Hydraulic filter assembly with priority valve

Details Hydraulic filter assembly with priority valve Hydraulic filter assembly with priority valve

2005-06-21

2005-06-21

Cecil, Terry K. (Department: 1723)

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid pressure responsive by-pass

C210S133000, C210S340000, C210S444000, C123S1960AB, C123S1950HC

Reexamination Certificate

active

06908545

ABSTRACT:
A filter module assembly utilizes a priority valve installed in a manifold to allow for continuous filtration of hydraulic fluid up to a predetermined flow value and diverts occasional high flow to a secondary circuit. This arrangement provides both a low pressure drop at a high flow condition and structural integrity (1,000,000 impulse cycles from 0 to 6000 psi) while at the same time may reduce the weight by as much as 50% from a conventional design approach.

REFERENCES:
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patent: 3120490 (1964-02-01), Samson
patent: 3269541 (1966-08-01), Neely
patent: 3270884 (1966-09-01), Bremer
patent: 4038189 (1977-07-01), Dison et al.
patent: 4615800 (1986-10-01), Stifelman et al.
patent: 4783271 (1988-11-01), Silverwater
patent: 5067454 (1991-11-01), Waddington et al.
patent: 5160037 (1992-11-01), LeCour
patent: 6733666 (2004-05-01), Wilkendorf et al.
patent: 20006981 (2000-06-01), None
patent: WO 99/21637 (1999-05-01), None
European Search Report.

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