Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1986-08-25
1987-09-22
Spear, Frank
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210340, 210440, B01D 2708
Patent
active
046953779
ABSTRACT:
An oil filter attaches to an internal combustion engine and filters the oil that is circulated through the engine. The filter includes a first can and a second can that may be attached together or separated apart. The first can attaches to the engine, and it has a first inlet and a first outlet for receiving oil from and transmitting oil to the engine. It also has a second inlet and a second outlet for receiving oil from and transmitting oil to the second can. The second can sealably attaches and detaches from the first can and, when attached, the second outlet of the first can is connected to an inlet of the second can, and an outlet of the second can is sealably connected to the second inlet of the first can. Filters are disposed within the two cans and flow directing apparatus is provided to direct the oil from the engine, through the two filters in series and back to the engine.
REFERENCES:
patent: 2098725 (1937-11-01), Hurn
patent: 2318276 (1943-05-01), Worthington
patent: 3344923 (1967-10-01), Pall et al.
patent: 3390778 (1968-07-01), Uhen
patent: 3552553 (1971-01-01), Reading
patent: 3586171 (1971-06-01), Offer
patent: 3975273 (1976-08-01), Shaltz
patent: 4272371 (1981-06-01), Moses
patent: 4640772 (1987-02-01), Graham
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