US4143992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wind operated power generator
Assignee: Individual
•
Filing: 1977-11-29
•
Granted: 1979-03-13
•
Expires: 1997-11-29
Abstract
Abstract A convergent intake duct has a radial outflow opening through which air accelerated in the duct impinges on airfoil shaped vanes to induce rotation of the rotor on which the vanes are mounted. The duct is formed internally of a tubular airfoil body so that the low pressure region formed on the trailing edge portion of the external airfoil surface increases the pressure differential across the vanes in the radial direction of outflow of the air from the duct.
Inventors
- 👤 Charles W. Crook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:32
CPC Classifications
F; F03; F03D; F03D1/00; F03D1/04; F05; F05B; F05B2250/00; F05B2250/50; F05B2250/501; F05B2250/5012; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y10; Y10S; Y10S415/00; Y10S415/905; Y10S415/908; Y10S416/00; Y10S416/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
In a wind turbine assembly from which power is taken having a rotor adapted to be mounted for rotation about an axis substantially parallel to the direction of airflow, a plurality of vanes carried on said rotor in radially spaced relation to said axis, flow controlling duct means mounted in operative relation to the rotor for conducting a radial outflow of air against said vanes to induce rotation of the rotor, and airfoil surface means mounted externally on the duct means for producing a low pressure region within which said vanes are positioned by the rotor to enhance rotation thereof in response to inflow of the air through the duct means.
Claim 2
Dependent Claim
111 words
In a wind turbine assembly from which power is taken having a rotor adapted to be mounted for rotation about an axis substantially parallel to the direction of airflow, a plurality of vanes carried on said rotor in radially spaced relation to said axis, flow controlling duct means mounted in operative relation to the rotor for conducting a radial outflow of air against said vanes to induce rotation of the rotor, and airfoil surface means mounted externally on the duct means for producing a low pressure region within which said vanes are positioned by the rotor to enhance rotation thereof in response to inflow of the air through the duct means.
Claim 3
Dependent Claim
51 words
The combination of claim 1 wherein said duct means includes an axial flow portion having an inlet end through which said inflow of air enters, and flow deflecting surface means spaced from the axial flow portion along the rotor axis for directionally changing the inflow of air into said radial outflow.
Claim 4
Dependent Claim
49 words
The combination of claim 2 wherein said airfoil surface means comprises an annular airfoil body enclosing said axial flow portion of the duct means and having a trailing edge adjacent to said vanes, the low pressure region being formed at said trailing edge so as to embrace the vanes.
Claim 5
Dependent Claim
26 words
The combination of claim 3 wherein said axial flow portion includes an internal tubular wall surface defining a converging axial flow passage along said rotor axis.
Claim 6
Dependent Claim
35 words
The combination of claim 4 wherein each of said vanes has an airfoil cup shape extending in an axial direction substantially between the trailing edge of the airfoil means and the flow deflecting surface means.
Claim 7
Dependent Claim
22 words
The combination of claim 5 wherein said flow deflecting surface means includes an end wall extending transversely of said axial flow passage.
Claim 8
Dependent Claim
46 words
The combination of claim 1 wherein said airfoil surface means comprises an annular airfoil body enclosing said axial flow portion of the duct means and having leading and trailing edges, the low pressure region being formed at said trailing edge so as to embrace the vanes.
Claim 9
Dependent Claim
15 words
The combination of claim 7 wherein each of said vanes has an airfoil cup shape.
Claim 10
Dependent Claim
35 words
The combination of claim 3 wherein each of said vanes has an airfoil cup shape extending in an axial direction substantially between the trailing edge of the airfoil means and the flow deflecting surface means.
Claim 11
Dependent Claim
26 words
The combination of claim 7 wherein said axial flow portion includes an internal tubular wall surface defining a converging axial flow passage along said rotor axis.
Claim 12
Dependent Claim
22 words
The combination of claim 2 wherein said flow deflecting surface means includes an end wall extending transversely of said axial flow passage.
Claim 13
Dependent Claim
24 words
The combination of claim 2 wherein said flow deflecting means includes a wall surface transverse to the axial flow portion having a convex curvature.
Claim 14
Dependent Claim
102 words
In a turbine assembly from which power is taken having a rotor adapted to be mounted for rotation about an axis substantially parallel to the direction of flow, a plurality of vanes carried on said rotor in radially spaced relation to said axis, an intake flow duct mounted in axially aligned relation to the rotor and having a radial outlet in axial alignment with said vanes, and an annular airfoil body carried by said flow duct having a leading edge portion and a trailing edge portion terminating at said radial outlet of the duct radially inwardly of and adjacent to the vanes.
Claim 15
Dependent Claim
102 words
In a turbine assembly from which power is taken having a rotor adapted to be mounted for rotation about an axis substantially parallel to the direction of flow, a plurality of vanes carried on said rotor in radially spaced relation to said axis, an intake flow duct mounted in axially aligned relation to the rotor and having a radial outlet in axial alignment with said vanes, and an annular airfoil body carried by said flow duct having a leading edge portion and a trailing edge portion terminating at said radial outlet of the duct radially inwardly of and adjacent to the vanes.
Claim 16
Dependent Claim
21 words
The combination of claim 13 wherein said vanes are provided with airfoil curvatures in a plane perpendicular to the rotor axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |