Prepared joint for a tube fitting
US4076287A · kind A · utility
110Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1976 |
| Grant date | Feb 28, 1978 |
| Priority date | — |
| Expiry date | Nov 8, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L23/032
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved prepared joint is provided on a fitting for mechanically joining it to the end of a metal tube. The fitting has a grooved bore and a bore extending end portion for projecting the bore a predetermined distance beyond its grooved portion so that during radial expansion of the tube into the grooved portion the entire expanded length of the tube is fully supported within the fitting. Such support is effective in extending the useful life of the tube assembly formed by the fitting and tube by alleviating metal fatigue failures due to vibrational bending stresses in the expanded portion of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.