Sleeving method
US4581801A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1983 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Dec 9, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The sleeving method comprises inserting a metal sleeve within a tube so as to bridge the defective region of the tube. The sleeve is constructed to have annular slots on the outside thereof that are capable of tightly contacting the inside surface of the defective tube and creating a labyrinth-type seal therebetween. The sleeve is also constructed to have an expander member captured therein that may be pulled through the sleeve thereby causing expansion of those portions of the sleeve having the annular slots therein. Once such a sleeve has been inserted into the defective tube, the sleeve is internally expanded in the area of the sleeve wherein the annular slots are located by pulling the expander member through the sleeve. The expansion of the sleeve in the area wherein the annular slots are located causes the lands between each annular slot to closely contact the inside surface of the tube. The other end of the sleeve can then be either similarly attached to the tube or otherwise attached to the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.