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:
Apr. 26, 1977
Filed:
Jun. 09, 1975
Applicant:
Inventors:
Daniel Hoffmann, Bourg-en-Bresse, FR;
Remi Reynard, Bordeaux, FR;
Assignees:
Societe des Hauts Fourneaux de la Chiers, Longwy-Bas, FR;
Coflexip, Rueil-Malmaison, FR;
Institut Francaise du Petrole, des Carburants et Lubrifiants et, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ; F16L / ;
U.S. Cl.
CPC ...
138118 ; 138122 ; 138129 ; 138130 ; 138134 ;
Abstract
A hollow flexible tubular body which comprises at least one tubular layer. The layer is formed by adjacent helical windings having hooked edges and substantially flat sections. The turns of the helix do not show any spontaneous tendency to increase in diameter.