Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1989-03-07
1991-06-11
Stinson, Frankie L.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15321, 137205, 4664, A47L 538
Patent
active
050221140
ABSTRACT:
A device for suctioning up and removing a contaminated liquid, especially dirty water, with a vacuumized tank having at the top at least one vacuum connection that communicates with a suction fan and a suction connection that communicates with a supply hose and at the bottom at least one outlet that can be closed off to prevent air from entering from outside. An outlet mechanism downstream of the outlet and controlled by the pressure of the air in the vacuumized tank keeps the liquid flowing out through the outlet even when there is a vacuum in the vacuumized tank at least for a prescribed length of time, during which it ensures that the outlet pressure represented by the sum of the liquid's hydrostatic pressure and the pressure of the air in the vacuumized tank is as high or higher than the counteracting air pressure downstream of the outlet.
REFERENCES:
patent: 2497435 (1950-02-01), Brannem
patent: 4641392 (1987-02-01), Huisma
patent: 4691407 (1987-09-01), Sloan et al.
patent: 4766637 (1988-08-01), Winnicki
patent: 4823428 (1989-04-01), Sevigny
Kauffeldt Horst
Kauffeldt Thomas
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