Method of applying hollow section coupling to other sections
AssigneeVaw Leichtmetall GmbH
InventorsWerner Osterwald, Klaus-Georg Bottger, Rudolf Kader
Life of this patent
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Abstract
A hollow section for coupling to other sections and methods for the production and utilization thereof. Hollow sections are formed from strip or sheet material which are corrugated and then welded along a longitudinal seam. The thusly formed corrugated hollow sections are inserted into another section and flanged on or coupled thereto by smoothing or expanding the corrugations. The length of the corrugations is selected to be substantially equal to the circumference of the aperture into which the hollow section is coupled.
Claims10
A method for coupling a first hollow section having longitudinal corrugations to a second section having an aperture therein, comprising the steps of inserting said first hollow section having longitudinal corrugations into said aperture in said second section so that at least a portion thereof including said corrugations extends into and beyond said aperture, the first hollow section being selected so that its cross-sectional length exceeds the perimeter of the aperture;
- and expanding at least the portion of said first hollow section beyond said aperture so as to smooth said corrugations, while avoiding stretching the wall of said first hollow section whereby said hollow section exterior size exceeds the entire perimeter of said aperture and the cross-sectional length remains unchanged.
A method for coupling a hollow section having longitudinal corrugations to a second section having an aperture with a predetermined perimeter therein, comprising the steps of:
- selecting a hollow section having a cross-sectional length which exceeds the perimeter of said aperture, but the exterior size of at least a portion of which has been reduced sufficiently as a result of the introduction of said corrugations to permit it to be inserted into said aperture;
- inserting said portion of said hollow section into and beyond said aperture;
- and
- expanding at least a portion of said hollow section extending beyond said apeture so that its exterior size exceed the entire perimeter of said aperture, but its cross-sectional length remains unchanged.
Dependencies are inferred from the claim text.