Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1993-12-08
1995-05-30
Moore, Christopher K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15326, 15347, 15412, E01H 108
Patent
active
054190061
ABSTRACT:
An exhauster fan system for a road sweeping machine comprises a rotatable fan, a drive, and a hydrostatic transmission system coupled between the drive and a spindle on which the fan is mounted. The output of the transmission system is controlled to apply a constant torque to the fan spindle. The transmission system comprises a variable displacement pump coupled to drive a fixed displacement motor. A pressure control is associated with the pump to control hydraulic oil flow in the pump to sustain a set pressure in the motor. The pressure control is selectively operable to provide different set pressures to the motor for different operating conditions. The fan is used in the environment of a road sweeping vehicle comprising a chassis, an airtight container mounted on the chassis, at least one suction conduit connected to the container and, positioned within the container, the described exhauster fan system in which the fan creates a high velocity air flow within the suction conduit.
REFERENCES:
patent: 4356589 (1982-11-01), Mealing et al.
patent: 4370776 (1983-02-01), Kullik
patent: 4399585 (1983-08-01), Kullik et al.
patent: 4555826 (1985-12-01), Rodgers et al.
patent: 4773119 (1988-09-01), Duthie et al.
Johnston Engineering Limited
Moore Christopher K.
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