Sweeping machine with variable wheel tracking

Details Sweeping machine with variable wheel tracking Sweeping machine with variable wheel tracking

2002-11-19

2010-06-15

Wilson, Lee D (Department: 3727)

Brushing, scrubbing, and general cleaning

Machines

Brushing

C015S078000, C180S444000

Reexamination Certificate

active

07735176

ABSTRACT:
A compact sweeping vehicle has steerable front wheels of variable track with a minimum track dimension for sweeping and a maximum track dimension for travel to and from the workplace. The front wheels are steerable and independently driven by hydraulic motors and are each supported on extendable parts of a telescopic axle beam which is supported on trailing arms supported by ball joints from the chassis of the vehicle. The extendable parts are extended and retracted by track change cylinders and steering is by a hydraulic cylinder extending between the axle beam and a steering arm of a bell crank lever for one of the wheels, which is connected by a forwardly extending drag link to a bell crank forming part of a steering relay mechanism which is connected by a cross link to a second bell crank lever, one arm of which is connected to a rearwardly extending drag link to a steering arm of the other wheel.

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