OIL FILTER Russian patent published in 2001 - IPC

FIELD: mechanical engineering. SUBSTANCE: oil filter has base with threaded opening and oil admission holes. Base is connected with casing. Spring-loaded filtering member is arranged inside casing cavity. Filter base is further provided with additional row of oil admission holes. Bypass valve mounted above row of additional holes has membrane spring-biased to base and body with drainage preventing valve. Filter of such construction operates so as to provide for independent operation of bypass valve and drainage preventing valve and prevents contaminated oil from penetration from filtering member to frictional surfaces of internal combustion engine parts. EFFECT: wider operational capabilities and enhanced reliability in operation. 2 dwg