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US 2012/0070282 A1Published application
High torque vertical axis windmill
OwnerGhulam Murtaza Khan, SR., Ghulam Ahmad Khan, JR.inventors
Life of this patent
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Abstract
A high torque vertical axis windmill that has blades with curved parts secured together. The second part of each blade is movable to deploy the maximum surface of the blade to the wind for maximum torque during a portion of the cycle of the blades. The second part of each blade is movable to a second position to deploy the minimum surface of the blade to the wind for minimum drag during another portion of the cycle of the blades.
Claims20
A windmill comprising
- shaft means for supporting at least one blade,
- at least one blade,
- each of said at least one blade having a first portion and a second portion,
- said first portion and said second portion having a first end and a second end,
- means for securing said first end of said first portion to said shaft means,
- means for securing said first end of said second portion to said second end of said first portion,
- said second portion being movable, with respect to said first portion, from a first position to a second position, and
- when in said first position said second end of said second portion is remote from said shaft means, and
- when in said second position said second end of said second portion is adjacent said shaft means.
6 more elements
A high torque vertical axis windmill comprising at least one blade with a first part and a second part,
- means for making said second part of said at least one blade movable for deploying a maximum surface of said at least one blade to the wind for maximum torque during a portion of a cycle of said at least one blade,
- means for allowing said second part of said at least one blade to move to a second position to deploy the minimum surface of the blade to the wind for minimum drag during another portion of a cycle of said at least one blade.
Dependencies are inferred from the claim text.