Apparatus for expanding tubular members
US4343170A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1981 |
| Grant date | Aug 10, 1982 |
| Priority date | — |
| Expiry date | Jan 22, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/5367
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for use in expanding tubes into holes in tubeplates including walls of drums and headers especially in boilers in which an annular body of elastomeric material is compressed axially and expands radially to force the tube into close engagement with the wall of the hole. The elastomeric material is supported at its ends by radially expansible supports each made up of pieces sliding on adjacent pieces, the sliding surfaces being forced together by the applied force, the pieces being located on reduced diameter end portions of the body. The invention enables applied pressures of the order of 70,000 psi (4830 bar) to be used to stress the tubeplate beyond its elastic limit without damage to the body caused by extrusion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.