Multi-wall cylindrical structure, method of making such structure, and apparatus for carrying out such method
US6955780B2 · kind B2 · utility
25Cited by
34References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 7, 2002 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Jan 27, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An elongated composite tube made up of an inner tube 42 and an outer tube 44 (see FIG. 3) with a plurality of elongated helical ribs disposed between the inner tube and the outer tube in a supporting relationship to both. A slinky like toy made from the composite tube is also disclosed, as is a method of making both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.