Electrohydraulic outrigger control system

Details Electrohydraulic outrigger control system Electrohydraulic outrigger control system

1977-10-06

1978-11-07

Peters, Jr., Joseph F.

Land vehicles

Wheeled

Attachment

180 41, 212145, 254 86H, 254 86R, B60S 910

Patent

active

041242262

ABSTRACT:
A mobile crane having four hydraulically operated outrigger assemblies, two on each side, and each having a horizontal extend cylinder and a vertical stabilizer cylinder, includes a electrohydraulic control system whereby any outrigger assembly can be individually extended, retracted, raised or lowered, and whereby two outrigger assemblies on the same side of the crane can either be extended or retracted together or raised or lowered together. The control system comprises eight selector switches (usable individually or in appropriate combinations) for controlling operation of a double solenoid main control valve which conditions the system for extend or retract operation and for controlling operation of four double solenoid cylinder control valves, each of which controls, alternately, one horizontal extend cylinder and one vertical stabilizer cylinder. Each vertical stabilizer cylinder is provided with a lockout valve to prevent drifting.

REFERENCES:
patent: 3073458 (1963-01-01), Wieschel
patent: 3550506 (1970-12-01), Gardenhour
patent: 3603614 (1968-06-01), Gauchet
patent: 3945666 (1976-03-01), Fritsch
patent: 3958813 (1976-05-01), Carey

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