Seal for a spin-on filter

Details Seal for a spin-on filter Seal for a spin-on filter

1986-06-05

1989-05-23

Fisher, Richard V.

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

210443, 210450, 210DIG17, 277168, 277195, 55502, B01D 2708

Patent

active

048328448

ABSTRACT:
Leakage under pressure of fluid through the interface of a filter and a filter head or cover casting during removal of the filter is avoided by the use of a stepped gasket at the interface of the filter and the cover casting. The stepped gasket has both axially facing and radially facing sealing surfaces with the latter serving to maintain a seal at the interface over an extended interval during the removal process, which interval is sufficient to enlarge the volume of the system to eliminate any pressure differential from the interior of the system to the ambient.

REFERENCES:
patent: 2626822 (1953-01-01), Boyd
patent: 3076551 (1963-02-01), Humbert, Jr.
patent: 3557963 (1971-01-01), Offer
patent: 3677413 (1972-07-01), Connor
patent: 3685659 (1972-08-01), Haskett et al.
patent: 3929643 (1975-12-01), Donaldson et al.
patent: 4035306 (1977-07-01), Maddocks
patent: 4045349 (1977-08-01), Humbert, Jr.
patent: 4168237 (1979-09-01), Pickett et al.
patent: 4169058 (1979-09-01), Pickett et al.

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