Method and apparatus for forming intruded branch attachment structures in tubing
US4679289A · kind A · utility
7Cited by
8References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Aug 15, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/40
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for forming intruded sleeves in extrudable metal tubing thereby to receive branch tubes which are brazed in place. The apparatus comprises a split mandrel and a punch which drives a punch head through the tube wall section and into a pocket in the upper section of the mandrel to form the intruded sleeve structure. Removal of the mandrel is accomplished by removing a lower section, dropping the upper section off of the intruded sleeves, and thereafter removing the upper section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.