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. 04, 2001
Filed:
Nov. 17, 1999
Applicant:
Inventor:
François Dupoiron, Barentin, FR;
Assignee:
Coflexip, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C 3/712 ;
U.S. Cl.
CPC ...
B21C 3/712 ;
Abstract
Method of manufacturing a metal carcass for flexible pipe or umbilical comprising shaping a band of metal strip and then helically winding it to form the metal carcass which, in cardioid mode, has a given collapse strength, wherein the metal strip is work-hardened prior to shaping to give it at least a 15% higher elongation at rupture, and in that the said metal carcass which is made from the said work-hardened metal strip has, in cardioid mode, a collapse strength which is at least 15% higher than the given collapse strength.