Straight wing type wind and water turbine

Details Straight wing type wind and water turbine Straight wing type wind and water turbine

2005-12-13

2005-12-13

Verdier, Christopher (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Openwork

C416S22300B, C416S22300B, C416S228000, C416S242000, C416SDIG002

Reexamination Certificate

active

06974309

ABSTRACT:
A Straight blade type turbine has at least one two-dimensional blade positioned in parallel with and around a central axis of the turbine. The two-dimensional blade has a cross section with a blade chord turned around a center of the two-dimensional blade by an angle of 3° to −2° relative to a line perpendicular to another imaginary line connecting the central axis with the center of the two-dimensional blade. A distance between a fore end and the center of the cross section is 15 to 40 percent of a chord length of the blade. NC/R, which is calculated by a radius R extending from the axis to the center of two-dimensional blade, the chord length C, and the number N of the two-dimensional blades, is between 0.5 and 2.2. A maximum thickness of the two-dimensional blade is between 20 and 25 percent of the chord length. The turbine has a strut blade having a symmetric cross section joining the two-dimensional blade to a side of the central axis, the strut blade having a maximum thickness which is between 15 and 20 percent of a chord length of the strut blade.

REFERENCES:
patent: 4046489 (1977-09-01), Fairchild et al.
patent: 4264279 (1981-04-01), Dereng
patent: 4285636 (1981-08-01), Kato et al.
patent: 4435124 (1984-03-01), Zheng
patent: 6360534 (2002-03-01), Denniss
patent: 47-27845 (1972-07-01), None
patent: 56-42751 (1981-07-01), None
patent: 57-70962 (1982-01-01), None
patent: 2001-193629 (2001-07-01), None
Mitsuo Makino, “Koku Kogaku no Kiso,” Sangyo Tosho Kabushiki Kaisha, Jun. 25, 1984, pp. 95, 109.

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