Patent US4257736A successfully refreshed from Google Patents.
US4257736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Governed propeller type wind motor arrangement
Assignee: Individual
•
Filing: 1979-03-14
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Granted: 1981-03-24
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Expires: 1999-03-14
Abstract
Abstract A propeller type wind motor arrangement having a blade mounting hub, a plurality of air foil blades, and blade receiving means for mounting the blades to the hub for pivotal movement about a longitudinal axis of the blades is provided with a governor for retaining the blades at a first high torque, relatively low tip speed ratio forming angle during motor start-up and at rotational speeds below a minimum normal operational speed, and for abruptly shifting said blades to a second high efficiency, relatively high tip speed ratio forming angle when said operational value is reached.
Inventors
- 👤 Dennis Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:07
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/022; F03D7/0224; F05; F05B; F05B2260/00; F05B2260/70; F05B2260/74; F05B2260/75; F05B2260/77; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A propeller type wind motor arrangement comprising: (a) a blade mounting hub; (b) a plurality of air foil blades; (c) blade receiving means for mounting said blades to said hub for pivotal movement about a longitudinal axis of said blades; and (d) governor means for retaining said blades at a first high torque, relatively low tip speed ratio forming angle during motor start-up and at rotational speeds below a minimum normal operational speed, and for abruptly shifting said blades to a second high efficiency, relatively high tip speed ratio forming angle when said operational speed is reached.
Claim 2
Dependent Claim
97 words
A propeller type wind motor arrangement comprising: (a) a blade mounting hub; (b) a plurality of air foil blades; (c) blade receiving means for mounting said blades to said hub for pivotal movement about a longitudinal axis of said blades; and (d) governor means for retaining said blades at a first high torque, relatively low tip speed ratio forming angle during motor start-up and at rotational speeds below a minimum normal operational speed, and for abruptly shifting said blades to a second high efficiency, relatively high tip speed ratio forming angle when said operational speed is reached.
Claim 3
Dependent Claim
26 words
A wind motor arrangement according to claim 1, wherein said governor means includes means responsive to the speed of said blades for effecting angular changes thereof.
Claim 4
Dependent Claim
29 words
A wind motor arrangement according to claim 2, wherein said governor means includes spring means for retaining said blades in said first position until said minimum speed is reached.
Claim 5
Dependent Claim
88 words
A wind motor arrangement according to claim 2, wherein said mounting hub comprises first and second hub plates, and wherein said blade receiving means comprises a blade control plate for each of said blades, said control plate being pivotally mounted to said first hub plate, wherein said governor means comprises pivotal link means, connected between said second hub plate and said control plate, for drivingly connecting said second hub plate and said control plate, and means for shifting said second hub plate relative to said first hub plate.
Claim 6
Dependent Claim
40 words
A wind motor arrangement according to claim 4, wherein said means for shifting comprises a plurality of hinges interconnecting said hub plates, and weight means associated therewith for adjusting the spacing between said plates under the effect of centrifugal force.
Claim 7
Dependent Claim
89 words
A wind motor arrangement according to claim 5, comprising first spring means of a first load rating for restricting relative movement between said hub plates, upon motor start-up, under the influence of said means for shifting until said minimum operational speed is reached and second spring means of a second load rating higher than that of said first spring means for restricting adjustment of said blades from said second tip speed ratio forming angle, upon further increases in speed, until speeds in excess of normal operational speeds are reached.
Claim 8
Dependent Claim
49 words
A wind motor arrangement according to claim 2, wherein said governor means includes cam and cam follow means associated with one of said blade and blade receiving means, respectively, for adjusting the angular orientation of the blades in response to radial movements thereof with respect to the mounting hub.
Claim 9
Dependent Claim
37 words
A wind motor arrangement according to claim 4, wherein said means for shifting comprises hinge means interconnected between said hub plates and fluid piston-cylinder means connected to said hinge means for adjusting the spacing between said plates.
Claim 10
Dependent Claim
26 words
A wind motor according to claim 4, wherein said means for shifting comprises fluid piston-cylinder means interconnected between said hub plates for varying the spacing therebetween.
Claim 11
Dependent Claim
36 words
A wind motor according to claim 1, wherein said hub is rotatably mounted upon a tower and hydraulic circuit means are provided for transmitting power produced by said blades to a base area of the tower.
Claim 12
Dependent Claim
54 words
A wind motor according to claim 6, wherein said second spring means comprises a cylinder within which a piston member is displaceable in opposition to the force of a compression spring located in said cylinder, said piston member having a piston rod which is slidably received within a slot formed in said weight means.
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |