End of life monitor for a gas filter

Details End of life monitor for a gas filter End of life monitor for a gas filter

1997-05-22

1998-06-02

Warden, Jill

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 83, 422 87, 422119, 340607, 116208, 116215, 116303, G08B 2100

Patent

active

057594929

ABSTRACT:
An end of life monitor apparatus for a filter that removes an undesirable gas including: (a) an elastic material, which degrades in the presence of the undesirable gas; (b) a support member coupled to the elastic material; and (c) an indicator component movable to a filter end life position, coupled to the elastic material, whereby the elastic material is stretched between the support member and the indicator component, wherein the indicator component is biased to move to the filter end life position but is restrained by the elastic material from moving to the filter end life position, wherein degradation of the elastic material allows the indicator component to move to the filter end life position.

REFERENCES:
patent: 4388274 (1983-06-01), Rourke et al.
patent: 4421719 (1983-12-01), Burleige
patent: 4684380 (1987-08-01), Leichnitz
patent: 4821671 (1989-04-01), Bogardt
patent: 4939543 (1990-07-01), Barker
patent: 5128110 (1992-07-01), Soga et al.
patent: 5151251 (1992-09-01), Solcia et al.
patent: 5531180 (1996-07-01), Bianchini

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