Vacuum cleaner

Details Vacuum cleaner Vacuum cleaner

1990-07-05

1992-08-04

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15351, 154222, 15DIG1, A47L 530

Patent

active

051347520

ABSTRACT:
A vacuum cleaner includes two blowers connected in series, one upstream of the filter and the other downstream.

REFERENCES:
patent: 1611786 (1926-12-01), Serva
patent: 2019895 (1935-11-01), Dow
patent: 2187104 (1940-01-01), Leathers
patent: 2218035 (1940-10-01), Benson
patent: 2468128 (1949-04-01), Sparklin
patent: 3848290 (1974-11-01), Bates
patent: 3872539 (1975-03-01), Doyel
patent: 4195969 (1980-04-01), Whitney
patent: 4225999 (1980-10-01), Martinec et al.
patent: 4793054 (1988-12-01), Abbratozzato et al.

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