Fluid reaction surfaces (i.e. – impellers) – With means positioning fluid current driven impeller... – Feathering cycle related to flow direction
Patent
1979-08-02
1981-09-01
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
With means positioning fluid current driven impeller...
Feathering cycle related to flow direction
416 24, F03D 306
Patent
active
042869226
ABSTRACT:
A device converting the kinetic energy belonging to the moving stream of fluid such as the wind, river stream and gulf stream is disclosed. Said device is comprised of two or more blades revolving about the central axis, which blades are mechanically linked to said central axis wherein each of said blades completes a half rotation about its own axis when it completes a complete revolution about said central axis. Each of blades further includes a pair of flaps rotatably disposed on each edge of said blade, which flaps are mechanically linked to the rotating and revolving motion of the blade wherein said flaps are automatically deflected to provide a suitable camber to the blades to generate a lift force on the blade. In said arrangement, the blade and flaps line up automatically with the fluid stream direction when it occupies the minimum drag position in revolving about said central axis, while the blade takes up automatically a position perpendicular to the wind direction when it occupies the maximum drag position which is the diametrically opposite position to said minimum drag position wherein a hyprothetical line connecting said two positions are generally perpendicular to the fluid stream direction.
REFERENCES:
patent: 1430406 (1922-09-01), Schulthes et al.
patent: 1953444 (1934-04-01), Stalker
patent: 2622686 (1952-12-01), Chevreau et al.
patent: 3295827 (1967-01-01), Chapman et al.
patent: 4137009 (1979-01-01), Telford
patent: 4178126 (1979-12-01), Weed
patent: 4247251 (1981-01-01), Wuenscher
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