Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Plural articulation
Patent
1976-12-15
1978-06-06
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Plural articulation
416134A, B64C 2738
Patent
active
040934004
ABSTRACT:
A helicopter rotor having flexible blades mounted to a drive shaft by means of hub arms, wherein opposing blade members are interconnected by a common spar passing across the rotor axis. The spar members are supported from the hub arms by spherical bearing members. The universal freedom of these bearing members provides torsional freedom for blade pitching motions without restricting blade flapping or in-plane bending.
REFERENCES:
patent: 2830669 (1958-04-01), Klockner
patent: 2949967 (1960-08-01), Jovanovich
patent: 3193019 (1965-07-01), Drees et al.
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.
Hauschild Vernon F.
Powell Jr. Everette A.
United Technologies Corporation
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