Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Openwork
Reexamination Certificate
2011-06-14
2011-06-14
Nguyen, Ninh H (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Openwork
C415S229000, C415S907000
Reexamination Certificate
active
07959411
ABSTRACT:
A generally spherical turbine configured to rotate transversely within a cylindrical pipe under the power of fluid flowing either direction therethrough is operatively coupled with a rotating machine or generator to produce electricity. In one embodiment, the blades of the spherical turbine curve in an approximately 180 degree arc in a plane that is at an inclined angle relative to the rotational axis of a central shaft. In another embodiment, a deflector is provided upstream of the spherical turbine and within the cylindrical pipe to control flow through the spherical turbine by shielding a part thereof. The blades of the spherical turbine are airfoil in cross section to optimize hydrodynamic flow, to minimize cavitation, and to maximize conversion from axial to rotating energy.
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PCT Search Report and Written Opinion dated Oct. 26, 2010, PCT/US10/028378, In't filing date Mar. 24, 2010.
U.S. Appl. No. 12/661,566, filed Mar. 19, 2010, Office Action Mailed Oct. 12, 2010.
Cosby Mark Rydell
Kurth Edward
Palley Igor
Schlabach Roderic A.
Smith Greg
Bedi Harmohinder S.
EcoTech Law Group, P.C.
Lucid Energy Technologies, LLP
Nguyen Ninh H
Northwest Pipe Company
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