Material or article handling – Process – Of charging or discharging self-loading or unloading vehicle
Patent
1998-09-25
2000-12-05
Keenan, James W.
Material or article handling
Process
Of charging or discharging self-loading or unloading vehicle
414513, 414517, B60P 100
Patent
active
061557765
ABSTRACT:
A method of controlling movement of an ejector plate and a tailgate which are operatively associated with a receptacle of a work machine is disclosed. The method includes the step of supplying pressurized fluid via a first fluid line to (i) a first intake port of a multi-stage cylinder, and (ii) a second intake port of a single-stage cylinder. The method further includes the step of moving the ejector plate a first distance with the multi-stage hydraulic cylinder between from a retracted position toward an extended position in response to the supplying step. The method yet further includes the step of preventing movement of the tailgate during the ejector plate first distance moving step. The method still further includes the step of moving the ejector plate a second distance with the multi-stage hydraulic cylinder toward the extended position in response to the supplying step. The ejector plate second distance moving step is performed after the ejector plate first distance moving step. The method yet further includes the step of moving the tailgate with the single-stage hydraulic cylinder between a closed position and an open position after the ejector plate first distance moving step is performed. A control assembly for a multistage cylinder is also disclosed.
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Caterpillar Inc.
Keenan James W.
LandOfFree
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