Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1987-10-06
1989-02-21
Lacey, David L.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
210232, 2103331, 210390, 210393, 210427, 137505, 13750515, 13750525, 137508, B01D 2938
Patent
active
048062170
ABSTRACT:
A filter device comprises a central tube, a housing enclosing the central tube and defining an internal chamber therewith, and a filter body within the internal chamber. The central tube includes a plug between the inlet and outlet which directs the fluid to flow from the inlet through the filter body and out through the outlet. The housing and filter body are mounted for sliding movement axially of the central tube from a normal filtering position wherein the housing inlet communicates with the upstream side of the filter body, to a back-flushing position wherein the inlet communicates with the downstream side of at least a portion of the filter body. The housing may also include a valve member moved therewith under differential pressure between the housing inlet and outlet to regulate the pressure at the outlet.
REFERENCES:
patent: 2002717 (1935-05-01), Robart et al.
patent: 2488649 (1949-11-01), Teague
patent: 3368680 (1968-02-01), Bozek
patent: 3542202 (1970-11-01), Ball
patent: 3890999 (1975-06-01), Moskow
patent: 4271018 (1981-06-01), Drori
patent: 4295963 (1981-10-01), Drori
patent: 4474207 (1984-10-01), Rosenberg
patent: 4561465 (1985-12-01), Rogers
patent: 4592839 (1986-06-01), Rosenberg
Anderson Andrew J.
Barish Benjamin J.
Lacey David L.
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