Self-tightening fitting for attachment of metal to carbon-carbon structures
US5228795A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1989 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Dec 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/75
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An attachment fitting for securing metal structures to carbon-carbon structures which tightens as temperature increases. The fitting is particularly useful in high temperature aerospace applications such as hypersonic aircraft. The fitting basically connects an upstanding carbon-carbon blade on a carbon-carbon structure to a metal clevis which fits snugly thereover. A ceramic bushing is fitted in a transverse hole in the blade. A transverse bolt hole extends through the clevis and bushing. A bolt in the bolt hole is tightened with one or more nuts to tightly press the clevis against the busing and blade. The bolt and nut material is selected to have a lower coefficient of thermal expansion than the clevis so that differential thermal expansion between clevis and bolt keeps the joint tight at elevated temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.