Power plants – Pressure fluid source and motor – Servo-motor having externally operated control valve sets...
Patent
1987-02-17
1988-10-25
Look, Edward K.
Power plants
Pressure fluid source and motor
Servo-motor having externally operated control valve sets...
60484, 91424, 91437, 91459, 91466, 91520, 91527, 180132, 180272, 404 84, 404133, F16D 3102
Patent
active
047794186
ABSTRACT:
A hydraulic operated control system for remotely operating a walk-behind soil compactor. A remotely operated three-position valve is connected to the pressure line of the hydraulic system of the soil compactor and serves to control the flow of hydraulic fluid to opposite ends of a hydraulic cylinder unit that is operably connected to a hydraulic pump which operates the speed and direction control for the compactor. The cylinder unit includes a piston that is slidable within the cylinder and the piston is biased to a neutral position by springs. Through remote operation of the valve, hydraulic fluid will be directed to either end of the cylinder to provide direction and speed control for the compactor. A deadman switch is located on the remote control panel and manual release of the deadman switch will open the hydraulic circuit between the opposite ends of the cylinder to prevent fluid from being directed to the cylinder and will enable the springs to return the cylinder to a neutral no speed position. The return line from the cylinder is connected to a second valve which conrols the supply of hydraulic fluid to the steering system for the compactor.
REFERENCES:
patent: 3236049 (1966-02-01), Reinke
patent: 3521450 (1970-07-01), Martin
patent: 3881317 (1975-05-01), Swoager
patent: 3921503 (1975-11-01), Kubik
patent: 3986358 (1976-10-01), Hoffmann
patent: 4077445 (1978-03-01), Wirt
patent: 4156575 (1979-05-01), Konig et al.
patent: 4167855 (1979-09-01), Knapp
patent: 4508014 (1985-04-01), Shoff
Look Edward K.
M-B-W Inc.
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