Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Sectional – staged or nonrigid working member
Patent
1981-08-24
1984-07-31
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Sectional, staged or nonrigid working member
416134A, 416230, B64C 2738
Patent
active
044627556
ABSTRACT:
An aerodynamic rotor having a flexible blade comprising a plurality of planar layers and an anvil having configured bearing areas engagable with the flexed blade is presented. The plurality of layers are slidably movable in a shearing motion with respect to other layers. The blade is secured by the anvil with the configured bearing areas being engagable with an adjacent portion of the blade when the blade is flexed by forces created by the driven rotory motion of the anvil about an axis of rotation. Such a rotor with a laminated blade exhibits reduced head moment forces and reduced stress/strain forces within the blade thereby permitting improved reliability and maintenance.
REFERENCES:
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patent: 4051289 (1977-09-01), Adamson
patent: 4137007 (1979-01-01), Schonball
patent: 4255478 (1981-03-01), Crane
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Report No. SER 13429 of Sikorsky Aircraft Division of the United Technolos Corporation dated Aug. 28, 1980, and in particular pp. 83, 84, 86, 112 and Figures 51 and 52 of said report.
Hibyan Edward S.
Ogle Peter C.
Beers Robert E.
Powell Jr. Everette A.
The United States of America as represented by the Secretary of
Walden Kenneth E.
Wein Frederick A.
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