Device for automatically controlling the suction power of a vacu

Details Device for automatically controlling the suction power of a vacu Device for automatically controlling the suction power of a vacu

1983-03-09

1985-05-07

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15339, A47L 928

Patent

active

045148740

ABSTRACT:
A device for automatically controlling the suction power of a vacuum cleaner, in which at least one diaphragm-actuated vacuum switch is so arranged in the vacuum region of the vacuum cleaner that, depending on the variation in the air pressure as a result of external operating conditions, a contacting is produced which leads to a switching of the speed control range of the vacuum cleaner motor. The switching of the instantaneous suction power takes place in steps, two diaphragm switches having three contacts each being preferably provided.

REFERENCES:
patent: 1904973 (1933-04-01), Smellie
patent: 2764256 (1956-09-01), Allen
patent: 2789660 (1957-04-01), Brown
patent: 3069068 (1962-12-01), Hansen
patent: 4021879 (1977-05-01), Brigham
patent: 4199838 (1980-04-01), Simonsson
patent: 4370776 (1983-02-01), Kullik

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