Self-tightening fitting for attachment of metal to carbon-carbon

Details Self-tightening fitting for attachment of metal to carbon-carbon Self-tightening fitting for attachment of metal to carbon-carbon

1989-12-27

1993-07-20

Tudor, Harold J.

Joints and connections

Utilizing thermal characteristic, e.g., expansion or...

Members having different coefficients of expansion

403404, 4034081, 411546, F16B 100, F16C 900

Patent

active

052287955

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.

REFERENCES:
patent: 4512699 (1985-04-01), Jackson et al.
patent: 4834569 (1989-05-01), Foote et al.

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