Joints and connections – Utilizing thermal characteristic – e.g. – expansion or... – Interposed material of intermediate coefficient of expansion
Patent
1987-06-26
1989-07-25
Kundrat, Andrew V.
Joints and connections
Utilizing thermal characteristic, e.g., expansion or...
Interposed material of intermediate coefficient of expansion
4034081, 403 28, F16C 900
Patent
active
048507326
ABSTRACT:
A fastener for connecting structures having significantly different coefficients of thermal expansion which substantially eliminates thermal stress with varying ambient temperatures, while allowing said structures to be offset 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 said first structure around the narrow end of said bore, the shoulder having a frusto-conical outer edge. A flange member is secured to the vertex end of said fastener, said flange member having a surface configured to engage said outer edge in a coincident relationship. The fastener is tightened to bring both pairs of coincident conical surfaces into pressure contact. Both pairs of conic surface preferably have a common vertex which lies outside the fastener. Where thermal protection requires, the bore may be formed in a bushing of a material having low thermal conductivity but similar thermal expansion characteristics.
REFERENCES:
patent: 3107950 (1963-10-01), Kleven
patent: 3172689 (1965-03-01), Glaser
patent: 4299018 (1981-11-01), Bikerstaff et al.
patent: 4512699 (1985-04-01), Jackson et al.
Duncan John R.
General Dynamics Corp./Space Systems Division X
Gilliam Frank D.
Kundrat Andrew V.
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