Vacuum cleaning apparatus

Details Vacuum cleaning apparatus Vacuum cleaning apparatus

1978-11-03

1981-01-20

Lacey, David L.

Gas separation

With nonliquid cleaning means for separating media

Solid agent cleaning member movingly contacts apparatus

55283, 55289, 55296, 55299, 55304, 55484, 55DIG3, B01D 4604

Patent

active

042460115

ABSTRACT:
A filter medium for use in a vacuum cleaner is shown with external brush means which is movable across the filter face for cleaning the soil therefrom. The brush means may either be moved manually, by automatic controls, by time switches, by pressure differentials operating in a piston-cylinder arrangement, or by a pressure indicator unit which monitors the clogging condition of the filter. Moreover, control means are provided for protecting the vacuum cleaner drive motor from damage from liquids when liquids may be drawn into the vacuum cleaner.

REFERENCES:
patent: 1240305 (1917-09-01), Brooks et al.
patent: 2405129 (1946-08-01), Bible
patent: 2591567 (1952-04-01), Lofgren et al.
patent: 2633206 (1953-03-01), Bruckner
patent: 3277634 (1966-10-01), Wheaton
patent: 3413779 (1968-12-01), Takahashi et al.
patent: 3521430 (1970-07-01), Vanderlip et al.
patent: 3591888 (1971-07-01), Takeda et al.
patent: 3618297 (1971-11-01), Hamrick
patent: 3731465 (1973-05-01), Ohira et al.
patent: 3797064 (1974-03-01), MacFarland
patent: 3909219 (1975-09-01), Fromknecht

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