发明授权
- 专利标题： Method of making bellows pipe
- 专利标题（中）： 制造波纹管的方法
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申请号： US639123申请日： 1991-01-09
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公开(公告)号： US5074138A公开(公告)日： 1991-12-24
- 发明人: Robert F. Miller
- 申请人： Robert F. Miller
- 专利权人： Miller Robert F
- 当前专利权人： Miller Robert F
- 主分类号： B21D13/04
- IPC分类号： B21D13/04 ; B21C37/12 ; B21D15/00 ; F16L9/16 ; F16L11/11 ; F16L11/16
摘要：
A bellows pipe construction and method for manufacturing are disclosed wherein helically wound coils of logitudinally corrugated strip are joined with an interlocking seam. Thereafter, the interlocking seam is deformed to position the edges of the strip in substantial parallelism with the axis of the pipe. The resulting pipe can be extended or shortened for installation and will further adjust and accommodate ground movement without substantial loss of strength.
公开/授权文献
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