Joints and connections – Utilizing thermal characteristic – e.g. – expansion or... – Members having different coefficients of expansion
Patent
1988-10-11
1990-06-19
Kundrat, Andrew V.
Joints and connections
Utilizing thermal characteristic, e.g., expansion or...
Members having different coefficients of expansion
4034081, 403 28, F16C 900
Patent
active
049348574
ABSTRACT:
A fastener for connecting structures having significantly different coefficients of thermal expansion (CTE) which substantially eliminates thermal stress with varying ambient temperatures, while allowing said structures to be either abutting or spaced from each other. A frusto-conical bore through a wall of a first structure receives a frusto-conical surface of an elongated fastener which is coincident with said bore. The fastener has a base secured to a second structure. A shoulder is formed on the first structure around the narrow end of the bore, the shoulder having a frusto-conical outer edge. A flange member is secured to the vertex end of said fastener, the flange member having a surface configured to engage the outer edge in a coincident relationship. The fastener is tightened to bring both pairs of coincident conical surfaces into pressure contact. Both parts of conic surface preferably have a common vertex which lies outside the fastener. The fastening system is particularly useful in cases where low-CTE plates or other contiguous structures are to be fastened together by a high-CTE fastener.
REFERENCES:
patent: 3107950 (1963-10-01), Kleven
patent: 3172689 (1965-03-01), Glaser
patent: 4299018 (1981-11-01), Bickerstaff et al.
patent: 4512699 (1985-04-01), Jackson et al.
patent: 4668116 (1987-05-01), Ito
Duncan John R.
General Dynamics Corporation Convair Division
Kundrat Andrew V.
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