发明名称 |
HERSTELLUNG VON GEWINDEBOHRUNGEN |
摘要 |
<p>PCT No. PCT/GB94/00544 Sec. 371 Date Oct. 30, 1995 Sec. 102(e) Date Oct. 30, 1995 PCT Filed Mar. 17, 1994 PCT Pub. No. WO94/21409 PCT Pub. Date Sep. 29, 1994A threaded hole may be formed in a lid of an underground petrol tank without emptying the tank or removing the lid, using a tool (FIG. 3) having a taper tap section (61), an intermediate tap section (62) and a final tap section (63). At the leading end of the tool, there is a reamer section (60) and supported on the free end of the tool is a centerless hole cutter (50). A resilient mounting transmits drive from the main part of the tool to the cutter (50), but allows the cutter to float. A sleeve (23) surrounds the tool, so that a column of inert gas may be caused to lie in the cutting region. A magnet (57) mounted within the cutter (50) catches and holds a released disk of the cover. Also described is a rig (FIG. 1), for operating the tool (FIG. 3), and a method (FIG. 5) of securing a collar threaded into a hole formed by the tool.</p> |
申请公布号 |
DE69407172(T2) |
申请公布日期 |
1998.07.16 |
申请号 |
DE1994607172T |
申请日期 |
1994.03.17 |
申请人 |
WHEATLEY, DAVINA, BRENTWOOD, ESSEX, GB |
发明人 |
WHEATLEY, DOUGLAS JOHN HUDSON HILL,, BRAINTREE, ESSEX CM7 4EH, GB |
分类号 |
B23B41/08;B23B51/04;B23D77/00;B23G5/06;B23Q11/08;(IPC1-7):B23B51/04;B23G5/20 |
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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