Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1984-02-27
1985-10-29
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
210111, 210112, 210391, B01D 2938
Patent
active
045499616
ABSTRACT:
The reverse flow cleaning process is initiated either automatically by a timing or pressure sensitive device, or manually, by opening an outlet which allows the flow of water, thereby creating a pressure difference. The pressure difference not only creates a reverse flow from the clean to the dirty filter side, but also moves a wiping element having a smaller inlet area than the surface of the filter across the latter surface at a controlled speed. The return of the wiper element to the original position is accomplished either by a spring or hydraulic reset element. Damping is provided to insure that the motion of the wiper is a slow, steady motion. In a special construction, the wiper element consists of a multiplicity of individual elements elastically pressed against the inside, dirty side of a hollow cylindrical filter. The wiper elements are mounted in a piston-like element which moves in response to the pressure difference carrying the wiper elements with it.
REFERENCES:
patent: 3853762 (1974-12-01), Moatti
patent: 3994810 (1976-11-01), Schaeffer
patent: 4090962 (1978-05-01), Braukmann
patent: 4271019 (1981-06-01), Galletti
patent: 4295963 (1981-10-01), Drori
Bellemann Rudolf
Diehlmann Rolf
Dobrocsi Bela
Wacker Karl F.
Adee John
Joh. A. Benckiser Wassertechnik GmbH
Teltscher Erwin S.
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