Liquid filter assembly

Details Liquid filter assembly Liquid filter assembly

1989-12-03

1992-05-12

Spear, Frank

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

210132, 210316, B01D 2710

Patent

active

051124769

ABSTRACT:
A filter assembly for filtering the lubricating oil of an internal combustion engine includes a filter base, a cover for the filter base, and a spin-on filter cartridge attached to the filter base by way of a conventional threaded mounting stud. A filter screen is clamped between the cover and filter base and is of a sufficient mesh size to trap large particles that can be examined by tbe human eye, thereby permitting smaller particles to pass through the screen and to be trapped in the filter cartridge. When the screen becomes clogged, a relief valve opens a bypass passage permitting all lubricating oil to flow directly into the filter cartridge.

REFERENCES:
patent: 2253685 (1941-08-01), Burckhalter
patent: 2770368 (1956-11-01), Tischer
patent: 3168470 (1965-02-01), Rhoda
patent: 4349434 (1982-09-01), Jaworski

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