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. 22, 1985
Filed:
Mar. 02, 1984
Applicant:
Inventor:
Owen Hayden, Bolton, GB;
Assignee:
National Nuclear Corporation Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P / ; B23P / ;
U.S. Cl.
CPC ...
2940209 ; 2940216 ; 2915 / ; 291574 ; 165 76 ; 165 83 ;
Abstract
A method of repairing a defective tube in a tube-in-shell heat exchanger which entails inserting within the defective tube a tubular sleeve and sealingly bonding the end regions of the sleeve to the tube to bridge the defect, the tubular sleeve having axial flexibility (for example by being circumferentially corrugated). The sleeve may be mechanically keyed to the tube at positions adjacent to the bonding at the end regions of the sleeve.