Filter condition responsive device compensated for changes in me

Details Filter condition responsive device compensated for changes in me Filter condition responsive device compensated for changes in me

1972-09-27

1977-09-27

Cuchlinski, Jr., William A.

Measuring and testing

With fluid pressure

Porosity or permeability

55270, 55274, 116114R, G01N 1508

Patent

active

040502910

ABSTRACT:
A filter condition responsive apparatus for a range or stove vent system containing a first filter for filtering grease and a second series connected filter for the removal of odors. A first pressure responsive device responds to the pressure drop across the grease filter to provide an output indicative of the collection of grease on the filter. A second pressure responsive device responds to the pressure drop across the second filter to provide an output indicative of the flow of air through the filter. The output of the two devices are connected to provide an indication of the condition of the grease filter independent of any change in air flow.

REFERENCES:
patent: 2650496 (1953-09-01), Middleton et al.
patent: 3172747 (1965-03-01), Nodolf
patent: 3359797 (1967-12-01), Preller
patent: 3466925 (1969-09-01), Ziegenhagen
patent: 3680377 (1972-08-01), Lightner
patent: 3771365 (1973-11-01), Schempp

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