Indicating device for vacuum cleaners

Details Indicating device for vacuum cleaners Indicating device for vacuum cleaners

1978-09-11

1980-04-29

Moore, Christopher K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

55274, 73717, A47L 928

Patent

active

041998383

ABSTRACT:
An indicating device for a vacuum cleaner having means which operates as a result of the pressure difference between the inside of a filter dust container and the outside thereof and is provided with means for communicating the degree of clogging of the dust container through a signalling device in the form of a light source or light sources that gives a visual indication of the amount of clogging of the paper dust container.

REFERENCES:
patent: 3172743 (1965-03-01), Kowalewski
patent: 3177635 (1965-04-01), Cawl et al.
patent: 3587515 (1971-06-01), Anderson
patent: 4021879 (1977-05-01), Brigham
patent: 4100878 (1978-07-01), Leinfelt

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