The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1987
Filed:
Apr. 29, 1986
Applicant:
Inventors:
Assignee:
Vaw Leichtmetall G.m.b.H., , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
29523 ; 138173 ; 182228 ; 2853824 ;
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.