Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2011-03-22
2011-03-22
Omgba, Essama (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S437000, C029S890149, C029S243500, C029S511000, C072S107000, C072S110000, C285S181000, C285S382000, C138S155000, C138S168000
Reexamination Certificate
active
07908731
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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Ladas & Parry LLP
Omgba Essama
Spiro S.A.
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