Hydraulic charge boost system for a gantry crane

Details Hydraulic charge boost system for a gantry crane Hydraulic charge boost system for a gantry crane

1997-07-10

1999-08-17

Ryznic, John E.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of...

60475, 60486, F16D 3102

Patent

active

059376465

ABSTRACT:
In a hydraulic cylinder actuation system for a crane having a conventionally charged main hydraulic pump, a supplemental pump or "charge boost" pump is provided. To efficiently achieve fast actuation speeds of the cylinder, the charge boost pump provides supplemental charge flow in response to a need in the system. The charge boost pump is driven independently from the main pump or may be driven by the main pump if the main pump is equipped with drive thru capability to provide a variable output and preferably includes a load sensing means for controlling the output.

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