Rotary self-cleaning strainer simultaneously cleaned and rotated

Details Rotary self-cleaning strainer simultaneously cleaned and rotated Rotary self-cleaning strainer simultaneously cleaned and rotated

1990-04-09

1992-04-28

Dawson, Robert A.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Filter cleaning

210155, 210161, 210232, 210409, 210460, 210338, 239723, 405 43, B01D 33073

Patent

active

051085925

ABSTRACT:
A rotary self-cleaning strainer comprises a circular cylindrical walled pipe on which a circular cylindrical filter screen assembly is journaled for rotation. The pipe has an intake that is surrounded by the filter screen assembly and a discharge that is connected to a pump. When the strainer is placed in a body of water that is to be pumped, water is drawn through the screen that forms the sidewall of the filter screen assembly and enters the intake of the pipe. The filtered water is conducted through the PVC pipe and to the pump. Two sets of nozzles disposed within the filter screen assembly are supplied with return water through a supply line tapped into the pump outlet. The water is forcefully emitted against the screen to both rotate the screen assembly and dislodge adhering debris from the exterior of the screen. Each set of nozzles is 180 degrees from the other so that each acts upon a limited zone of the screen. The use of two nozzle sets enables the strainer to be effective in certain existing systems without having to increase the water pressure to be strained beyond the prevailing system pressure.

REFERENCES:
patent: 2646888 (1953-07-01), Schichtl
patent: 3242872 (1966-03-01), Thompson
patent: 4045345 (1977-08-01), Drori
patent: 4053413 (1977-10-01), Miller
patent: 4261822 (1981-04-01), Richardson
patent: 4271018 (1981-06-01), Drori
patent: 4317539 (1982-03-01), Pollock
patent: 4626129 (1986-12-01), Kothmann et al.
patent: 4655910 (1987-04-01), Tabor
patent: 4822486 (1989-04-01), Wilkins et al.

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