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US 8,616,815 B2Granted
Fastener
AssigneeROLLS-ROYCE plc
InventorsJoseph B Cooper, Paul R Hayton
Life of this patent
Estimating the term…
Abstract
A fastener (2) comprising an elongate core (4) and made of titanium or titanium alloy, and a sleeve (6) made of a different material and having an external thread (26), the core (4) being disposed within the sleeve (6) and fixed with respect to the sleeve (6).
Claims10
A fastener comprising:
- a core made of a first material and having a first end and a second end, wherein the core is provided with an engagement surface and a retaining shoulder which extends transversely of the length of the core and has a transverse dimension greater than that of the engagement surface;
- and
- a sleeve made of a second material and having an external thread, the core being disposed within the sleeve such that an inner surface of the sleeve engages the engagement surface and the retaining shoulder prevents the sleeve from being displaced in a lengthwise direction with respect to the core, the transverse dimension of the inner surface of the sleeve being expandable by heat to enable the sleeve to pass over the retaining shoulder.
Dependencies are inferred from the claim text.