Service recording device for a filter of an extraction hood

Details Service recording device for a filter of an extraction hood Service recording device for a filter of an extraction hood

2007-12-11

2007-12-11

Hopkins, Robert (Department: 1724)

Gas separation: apparatus

With signals, indicators, measuring, or testing means

Light signal

C096S419000, C096S422000, C096S424000, C055SDIG036

Reexamination Certificate

active

10858667

ABSTRACT:
A service recording device for a filter is particularly suited for an extraction hood with an air flow device with a variable volumetric flow. The service recording device has a counter device with a variable counting speed. The counting speed of the air flow device is thus a function of the volumetric flow of the air flow device.

REFERENCES:
patent: 6203590 (2001-03-01), Byrd et al.
patent: 28 16 406 (1979-10-01), None
patent: 78 13 240 (1979-10-01), None
patent: 28 52 472 (1980-06-01), None
patent: 0 094 360 (1983-11-01), None

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