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. 21, 1980
Filed:
Nov. 02, 1978
Applicant:
Inventor:
Ingemar P Persson, Nora, SE;
Assignee:
Nitro Nobel AB, Gyttorp, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228107 ; 228-25 ; 228 50 ; 2942 / ;
Abstract
A method of joining an inner metal pipe with a surrounding outer metal pipe comprising placing inside the inner pipe a contact body which prevents change of the inside diameter of the inner pipe and detonating an explosive around the outer pipe so that the inner surface of the outer pipe is metallurgically joined to the outer surface of the inner pipe. The contact body is a rigid body made of salt and the contact body is removed after the pipes are joined by dissolving the contact body in a fluid in which the salt is soluable.