Relief valve for filter device

Details Relief valve for filter device Relief valve for filter device

1998-04-23

2000-10-24

Savage, Matthew O.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid pressure responsive by-pass

210136, 210428, 210440, 1375124, B01D 35147, B01D 35153

Patent

active

061361836

ABSTRACT:
A relief valve for an oil filter device integrally formed with a check valve has an annular shape, and has a front end portion, a guiding portion, a sealing portion, a recess portion, and a groove portion. The relief valve is attached to a protector only by inserting a cylindrical protector end portion into the groove portion thereof. At this time, the recess portion is elastically deformed so that the sealing portion moves inwardly, while the sealing portion is elastically compressed by the protector end portion. As a result, the relief valve closes an oil flow passage defined in a wall of the protector end portion only by an elastic deformation stress thereof. The relief valve can be readily molded and attached to the oil filter device and stably provide desired valve opening characteristics.

REFERENCES:
patent: 3567023 (1971-03-01), Buckman et al.
patent: 3640390 (1972-02-01), Goy et al.
patent: 3785491 (1974-01-01), Dudinec et al.
patent: 4144168 (1979-03-01), Thornton
patent: 5114572 (1992-05-01), Hunter et al.
patent: 5405527 (1995-04-01), Covington
patent: 5876600 (1999-03-01), Matsubara et al.
Hiroshi Morishita, "Oil Filter", Journal of Nippondenso Technical Disclosure, No. 102-008, May 15, 1995.

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