Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1987-12-10
1989-12-05
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15350, A47L 514
Patent
active
048843156
ABSTRACT:
A closed circuit vacuum apparatus having a nozzle housing which includes a cover and an exterior wall structure to form a housing interior. The housing interior is bisected by a baffle that is spaced apart from the wall structure of the nozzle housing to define an air-recirculation duct therebetween. The inner surface of the baffle defines the dimensions of an evacuation chamber. Preferably, the baffle follows the circumferential contour adjacent to the nozzle wall structure so that the air-recirculation duct completely surrounds the evacuation chamber. An evacuation port in the nozzle housing is in fluid communication with the evacuation chamber, and an exhaust port in the nozzle housing is in fluid communication with the air-recirculation duct. Particle laden air is extracted from the evacuation chamber for passage through the evacuation port to an inlet conduit. The inlet conduit is connected to a filter bag for air filtration prior to recirculation to the air-recirculation duct, whereafter a pressure differential causes the stream of air to return to the evacuation chamber. The stream of air passes through a carpet or the like to be cleaned in progressing from the air-recirculation duct to the evacuation chamber by leakage from the duct.
REFERENCES:
patent: 1383456 (1921-07-01), Farnsworth
patent: 1611786 (1926-12-01), Serva
patent: 2224202 (1940-12-01), Smellie
patent: 2475808 (1949-07-01), Storm
patent: 3484890 (1969-12-01), Case
patent: 3694848 (1972-10-01), Alcala
patent: 4393536 (1983-07-01), Tapp
Moore Chris K.
Schneck Thomas
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