发明名称 |
Thawing bell and two hundred and twenty volt heating coil combination for unfreezing e.g. frozen manhole covering lying in ex-hazardous area, has bell and coil including diameters adapted to size and shape of valve, cap and covering |
摘要 |
<p>The combination has a thermostat adjustment knob for heat regulation formed at a handle. A thawing bell (1) is formed from steel or stainless steel in a semi-circular, angular or rectangular shape. A two hundred and twenty volt heating coil (2) is provided in the bell. Diameters of the bell and the coil are adapted to size and circular, angular or rectangular shape of a valve, a hydrant cap and a manhole covering according to DN 600-800standard. The knob is used for adjusting temperature and for beginning unfreezing process.</p> |
申请公布号 |
DE102009017142(A1) |
申请公布日期 |
2010.10.21 |
申请号 |
DE20091017142 |
申请日期 |
2009.04.15 |
申请人 |
FIEDLER, JOSEF |
发明人 |
FIEDLER, JOSEF |
分类号 |
E03F5/02;E02D29/14;E03B9/10 |
主分类号 |
E03F5/02 |
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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