Multiple lubricating oil filter for internal combustion engines,

Details Multiple lubricating oil filter for internal combustion engines, Multiple lubricating oil filter for internal combustion engines,

1988-04-11

1989-12-05

Jones, W. Gary

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Fluid pressure responsive

210130, 210132, 210136, 210168, 210440, 2104165, 123196A, 123196S, B01D 3514

Patent

active

048850829

ABSTRACT:
The filter according to the invention comprises an outer casing which is provided with an end cover having a connection to the engine lubrication circuit. The outer casing houses a first filter pack or element positioned to be passed through by the engine lubricating oil. A pressure relief valve, which allows the oil to bypass the first filter pack or element in the case of excessive pressure drop, is provided. The pressure relief valve cooperates with a piston element associated with an electrically conducting spring to establish electrical connection between an electrical contact and a part of the filter casing. A second filter pack or element is positioned to filter part of the oil which the pressure relief valve allows to pass when a high pressure drop in the oil flow through the first filter pack or element occurs.

REFERENCES:
patent: 2879892 (1959-03-01), Frakes
patent: 3644915 (1972-02-01), McBurnett
patent: 4265748 (1981-05-01), Villani et al.
patent: 4366837 (1983-01-01), Roettgen
patent: 4655914 (1987-04-01), Wada

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