| 发明名称 |
MECHANISM FOR PREVENTING THE STICKING OF SPOOL VALVES |
| 摘要 |
This invention is to make many annular grooves with a very narrow land width on the outer peripheral surface of the land of spool or on the inner peripheral surface of the spool hole of a valve body.
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| 申请公布号 |
US3812883(A) |
申请公布日期 |
1974.05.28 |
| 申请号 |
US19720241469 |
申请日期 |
1972.04.05 |
| 申请人 |
SUMITOMO PRECISION PROD CO LTD,JA |
发明人 |
YOKOKAWA T,JA |
| 分类号 |
F16K11/07;(IPC1-7):F16K11/07 |
主分类号 |
F16K11/07 |
| 代理机构 |
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