Woodworking – Special-work machine – Combined
Reexamination Certificate
2004-03-19
2008-11-18
Self, Shelley (Department: 3725)
Woodworking
Special-work machine
Combined
C144S034100, C091S418000, C091S446000
Reexamination Certificate
active
07451790
ABSTRACT:
An arrangement for controlling two drive units which interact with one another, one of which includes a hydraulically driven motor (2). The motor drives a varying load, and one or more valves (6, 7) control hydraulic fluid flow through the motor during operation and for starting and stopping of the motor. One of the valves is a flow control valve (7) for flow control of the hydraulic fluid flow through the motor. The second drive unit (37) performs a working movement which, under the action of hydraulic flow influences the loading of the motor. The flow of the hydraulic fluid to the second drive unit is controlled in a coordinated way with the control of the flow through the motor.
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Sannelius Mikael
Vallebrant Per-Ola
Parker-Hannifin Corporation
Self Shelley
Whitman Daniel J.
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