Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Reexamination Certificate
2006-10-17
2006-10-17
Omgba, Essama (Department: 3726)
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
C072S107000, C029S511000, C029S243580
Reexamination Certificate
active
07121129
ABSTRACT:
In ventilation and air-conditioning technology, so-called spiral pipes have to be joined together in a tightly sealed manner at widely differing angles, which is generally carried out by segment bends and pipe sections. An improved, durable seal of folded-seam connections is achieved by a flange-like double fold which is arranged at a first pipe end and which is surrounded on the outside at least in part with positive locking and with a continuous metal seal, by a second double fold at the second pipe end.
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Omgba Essama
Spiro SA
Weingarten Schurgin, Gagnebin & Lebovici LLP
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