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:
Sep. 21, 1976
Filed:
Sep. 22, 1975
Applicant:
Inventors:
Johann T Hess, Deerfield, IL (US);
Frederick C Kucklick, Buffalo Grove, IL (US);
Assignee:
Grotnes Machine Works, Inc., Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ; B21D / ;
U.S. Cl.
CPC ...
72370 ; 72393 ; 269 481 ;
Abstract
A method and apparatus for mechanically expanding pipe of the type having a helical weld seam which includes a radially expandable die head assembly for incrementally expanding the pipe advanced over the die head and wherein the die head has a helical groove which corresponds to the helical weld seam of the pipe. Means are provided for advancing the pipe longitudinally over the die head assembly for incremental expansion and preferably for substantially simultaneously rotating the pipe to maintain the conformity between the die head groove and the helical weld seam of the pipe.