Construction machinery

Details Construction machinery Construction machinery

2005-02-08

2005-02-08

Will, Thomas B. (Department: 3671)

Excavating

Ditcher

Condition responsive

C037S414000, C060S431000, C060S420000, C703S007000

Reexamination Certificate

active

06851207

ABSTRACT:
First and second hydraulic pumps each adapted to operate plural actuators are activated by separate electric motors respectively. In accordance with signals provided from a controller on the basis of operations of levers, the number of revolutions of the electric motor and that of the electric motor are controlled each independently and simultaneously to control the discharge rates of both hydraulic pumps.

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