Liquid purification or separation – With drip – overflow or content draining feature
Patent
1990-10-10
1991-07-09
Dawson, Robert A.
Liquid purification or separation
With drip, overflow or content draining feature
210349, 2104164, 2104165, 210418, 210430, 210440, 2104971, B01D 2710, B01D 35153
Patent
active
050303457
ABSTRACT:
A filter for liquids is disclosed, which has a base with a central inlet, and an outlet, a central post with a filtering element surrounding and sealing therewith, a cannister enclosing the element and releasably sealed to the base, a passageway in the post, which is sealed to the inlet, and which has means to permit upward flow but inhibit downward flow or drip. This retains the liquid in the cannister and element when drawn upwardly, to prevent drip or spillage, or when lowered to provide a full prime. A method of removing the filtering element without drip, and a method of installing a primed element are also disclosed.
REFERENCES:
patent: 2094457 (1937-09-01), Lattner
patent: 2978107 (1961-04-01), Gutkowski et al.
patent: 3071251 (1963-01-01), Szwargulski
patent: 3507391 (1970-04-01), Rosaen
patent: 4077876 (1978-03-01), Southall
patent: 4222875 (1980-09-01), Sikula, Jr.
patent: 4256576 (1981-03-01), Rose et al.
patent: 4529514 (1985-07-01), Gruett
patent: 4818397 (1989-04-01), Joy
Dawson Robert A.
Lane Hadd S.
Millard Wanda L.
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