Hydraulic drive system for a counterweight dolly in counterbalan

Details Hydraulic drive system for a counterweight dolly in counterbalan Hydraulic drive system for a counterweight dolly in counterbalan

1986-11-07

1988-01-05

Look, Edward K.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60484, 60493, 91517, 212196, 212198, F16D 3102

Patent

active

047167297

ABSTRACT:
A hydraulic drive system for counterweight dolly in a counterbalance type crane, including dolly driving wheels supported vertically movably through wheel supporting hydraulic cylinders at the lower portion of the counterweight dolly which is connected to the rear portion of a crane body; a wheel driving hydraulic motor connected to each of the wheels; a support pressure detecting mechanism for detecting a support pressure for each wheel supporting hydraulic cylinder, the support pressure detecting mechanism being provided in a drive circuit for the cylinder; and a mechanism for controlling the driving pressure for the wheel driving hydraulic motor in accordance with a detected value provided from the detecting mechanism.

REFERENCES:
patent: 3679179 (1972-07-01), Praddaude
patent: 4142369 (1979-03-01), Mickelson
patent: 4241803 (1980-12-01), Lauber
patent: 4341149 (1982-07-01), Dezelan
patent: 4540097 (1985-09-01), Wadsworth et al.

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