Filter

Details Filter Filter

1997-05-07

1999-08-17

Reifsnyder, David A.

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

210499, 298966, B01D 2900

Patent

active

059389249

ABSTRACT:
A filter for filtering oil flowing through a fluid flow passage extending through the inside and outside of a plug forming part of a relief valve of a vane pump. The filter comprises a roll-shaped sheet formed of steel sheet spring and taking a generally cylindrical form. The roll-shaped sheet has overlapping first and second end sections, which are opposite to each other in a peripheral direction of the roll-shaped sheet. The roll-shaped sheet is located in the fluid flow passage and fitted on an outer peripheral surface of the cylindrical member. The roll-shaped sheet is formed with many through-holes having the size to allow the fluid to pass through the through-holes but trap particles for removal.

REFERENCES:
patent: 524668 (1894-08-01), Hawkins
patent: 1941982 (1934-01-01), Gill
patent: 3356226 (1967-12-01), Miller, Jr. et al.
patent: 5102436 (1992-04-01), Grabowski
patent: 5169524 (1992-12-01), Meiritz et al.
patent: 5290446 (1994-03-01), Degen et al.
patent: 5599449 (1997-02-01), Gnamm et al.
patent: 5664628 (1997-09-01), Koehler et al.

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