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US 2012/0257974 A1Published application
Wind Turbine
OwnerPeter Mokinventor
Life of this patent
Estimating the term…
Abstract
A wind turbine includes two sets of blades. A first set of blades is placed at a front location of the wind turbine. A second set of blades is placed behind the first set of blades. The first set of blades turns in an area within a first circumference. The second set of blades are mounted at a location sufficiently away from an axis of rotation of the wind turbine so that the second set of blades turns within an area that is within a second circumference and that is substantially outside the first circumference.
Claims20
A wind turbine, comprising:
- a first set of blades at a front location of the wind turbine;
- and,
- a second set of blades behind the first set of blades;
- wherein the first set of blades turns within an area within a first circumference;
- and,
- wherein the second set of blades are mounted at a location sufficiently away from an axis of rotation of the wind turbine so that the second set of blades turns within an area that is within a second circumference and that is substantially outside the first circumference.
3 more elements
A method for protecting a wind turbine against effects of strong wind comprising:
- placing a first set of blades at a front location of the wind turbine so the first set of blades turns within an area within a first circumference;
- placing a second set of blades behind the first set of blades, the second set of blades being mounted at a radial location sufficiently away from an axis of rotation of the wind turbine so that the second set of blades turns within an area that is within a second circumference and that is substantially outside the first circumference;
- and,
- folding the second set of blades down toward a back of the wind turbine so that the second circumference decreases in response to increasing wind velocity.
1 more element
A wind turbine, comprising:
- a first set of blades at a front location of the wind turbine;
- and,
- a second set of blades behind the first set of blades;
- a folding mechanism that in response to increasing wind velocity allows the second set of blades to fold down toward a back of the wind turbine so that the second circumference decreases;
- and,
- a pitch changing mechanism that allows a pitch angle of the first set of blades to change to be more parallel to wind direction, the pitch changing mechanism including a spring that is compressed against a stop so that folding of the second set of blades toward the back of the wind turbine results in increasing compression force on the spring.
3 more elements
Dependencies are inferred from the claim text.