Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Sectional – staged or nonrigid working member
Reexamination Certificate
2009-04-17
2011-10-18
Chaudhari, Chandra (Department: 2891)
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Sectional, staged or nonrigid working member
Reexamination Certificate
active
08038400
ABSTRACT:
A high-efficiency windmill includes an inner rotor having propellers for capturing wind blowing along a wind direction to push the inner rotor about an axis, and an outer rotor rotatable about the same axis independently of the inner rotor radially exteriorly of the inner rotor. The outer rotor is self-positionable in a rotor position about the axis in response to the wind direction. The outer rotor has an airfoil-shaped vane having a forward surface generally facing the wind in the rotor position, and a rear surface generally facing away from the wind in the rotor position. The rear surface creates a negative pressure zone by accelerating the wind across the rear surface. At least one of the propellers adjacent the airfoil-shaped vane in the rotor position is pulled by the negative pressure zone to assist the wind in pushing the propellers about the axis.
REFERENCES:
patent: 4681512 (1987-07-01), Barnard
patent: 6688842 (2004-02-01), Boatner
patent: 7040858 (2006-05-01), Suzuki
patent: 2007/0189889 (2007-08-01), Yokoi
Chaudhari Chandra
Kirschstein et al.
LandOfFree
High-efficiency windmill does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-efficiency windmill, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-efficiency windmill will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4273496