24-01-2019 дата публикации
Номер: US20190024330A1
Принадлежит:
A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatatable to steer a wheel, and a speed bar pivotable to control the propulsion system. 1. A self-propelled cart comprising:a chassis;a drive wheel coupled to an aft end the chassis;a swivel wheel mounted to a forward end of the chassis at a swivel; a hydraulic fluid;', 'a hydraulic pump for pressurizing the hydraulic fluid;', 'a hydraulic motor driven by the hydraulic fluid and connected to the drive wheel; and', 'a valve for controlling flow of hydraulic fluid from the hydraulic pump to the hydraulic motor; and, 'a hydraulic propulsion system mounted to the chassis, the hydrostatic propulsion system comprising a handle rotatable about a first axis;', 'a cable extending from the handle to the swivel wheel;', 'a control lever coupled to the handle and rotatable about a second axis; and', 'a cable extending from the control lever to the valve., 'a steering system comprising2. The self-propelled cart of claim 1 , and further comprising:a spring-biased lever coupled to the chassis to apply rotational bias to the swivel wheel; andan alignment post coupled to the chassis to arrest movement of the spring-biased lever.3. The self-propelled cart of claim 1 , wherein: a carriage having a swivel post connected to the chassis; and', 'a tire mounted to the carriage; and, 'the swivel wheel comprises 'a pair of linkages connecting the handle to the carriage.', 'the steering system further comprises4. The self-propelled cart of claim 3 , wherein the steering system further comprises:a caliper mounted to the swivel post;a centering post extending from the carriage;a stop post connected to the chassis;a caliper mounted to the chassis ...
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