| 摘要 |
<p>An improved hydraulic valve (100) for a camera dolly (10) includes a valve p in (102) having an extension (106) within a valve housing to reduce vibration a nd noise and to reduce hydraulic closing forces. The valve pin (102) is resiliently supported by e.g., rubber o-rings at both ends. Valve performanc e is improved as reducing hydraulic forces on the valve pin (102) results in smooth valve operation, especially when opening the valve under heavy loadin g.</p> |
