Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Plural articulation
Patent
1975-08-25
1977-05-03
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Plural articulation
416138, B64C 2738
Patent
active
040211410
ABSTRACT:
This invention relates to a semi-rigid rotor of the type in which each rotor blade is attached to a hub through a flexure member comprising an inner part which accommodates flapping movements and an outer part which accommodates lead/lag movements. In the arrangement of the present invention the outer part of each flexure member comprises a spindle extending from the inner part and an arm extending from a housing rotationally mounted on the spindle, the arm extending outwardly to an outer end arranged for connection to a rotor blade and spaced-apart radially from an outer end of the spindle. A tie-bar interconnects the outer end of the arm and the spindle, and means are provided to rotate the housing to effect pitch changes of the rotor blade during operation.
REFERENCES:
patent: 2121345 (1938-06-01), Hafner
patent: 3026942 (1962-03-01), Cresap
patent: 3280918 (1966-10-01), Drees et al.
patent: 3501250 (1970-03-01), Mosinskis
patent: 3762834 (1973-10-01), Bourquardez et al.
patent: 3885887 (1975-05-01), Desjardins
patent: 3926536 (1975-12-01), Ciastula et al.
patent: 3941503 (1976-03-01), Bruel
Powell Jr. Everette A.
Westland Aircraft Limited
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