Title:
BLADE AND WING CONFIGURATION
Document Type and Number:
WIPO Patent Application WO2005081701
Kind Code:
A3
Abstract:
A blade or wing configuration has a leading edge (2) and a trailing edge (3), and an upper surface (5) and a lower surface (6) extending from the leading edge (2) to the trailing edge (3). At least one of the upper surface (5) and the lower surface (6) is formed with a curved segment and a straight segment. The curved segment starts from a starting point on the upper surface or the lower surface between the leading edge and the trailing edge and ends at the leading edge. The straight segment extends from the starting point to the trailing edge. A tangent (10) at the leading edge (2) is substantially parallel to the direction of movement (4) and the straight segment forms an angle ? of approximately 30°-60° with respect to the direction of movement. The trailing edge can be formed with teeth (3).
Inventors:
VANMMOOR ARTHUR (US)
Application Number:
PCT/US2004/034532
Publication Date:
January 05, 2006
Filing Date:
October 20, 2004
Export Citation:
Assignee:
VANMMOOR ARTHUR (US)
International Classes:
B63H1/26; B64C3/10; B64C11/18; (IPC1-7): F04D29/38
Foreign References:
| US2899128A | 1959-08-11 | |||
| US4431376A | 1984-02-14 | |||
| US2682925A | 1954-07-06 |
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