasket, holding the latter against the valve seat in a gasket engaging area between the relief valve portion and the anti-drainback portion. This assembly process also removes the coil spring load from the barbs on the valve seat arms. The spring retainer is designed such that the range of movement relative to the valve seat is limited during handling before and during assembly of the liquid filter, thereby preventing over compression of the spring so that the spring force is consistent, thereby resulting in a consistent opening pressure of the relief valve.
REFERENCES:
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Anderly Glenn C.
Machado Joseph
Allied-Signal Inc.
Antonis William N.
Decker Ken C.
Sever Frank
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