Flow control sensor and method for filling of a filter press

Details Flow control sensor and method for filling of a filter press Flow control sensor and method for filling of a filter press

1999-01-08

2000-10-17

Freay, Charles G.

Pumps

Condition responsive control of pump drive motor

By controlling drive motor motive fluid

417 63, 417 53, 137538, F04B 4900

Patent

active

061321761

ABSTRACT:
An air flow sensor and method for filling a filter press which detects slowing and/or intermittent stoppage of the feed pump and signals a controller associated with a pressure regulator to increase the pressure of the air supplied to the feed pump. The air flow sensor includes a spring-biased piston slidably movable within a housing, which piston defines a flow passage therein and carries a magnet thereon. A switching device is mounted on the housing and detects the position of the piston magnet, and when the piston approaches the closed position, the switching device transmits a signal to step-up the air pressure to the feed pump.

REFERENCES:
patent: 3943969 (1976-03-01), Rubin et al.
patent: 4118778 (1978-10-01), Strub
patent: 4181615 (1980-01-01), Wilms
patent: 5002090 (1991-03-01), Ichikawa et al.
patent: 5144977 (1992-09-01), Eggerton et al.
patent: 5275740 (1994-01-01), Spyker et al.
"Pump Dynamics", pp. 2 and 3.
"Specialty Diaphragm Pumps", p. 20.
"M8 Metal Pump", p. 15 and "M4 Metal Pump", p. 14.
Product Information JWI.RTM. Bulletin, "New Improved! JWI.degree. APCS" .COPYRGT.JWI.RTM. 1995, Holland, Michigan, U.S.A. 5/95/200 (one page).
ARO brochure, Diaphragm Pump cycle Sensor Kit, Feb. 1998 (one page).
ARO Operating Manual, Nov. 26, 1997 (4 pages).
Omega Technology Company, "Flow and Level Handbook", 1990, pp. B-57 and B-58.

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