Apparatus for controlling lifting operation

Details Apparatus for controlling lifting operation Apparatus for controlling lifting operation

1995-12-28

1997-12-02

Nguyen, Hoang

Power plants

Pressure fluid source and motor

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

60427, 60429, 60430, F16D 3102

Patent

active

056923775

ABSTRACT:
An apparatus for controlling the lifting operation comprising an operation mode selection switch which is selectively set to an ordinary operation mode or to a lifting operation mode and a hydraulic circuit isolating means. The hydraulic circuit isolating means isolates the hydraulic circuit into a running drive hydraulic circuit which feeds the pressurized fluid of one of the variable-capacity hydraulic pumps to the actuators of the running apparatuses when the operation mode selection switch is set to the lifting operation mode and a hydraulic circuit for driving the apparatus on the side of the turning body, which feeds the pressurized fluid of the other variable-capacity hydraulic pump to the actuators other than those of the running apparatuses.

REFERENCES:
patent: 3922855 (1975-12-01), Bridwell et al.
patent: 4570441 (1986-02-01), Yoshida et al.
patent: 4768339 (1988-09-01), Aoyagi et al.
patent: 5029067 (1991-07-01), Nishida et al.
patent: 5083928 (1992-01-01), Kubomoto et al.
patent: 5335494 (1994-08-01), Benko et al.

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