Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1990-05-22
1992-02-25
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15349, 15352, 55305, A47L 530, A47L 920
Patent
active
050900838
ABSTRACT:
The specification discloses a wheeled commercial carpet vacuum cleaner having wide area coverage, an integral one piece molded polymer housing enclosing a debris hopper with a plurality of inverted filter tubes therabove and enclosed by a filter housing in engagement with the hopper. The open bottom filter tubes are normally retained up in extended condition by springs therein which are compressible under the action of a manually operable depressor plate, plunger and linkage via an external handle, to act as a shaker distorting the tubes to dislodge dirt from the filter inner walls and allow it to fall into the debris hopper. One or more vacuum motors and suction fans are operable connected to the filter housing. A vacuum conduit extends between the area adjacnet a carpet-engaging power brush and the debris hopper. The suction fans pull dirt-laden air from the brush area through the tube and into the hopper, and from there up through the filter tubes. All of these components are enclosed within the vacuum cleaner housing which is of one-piece construction except for the cover and a hopper door through which the hopper is removed for dumping. The filter housing is disengaged and lifted from the hopper with opening of the hopper door.
REFERENCES:
patent: 2077572 (1937-04-01), Lotgren
patent: 3233274 (1966-02-01), Kroll
patent: 3461479 (1969-08-01), Tierney
patent: 3484889 (1969-12-01), McCandless
patent: 3653190 (1972-04-01), Lee et al.
patent: 4032307 (1977-06-01), Sommerfeld
patent: 4716621 (1988-01-01), Zoni
patent: 4819676 (1989-04-01), Blehert et al.
1989 Literature-National Super Service Company, Form 31: 0189.
Undated Literature from Windsor Industries, Inc.
Castex Industries, Inc.
Moore Chris K.
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