发明名称 |
Pipe fitting for drilling |
摘要 |
A pipe tapping valve which can be connected, for example by welding, with a pipe which is to be tapped, and which includes a support stub (4) in which a drill bit (26) is disposed for axial movement, and with which a branch nipple (12) is connected. The pipe tapping valve is configured so that the drilling of the tube can be safely performed with little difficulty, while a seal satisfying the requirements of the particular application is provided both during the drilling and after the drilling has ended. The support stub (4) has a substantially smooth cylindrical inside surface; the drill bit (26) contains at its upper free end an expansion (30) or a sealing ring (54) in contact with the inner surface (34) of the support stub (4), and the drill bit (26) is axially movable by means of a drilling tool (36) attachable to the support stub (4).
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申请公布号 |
US5975117(A) |
申请公布日期 |
1999.11.02 |
申请号 |
US19970979941 |
申请日期 |
1997.11.26 |
申请人 |
FRIATEC AKTIENGESELLSCHAFT |
发明人 |
SCHWEITZER, RUEDIGER;SICHLER, WOLFGANG;KRETZ, STEFFEN |
分类号 |
B23B41/08;F16L47/34;(IPC1-7):F16K43/00;F16L41/06 |
主分类号 |
B23B41/08 |
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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