Gas separation: processes – With recording or signaling condition
Patent
1997-05-02
1998-09-22
Smith, Duane S.
Gas separation: processes
With recording or signaling condition
55DIG34, 96397, 96417, B01D 4646
Patent
active
058109080
ABSTRACT:
An air filtering apparatus including motor selectively connected to a power source, a fan driven by the motor and creating an air flow, a replaceable filter element selectively positioned in the air flow path, and an electronic control. The electronic control includes a clogged filter element detector and an indicator and a missing filter element detector. The current drawn by the fan motor is sensed by a current transformer and compared to a predetermined threshold by a comparator in each detector. If the current drawn by the fan motor is less than the clogged filter element predetermined threshold, the clogged filter element detector operates an indicator. If the current drawn by the fan motor is greater than the missing filter element predetermined threshold, the missing filter element detector operates a controller to disconnect the fan motor from the power source.
REFERENCES:
patent: D310412 (1990-09-01), Fukumoto et al.
patent: D323210 (1992-01-01), Wortham
patent: D328637 (1992-08-01), Muller et al.
patent: D343677 (1994-01-01), Gyori et al.
patent: D344791 (1994-03-01), Cunning
patent: D349566 (1994-08-01), O'Grady
patent: D350191 (1994-08-01), Tsuji
patent: D377523 (1997-01-01), Marvin et al.
patent: 2715452 (1955-08-01), Kent
patent: 2853155 (1958-09-01), Peter
patent: 3232030 (1966-02-01), Owenmark
patent: 4894071 (1990-01-01), Klein
patent: 5461368 (1995-10-01), Comer
Gray Edward G.
Seaman John W.
Bemis Manufacturing Company
Smith Duane S.
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