Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1973-10-12
1976-03-02
Hornsby, Harvey C.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15345, 15353, A47L 700
Patent
active
039408264
ABSTRACT:
The specification discloses a surface cleaning apparatus having a molded plastic housing and an upwardly and rearwardly projecting casing terminating at a handle, the lower portion of the housing including a forward suction nozzle, opening into a recovery chamber. Suction is generated by a blower at the rear of the recovery chamber and a shield positioned in front of the blower prevents liquid from being drawn from the recovery chamber into the blower. A pump removes liquid in the recovery chamber through a hose which empties into a remote drain. A parallel pump tubing causes recycle of liquid through the pump whenever liquid in the recovery chamber is depleted to prevent dry running of the pump. A set of spray nozzles located in the apparatus just behind the suction nozzle is connected through a hose to a faucet which acts as a remote source of clean water. The clean water supply tubing connects to the nozzles through a positive flow additive injector. The clean water supply tubing is also directly connected to the recovery tank through a bypass tubing so as to further aid in preventing dry operation of the pump and to cause additive flow even when source water pressure is low. The blower is shrouded so that air is evacuated downwardly from the blower into the surface being cleaned. A conveniently located handle switch is wired such that whenever clean water and additive are being sprayed onto the floor, the pump also operates. A separate switch enables one to run the pump only in the event the recovery tank gets too full.
REFERENCES:
patent: 1211948 (1917-01-01), Koster et al.
patent: 1948366 (1934-02-01), Barzen
patent: 3663984 (1972-05-01), Anthony et al.
patent: 3676889 (1972-07-01), Edlin
patent: 3761987 (1973-10-01), Nayfa et al.
patent: 3774260 (1973-11-01), Emus
Hommes Jack L.
Lowder Dale E.
Nise Wilfred C.
Phillips Paul E.
Clarke-Gravely Corporation
Hornsby Harvey C.
Moore C. K.
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