发明名称 |
Flexible ducting joints |
摘要 |
A joint is made between the ends of two similar lengths of flexible ducting. One end has a single ring and the other a pair of parallel rings. The single ring fits between the pair of rings. Either the single ring or the extreme ring of the pair of rings is of a larger diameter than the diameter of the ducting. The end of the ducting length with the larger ring is fitted inside the other ducting length.
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申请公布号 |
US4037862(A) |
申请公布日期 |
1977.07.26 |
申请号 |
US19750621373 |
申请日期 |
1975.10.10 |
申请人 |
COAL INDUSTRY (PATENTS) LIMITED |
发明人 |
THORP, PETER;BYCROFT, GEORGE WILLIAM |
分类号 |
E21F1/06;(IPC1-7):F16L31/00 |
主分类号 |
E21F1/06 |
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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