发明名称 |
Apparatus for visually checking the operational status of a stop valve, and a manual opening apparatus for a normally-closed valve |
摘要 |
An apparatus for manually opening a normally-closed valve includes a value and a hand-operated valve opening jig. The valve includes a working rod for operating a valve element which is moved to close and open a conduit; a cylindrical holder fixed to the working rod, and to which the hand-operated valve opening jig can be detachably attached from the outside of the housing; a biasing member which biases the working rod to close the conduit; and a pressure chamber which is supplied with a working fluid to move the working rod to make the valve element open the conduit. The hand-operated valve opening jig includes a manual-opening attachment which can be detachably attached to the cylindrical holder; and an operational member which is operated to move the working rod in a direction to make the valve element open the conduit via said manual-opening attachment.
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申请公布号 |
US2001025657(A1) |
申请公布日期 |
2001.10.04 |
申请号 |
US20010815735 |
申请日期 |
2001.03.23 |
申请人 |
EJIRI TAKASHI |
发明人 |
EJIRI TAKASHI |
分类号 |
F16K37/00;F16K7/14;F16K31/363;F16K31/524;(IPC1-7):F16K37/00 |
主分类号 |
F16K37/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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