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US 7,118,341 B2Granted
Self adjusting sail vertical shaft windmill
OwnerDelbert Lee Hartmaninventor
Life of this patent
Estimating the term…
Abstract
A vertical shaft is provided and supported whereupon are mounted sails that can so self adjust as to interact with the wind in such a way as to power a windmill as well as relieve themselves from winds that are too severe while maintaining continuous operation.
Claims6
A vertical shaft windmill comprising:
- at least one pair of sails;
- wherein each sail is provided with a positioning bar set at a right angle to the downwind sides of the sail;
- wherein a rocker arm joins each pair of sails;
- wherein each positioning bar is coupled to the rocker arm by at least one spring.
1 more element
Dependencies are inferred from the claim text.