| 发明名称 |
A flapper valve having a flapper pivotable more than 90 degrees |
| 摘要 |
<p>A flapper valve assembly for a fluid conduit includes a flapper 30 which is pivotable through more than 90 degrees. The flapper may pivot more than 180 degrees. The flapper may form a bi-directional seal on a valve seat. Also claimed is bi-directional flapper valve.</p> |
| 申请公布号 |
GB2476000(A) |
申请公布日期 |
2011.06.08 |
| 申请号 |
GB20110003207 |
申请日期 |
2007.04.26 |
| 申请人 |
PETROWELL LIMITED |
发明人 |
DANIEL PURKIS |
| 分类号 |
E21B34/12;E21B34/00;E21B34/10 |
主分类号 |
E21B34/12 |
| 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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