Variable pitch mounting for airfoil blades of a windmill or prop

Details Variable pitch mounting for airfoil blades of a windmill or prop Variable pitch mounting for airfoil blades of a windmill or prop

1975-05-22

1977-06-14

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Responsive to relative working fluid velocity

416136, 416139, 416202, 416225, F03D 704

Patent

active

040294340

ABSTRACT:
A blade mounting having journal and thrust bearings locating the blades in a hub to relieve load and therefore friction by a torsionally flexible tension member secured within each blade so that centrifugal forces of the blade are transmitted directly to the hub, instead of thru the thrust bearing. Also, each blade is located in the hub so that the aerodynamic torque and thrust on the blade are transmitted directly to the hub as components of the centrifugal force.

REFERENCES:
patent: 1407271 (1922-02-01), Harkins
patent: 1943210 (1934-01-01), De Lavaud
patent: 2023684 (1935-12-01), Hubbell
patent: 2043136 (1936-06-01), Weible
patent: 2047776 (1936-07-01), Hafner
patent: 2054383 (1936-09-01), Ludewig
patent: 2074871 (1937-03-01), Symons
patent: 2253013 (1941-08-01), Birch
patent: 2483913 (1949-10-01), Lampton
patent: 2557220 (1951-06-01), Gazda
patent: 2660252 (1953-11-01), Doussain et al.
patent: 3637321 (1972-01-01), Nekrasov et al.

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