Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1988-09-07
1991-10-29
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Brushing
280711, 298 11, E01H 104
Patent
active
050603345
ABSTRACT:
A street sweeper utilizes a vertically extendable mast for elevating its hopper for dumping purposes. Additionally, air springs are provided to the wheel suspension system so that the air springs, when inflated, elevate the chassis and street sweeping system for road travel. When deflated, the chassis is lowered into solid support on the suspension system to provide a more rigid suspension for improved street sweeping and hopper dumping operation. Also, the street sweeper has a conveyor for conveying the dirt from dirt collection means upwardly into the hopper. A second air spring having resilient chamber walls is provided to support the conveyor means in movable relation so that it may be rotated upwardly in travelling position by inflation of the air spring and lowered into operating position by deflation thereof. The conveyor is preferably suspended from the chassis by pivotally hanging links to permit the conveyor to move between raised and lowered positions. Also, the street sweeping system includes a rotary broom which is pivotally carried, and third adjustable air springs are provided to control the vertical position of the broom and its pressure against the ground by the air pressure in the resilient-walled third air springs.
REFERENCES:
patent: 2998264 (1961-08-01), Stump
patent: 3293679 (1966-12-01), Murphy
patent: 4171551 (1979-10-01), Hildebrand et al.
patent: 4856812 (1989-08-01), Stephens et al.
Drawing No. 49080 of Hendrickson Suspension "HA-Single" Axle.
Air Spring No. 1R8-021 Manufactured by Goodyear.
pp. 48-49 of Athey Parts Manual for Models AHL & ABD-Single Engine Sweepers.
Brochure for Two New Masts for Forklifts Manufactured by Olofsson Corp.
Star Roger D.
Strauser Daniel P.
Elgin Sweeper Company
Roberts Edward L.
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