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US6339945B2
|
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Apparatus for forming tapered spiral tubes
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US5131693A
|
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Pipe coupling method
|
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US4791800A
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Roll forming process and apparatus for making ribs in strip material
|
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US4756217A
|
|
Travelling pipe cut-off
|
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US4763830A
|
|
Method for welding ribbed pipe
|
|
US4630650A
|
|
Spiral ribbed pipe
|
|
US4318320A
|
|
Method for removing camber from strip
|
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US4255999A
|
|
Method and apparatus for removing camber from strip
|
|
ES445908A3
|
|
A method for forming a tube with double-wall helicoidal sewing. (Machine-translation by Google Translate, not legally binding)
|
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US4018072A
|
|
End recorrugator
|
|
US3916449A
|
|
Implantable heart pump
|
|
ZA7403448B
|
|
Heart pump
|
|
GB1447394A
|
|
Heart pump
|
|
US3857159A
|
|
Pipe forming method
|
|
AU3138971A
|
|
Helical pipe forming and welding apparatus and method
|
|
DE2135502A1
|
|
Helical pipe forming and butt-welding
|
|
US3747446A
|
|
Pipe tracking apparatus and method
|
|
US3664170A
|
|
Curving method and apparatus for ridged sheet material
|
|
US3650015A
|
|
Helical pipe making method
|
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US3572394A
|
|
Lock seam for helical corrugated pipe
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