Non-metallic hydraulic expansion mandrel
US6536252B1 · kind B1 · utility
5Cited by
23References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2002 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Feb 19, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49805
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A hydraulic expansion mandrel for expanding tubes in a heat exchanger tube bundle into a tubesheet is formed from a non-metallic material, such a carbon fiber-reinforced material. The mandrel includes an elongated cylinder having a tip, a fluid supply end and a reduced diameter section. A pair of O-rings separates the reduced diameter section from the tip and fluid supply end of the elongated cylinder. An adjustment shim, located between a threaded collar and a locking stop collar, adjusts the length of the mandrel inserted into a tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.