Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Nonmetallic resilient mounting
Patent
1976-05-28
1977-09-13
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Nonmetallic resilient mounting
416141, 416214R, 416226, B64C 2748, B64C 2738
Patent
active
040478394
ABSTRACT:
A helicopter cross beam rotor is shown including upper and low coaxial composite blade spars at right angles secured by tension bolts which pass through the composite spars and are held by threaded nuts to a rotor hub at the upper end of a rotor drive shaft. A metal cap plate above the upper spar and a spar-to-spar filler piece are also provided. Torque between the spars and the rotor hub is reacted by intermeshing ribs and grooves on the confronting faces of the hub, the filler piece and the cap plate. The bolt holes in the composite spars are oversize so that the bolts do not react torque between the rotor hub and the composite spars.
REFERENCES:
patent: 3307634 (1967-03-01), Bihlmire
patent: 3384185 (1968-05-01), Fernandez
patent: 3409489 (1968-11-01), Renton
patent: 3669566 (1972-06-01), Bourquardez et al.
patent: 3743440 (1973-07-01), Moore
patent: 3762834 (1973-10-01), Bourquardez et a.
patent: 3874815 (1975-04-01), Baskin
patent: 3880551 (1975-04-01), Kisovec
patent: 3999887 (1976-12-01), McGuire
patent: 4008980 (1977-02-01), Noehren et al.
Ferris Donald Leroy
Noehren William Lawrence
Hauschild Vernon F.
Powell Jr. Everette A.
Tasker Maurice B.
United Technologies Corporation
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