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:
Aug. 14, 1990
Filed:
Oct. 17, 1988
Alain Vignes, Paris, FR;
Framatome, Courbevoie, FR;
Abstract
A connecting surface (24) of frusto-conical shape whose axis coincides with the axis of a pipe (23), having an apex semi-angle close to 45.degree. and a section of transverse dimension decreasing towards the end of the pipe (23) is produced on an end part of the pipe (23). A connecting surface (25) of frusto-conical shape corresponding to the shape of the connecting surface (24) of the pipe is produced on the wall member (20). The connecting surfaces (24, 25) are placed so that they coincide, and the pipe and the wall member are welded by means of an electron beam in a single pass and without filler metal, along their connecting surfaces (24, 25) from the side of the wall (20) onto which the widened part of the connecting surface (25) of the opening (22) opens. The invention applies particularly to the fastening of pipes (23) to a pipe-carrying shell (20) of a pressurized-water nuclear reactor vessel.