| 摘要 |
PURPOSE:To enable a spool to be stopped at an intermediate position by a method wherein there are provided the first, second and third oil ports communicating with a hydraulic pressure feeding port through the spool. CONSTITUTION:When a spool 1 is st at a left side and a hydraulic pressure is supplied to the oil passage 14, the spool 1 is moved in a rightward direction and further when the spool is set at an intermediate position, the feeding port 3 and the first oil part 5 are communicated to each other through a space C1 between the land 11 and the oil part 5, and the second oil port 5' and the third oil port 6 are communicated to each other through a space C2 between the land 11 and the oil port 5'. Thereby, the spool 1 is stopped at a specified position in such a manner as a spring load caused by a spring 2, a hydraulic pressure caused by a hydraulic pressure oil flowed through the oil port 6, and a hydraulic pressure applied to the land 12 are made balanced. |
