Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1982-03-11
1984-03-20
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
A47L 534
Patent
active
044372051
ABSTRACT:
A vacuum cleaner nozzle lift device for adjustably raising the front portion of the nozzle. The device includes a U-shaped front wheel assembly including a support having a rear bight pivotally mounted to the nozzle housing, a pair of forwardly extending legs, and wheels rotatably carried on the forward distal end portions of the legs. The front wheel height adjuster includes a lifter slidably embracing a leg of the support forwardly of the bight, the lifter being mounted to a rear portion of the housing adjacent the bight, a cam follower movable with the lifter, and a cam movably carried by the housing for camming engagement with the cam follower. A user-operated foot pedal selectively moves the cam against the cam follower for correspondingly swinging the support about the axis of the bight to selectively raise and lower the front wheels and thereby adjust the angular disposition of the nozzle housing relative to the subjacent surface.
REFERENCES:
patent: 2067990 (1937-01-01), Taylor
patent: 2734217 (1956-02-01), Brace
patent: 3217351 (1965-11-01), Hayba
patent: 3608333 (1971-09-01), Selley et al.
patent: 3654661 (1972-04-01), Scott
patent: 3909874 (1975-10-01), Clowers et al.
patent: 3936903 (1976-02-01), Johnson
patent: 4199839 (1980-04-01), Martinec
Moore Chris K.
Whirlpool Corporation
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