Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1980-07-18
1982-08-10
Roberts, Edward L.
Brushing, scrubbing, and general cleaning
Machines
Brushing
298 11, 298 22C, E01H 104
Patent
active
043430600
ABSTRACT:
A street sweeper having a frame with a cab carried thereon. An engine is mounted on the frame for powering the sweeper. A series of operating mechanisms are supported on the frame for assisting in a sweepings pick-up operation. A series of hydraulic motors are provided with each being operatively associated with one of the mechanisms for operating the same. A single variable and reversible flow piston pump is operatively connected to the hydraulic motors and the hydraulic mechanisms for operating them at a constant speed. The engine operates the piston pump with a variable speed input. A control mechanism is mounted in the cab, and electrical circuit means is connected between the control mechanism and the piston pump and cooperable with said control mechanism enabling for selective operation of the mechanisms at selective rotational speeds for assisting in a sweepings pick-up operation.
REFERENCES:
patent: 2833116 (1958-05-01), Rush
patent: 3802022 (1974-04-01), Fleming
patent: 3833961 (1974-09-01), Fortman et al.
patent: 3837029 (1974-09-01), Kasper
patent: 4138756 (1979-02-01), Krier et al.
patent: 4171551 (1979-10-01), Hildebrand et al.
patent: 4178647 (1979-12-01), Wolynec et al.
Hildebrand Donald L.
Prescott Ernest F.
Elgin Sweeper Company
Roberts Edward L.
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