| 摘要 |
PURPOSE:To enable a form of flowing maintainable in the same state despite selection of the flow direction, by interconnecting two pressure ports at the axial one end side by means of a space between land parts adjoined with each other at a time when a spool moves to one side. CONSTITUTION:Four sets of pressure ports 60a-60d are formed in a sleeve 2 inside a housing 1, while annular interconnecting grooves 61a-61d are formed in the housing 1 in corresponding to these pressure ports. On the other hand, three land parts 63a-63c are formed in a spool 3 being slidably inserted into the inside of the sleeve 2. And, when the spool 3 is moved to the left, these pressure ports 60a and 60b are made so as to be conducted via a space 64a between these land parts 63a and 63b. In addition, when the spool 3 is moved to the right, these remaining pressure ports 60c and 60d are made so as to be conducted via a space 64b formed between land parts 63b and 63c. The interconnecting groove 61d is interconnected to an oil passage 14b at the load side by a passage 62. |
