Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1984-08-27
1986-10-07
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15 83, 15349, E01H 104
Patent
active
046150706
ABSTRACT:
This invention is concerned with a sweeper, meaning a sweeper with a rotary main brush opposite a hopper, and increasing its ability to load light debris, such as paper, dry leaves and the like so that light debris will be propelled farther into the debris hopper. This is done by setting the speed of the main brush at a lower speed for normal operation to effectively throw what may be thought of as heavier material, such as sand, forwardly into the hopper with the speed being such that excessive wear of the brush is avoided and a higher speed of rotation being effected from time to time so that paper, dry leaves and the like, which may be considered lightweight material, are thrown farther into the hopper with the increased speed of the main brush overcoming the air resistance that normally stops such lightweight material which, at normal operation of the brush, tends to pile up in the rear of the hopper. The sweeper uses a vacuum fan to create a suction in the hopper with the vacuum fan also being speeded up with the brush speed increase which assists in loading the lightweight debris in the hopper. Since the increased speed is used for the main brush and vacuum fan only from time to time when light debris is encountered and on a limited basis, the increased brush wear and power consumption caused thereby is tolerable.
REFERENCES:
patent: 3619850 (1971-11-01), Rideout et al.
patent: 3691579 (1972-09-01), Kasper
patent: 3695006 (1972-10-01), Valbona et al.
patent: 3931662 (1976-01-01), Nayfa et al.
patent: 4138756 (1979-02-01), Krier et al.
patent: 4206530 (1980-06-01), Kroll et al.
patent: 4317246 (1982-03-01), Knowlton
Bulletin entitled "250 Power Sweeper" of the Tennant Company, Copyright 1981.
Bulletin entitled "95, 95AA" of the Tennant Company, c. 1983.
Bulletin entitled "360" of the Tennant Company showing Model 360, c. 1984.
Frederick Sherman B.
Grimes Charles E.
Kimzey Paul W.
Moore Chris K.
Tennant Company
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