| 摘要 |
A hydraulic control valve for a single-acting cylinder includes a valve housing having a cylindrical valve bore. A supply port present in the valve housing is in communication with the valve bore, as is a discharge port and a delivery port. A valve pin is slidable within the valve bore between first and second pin positions, the valve pin including a pin groove positionable to establish communication at the first pin position between the supply port and the delivery port to the exclusion of the discharge port. The pin is slidable from the first position to the second position to establish simultaneous communication with the pin groove between the supply port, the discharge port and the delivery port.
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