OIL FILTER Russian patent published in 2004 - IPC

FIELD: automotive industry; internal combustion engines. SUBSTANCE: invention relates to oil filters of internal combustion engines. Proposed oil filter consists of base with central projecting part, central threaded hole and oil inlet holes. Filtering element and antidrain valve are installed in filter housing. Two rows of holes made in base and making of bypass valve in front part of filter over one row of holes preclude getting of contaminated oil and dirt accumulated on surface of filtering element and in filter space into engine. Making of holes of bypass valve and central hole in base in one plane, without part projecting from inner side of base, provides uninterrupted passing of oil into engine at operation of bypass valve, thus forming a simple structure. Housing of bypass valve can be made either of metal or of elastic material which provides good sealing between filtering element and base. EFFECT: prevention of getting of dirt from filter space into engine, provision of constant quality cleaning of oil, increased service life of engine. 3 cl, 2 dwg