Seal for injection molded filter body

Details Seal for injection molded filter body Seal for injection molded filter body

1991-06-11

1993-05-11

Dawson, Robert A.

Liquid purification or separation

With repair or assembling means

210238, 210450, 55502, B01D 2708

Patent

active

052098451

ABSTRACT:
A revised sealing structure for an injection molded filter canister, which is resistant to leaks despite the periodic warping of the lid. A nearly square cross-section groove is placed in the body of the filter around the perimeter of the body open end. Within the groove is placed a "lathe cut" gasket; this is an elastomeric gasket having a precision rectangular cross section. On the lid, centered so as to be positioned opposite the groove in the body, and sized to be nearly centered in the groove, is at least one raised, circular ridge. With the addition of the ridge to the lid, in combination with the lathe cut gasket and the revised groove, that the lid may be easily placed in sealing contact with the body, and that the incidence of leaks is substantially eliminated in reinforced plastic molded filters. No special care or skill is needed of the workman in placing and fastening the lid to the filter body to achieve a tight seal.

REFERENCES:
patent: 4172798 (1979-10-01), Kronsbein
patent: 4767530 (1988-08-01), Gilliam et al.
patent: 4855047 (1989-08-01), Firth
patent: 5013434 (1991-05-01), Furrow

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