Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1997-09-12
2000-05-30
Savage, Matthew O.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210136, 210440, 210450, 210453, 210455, 210DIG17, B01D 35147, B01D 35153
Patent
active
060687630
ABSTRACT:
An improved, reduced waste oil filter has a concave housing having a first end, a fluid inlet port and a fluid outlet port. A concave cover is removably and sealably attached to a second end of the housing providing a closed area with which the inlet and outlet ports communicate. An elongated cylindrical disposable oil filter element is supported within the closed area. The filter element has a perforated center tube, a first end of which detachably communicates with the fluid outlet port, the other end of the center tube being closed. The center tube has a filter media there around so that fluid flow into the closed area through the inlet port flows through the filter media and into the center tube to pass out through the outlet port. The filter element has a length greater than the internal depth of the cover so that when the cover is removed from the housing a portion of the length of the filter element extends exteriorly of the cover to facilitate easy removal and replacement. The housing and cover are intended for long term use, therefore only the disposable filter element itself is discarded. In a preferred arrangement the filter includes bypass and waste reducing anti-drain back valves.
REFERENCES:
patent: 3333703 (1967-08-01), Scavuzzo et al.
patent: 4366837 (1983-01-01), Roettgen
patent: 4906365 (1990-03-01), Baumann et al.
patent: 5589060 (1996-12-01), Gebert et al.
patent: 5753116 (1998-05-01), Baumann et al.
Purolator Products Company
Savage Matthew O.
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