Pin type carbon-carbon fastener

Details Pin type carbon-carbon fastener Pin type carbon-carbon fastener

1990-05-25

1991-06-11

Hunt, Brooks H.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Fluent pressure actuated

411 82, 411901, 10 1R, 295272, 295251, F16B 1304

Patent

active

050228030

ABSTRACT:
A method for joining carbon-carbon structural elements together using a carbon-carbon pin type fastener for transfer of shear loads. A coating of powdered metal which undergoes a large expansion when reacted in the presence of a gas is used to coat the outer surfaces of a pin which extends through the structural elements to be joined, with the powdered metal coating between the body of the pin and the surfaces of the structural elements through which the pin passes. After installation through the structural elements the pin is heated in an oxygen atmosphere causing the powdered metal coating to expand up to 100% from its unheated volume binding the pin to the structural elements. A fluted or scalloped edge on the pin increases the surface area of the pin increasing its friction holding force.

REFERENCES:
patent: 4687395 (1987-08-01), Berecz et al.
patent: 4687397 (1987-08-01), Berecz
patent: 4975006 (1990-12-01), Swanson

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