Incremental foot operated height adjuster for upright vacuum cle

Details Incremental foot operated height adjuster for upright vacuum cle Incremental foot operated height adjuster for upright vacuum cle

1990-06-22

1992-02-11

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

280 4324, A47L 534

Patent

active

050865382

ABSTRACT:
A foot operated nozzle height adjusting mechanism for a vacuum cleaner of the type characterized by a housing having a front cleaning nozzle that is pivotable about a pair of front wheels through the change in height of a pair of rear wheels that are secured in a wheel fork pivotally mounted on the housing includes first and second pedals. The first pedal is secured to the wheel fork. The second pedal is provided on a member that is pivotally secured to the housing and includes an adjustment lever extending in a direction substantially normal to the wheel fork. The adjustment lever includes a plurality of spaced teeth. A locking plate is secured to the wheel fork and the spaced teeth of the adjustment lever are adapted to selectively engage the locking plate. A biasing element urges the adjustment lever teeth against the locking plate.

REFERENCES:
patent: 1852100 (1932-04-01), Ballou
patent: 2048518 (1936-07-01), Ray
patent: 2079293 (1937-05-01), Kirby
patent: 2172911 (1939-09-01), Kirby
patent: 2172973 (1939-09-01), Hays et al.
patent: 2214855 (1940-09-01), Holm-Hansen
patent: 2221746 (1940-11-01), Kirby
patent: 2823412 (1958-02-01), Kirby
patent: 3722024 (1973-03-01), Schmitz
patent: 3822436 (1974-07-01), Burgoon
patent: 3875605 (1975-04-01), Fegan
patent: 3909874 (1975-10-01), Clowers et al.
patent: 4078275 (1978-03-01), Baird
patent: 4513472 (1985-04-01), Wells
patent: 4955103 (1990-09-01), Scott et al.

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