Vacuum cleaner having a liquid medium filter

Details Vacuum cleaner having a liquid medium filter Vacuum cleaner having a liquid medium filter

1991-03-11

1993-04-27

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

55216, 55250, 55472, A47L 918

Patent

active

052050149

ABSTRACT:
A vacuum cleaner has wet and dry modes. In dry mode, air containing dust is passed through a multi-stage filter including adjacent subchambers containing a liquid for removing microscopic dust from the incoming air. The liquid is prevented from being exhausted from the vacuum cleaner with the exhausted air and is returned to the subchambers. In wet mode, a float and float guide cause a difference in pressure when the vacuum cleaner is filled with liquid. The pressure difference is sensed to actuate an electric circuit breaker to prevent overflow.

REFERENCES:
patent: 1838512 (1931-12-01), Wilson
patent: 2406278 (1946-08-01), Worth
patent: 2468934 (1949-05-01), Kleyn
patent: 2527439 (1950-10-01), McGuire
patent: 2673619 (1954-03-01), Martin
patent: 3173164 (1965-03-01), Congdon
patent: 3180071 (1965-04-01), Nolte
patent: 3286444 (1966-11-01), Boswinkle et al.
patent: 3748834 (1973-07-01), Ruby
patent: 4776060 (1988-10-01), Chang

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