Filter condition indicator having moveable sensor and aggregate

Details Filter condition indicator having moveable sensor and aggregate Filter condition indicator having moveable sensor and aggregate

1989-12-08

1992-02-18

Dawson, Robert A.

Liquid purification or separation

Processes

Separating

7386152, 210 87, 210192, 210806, 340606, 34082565, B01D 35143

Patent

active

050891448

ABSTRACT:
A fluid filter monitoring system. A flow switch positioned in juxtaposition to a fluid flow path monitors fluid flow and provides an indication during those time periods when fluid is flowing at a rate exceeding a predetermined flow rate through the flow path. A monitoring circuit coupled to this indication provides various audible and/or visible indicators corresponding to detected conditions. The preferred design includes a timer for monitoring the time duration since the filter was installed as well as monitoring the time duration water or other fluids are flowing through the filter. Adjustably settable visible and/or audible indications are provided to indicate when the filter is reaching the end of its useful life as well as when this life period has been exceeded.

REFERENCES:
patent: 329064 (1885-10-01), Moore
patent: 3540030 (1970-11-01), Hartz
patent: 3585596 (1971-06-01), Rosenblatt
patent: 4272368 (1981-06-01), Foord et al.
patent: 4310828 (1982-01-01), Baker
patent: 4321461 (1982-03-01), Walter, Jr. et al.
patent: 4431533 (1984-02-01), Wrede
patent: 4522077 (1985-06-01), Koberle
patent: 4623451 (1986-11-01), Oliver
patent: 4708790 (1987-11-01), Bray
patent: 4918426 (1990-04-01), Butts et al.

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