Hydraulically operated four wheel sweeper

Details Hydraulically operated four wheel sweeper Hydraulically operated four wheel sweeper

F - Mech Eng,Light,Heat,Weapons

16

H

180/39, 15/79

F16H 61/46 (2006.01) F16H 61/42 (2006.01)

Patent

CA 1243812

-29- ABSTRACT OF THE DISCLOSURE A hydrostatically operated vehicle, such as a street sweeper, includes an engine driven reversible hydrostatic pump coupled to a single hydrostatic pump driving wheels of the vehicle. The pump is shiftable from neutral to reverse and forward, low and high speed positions, and the hydrostatic motor is controlled between low and high speed positions with a metering valve automatically adjusting the motor speed in response to variation in reaction torque between the drive wheels and the ground. The vehicle also includes a reversible hydrostatic component drive system for powering motors which drive an elevator, pick-up broom and two gutter brooms in a forward working direction and which may be reversed for clearing debris jams by reversing the pump. The component drive system in- cludes valve means for selectively driving the gutter brooms and for holding the gutter brooms inactive when the pump is driven in reverse.

454400

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