Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2008-08-04
2010-11-30
Hong, John C (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C074S492000
Reexamination Certificate
active
07841063
ABSTRACT:
In a method for the production of a corrugated tube from a flat metal sheet, two half shells are formed each extending in a longitudinal direction, and the half shells are provided with corrugations oriented transversely to their longitudinal direction. The two half shells are either disposed in a single sheet metal part longitudinally next to one another or are separate parts. In the case of their formation with two half shells disposed in a common sheet metal part next to one another, the preformed sheet metal part in the region between the two half shells is folded or curved about an axis parallel to the longitudinal directions of the half shells, wherein free longitudinal edges of the half shells are brought into mutual contact and are connected with one another. In the case of the formation of the half shells in the form of separate parts, the two half shells are placed against one another with their longitudinal edges and the longitudinal edges are connected with one another. At least one of the two longitudinal edges, coming into mutual contact, of the subshells is provided with a row of cutouts spaced apart from one another in the longitudinal direction of the subshells. Through the connection of sections of this longitudinal edge, located between the cutouts, together with the other longitudinal edge in the connection region of the two longitudinal edges, a row of openings through the casing of the corrugated tube is formed, which openings are spaced apart in the longitudinal direction of the corrugated tube.
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International Search Report issued in the International (PCT) Application of which the present application is the U.S. National Stage.
Hong John C
Thyssenkrupp Presta Aktiengesellschaft
Wenderoth , Lind & Ponack, L.L.P.
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