Title: Beryllium reinforced composite solid and hollow shafting

Abstract: A solid or hollow shaft has an aluminum or titanium matrix reinforced with rcuate-shaped beryllium ribbons arranged around a central rod or core to form a circular cross-sectional configuration. The shaft has a high degree of torsional stiffness which enables it to be used on advanced aircraft or high-speed rotating machinery without mid-support bearings. The shaft may be formed by cladding the beryllium rods in aluminum or titanium and arranging them around the central rod or core to form a preform with a circular cross-sectional configuration. The preform is then subjected to hydrostatic pressure, causing the beryllium rods to deform into arcuate-shaped ribbons. The core may then be retained or leached out to provide a hollow shaft.

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Inventors: Schmidt, Richard (Mclean, VA, US)

Application Number: 452156
Filing Date: 1974-03-18
Publication_date: 1976-02-17
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 138/143 138/153, 138/174, 428/593, 428/614, 428/649
Other Classes:
US Patent Ref:

1125161	Jan, 1915	Page	29/191.
1280909	Oct, 1918	Wales et al.	29/191.
1292659	Jan, 1919	Speed	29/191.
1628759	May, 1927	Worrall	29/191.
3419952	Jan, 1969	Carlson	29/471.
3609855	Oct, 1971	Schmidt	29/191.

Other Refs:
Primary Examiner: Curtis, Allen B.
Assistant Examiner:
Attorney: Sciascia; R. S., Beers; R. F., Schneider; P.