US4065225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multivane windmill
Assignee: Individual
•
Filing: 1976-04-22
•
Granted: 1977-12-27
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Expires: 1996-04-22
Abstract
Abstract A windmill having a plurality of pairs of diametrically opposed vanes mounted for rotation about a horizontal axis in alignment with the wind. The pairs of vanes are supported in uniformly spaced relationship to each other axially of the axis of rotation and each successive pair is indexed circumferentialy in the direction of rotation relative to the prior pair. The vanes are automatically moved to a less efficient position as the speed of the wind increases to limit the maximum speed of the windmill.
Inventors
- 👤 William D. Allison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:19
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/022; F03D7/0224; F03D13/00; F03D13/20; F03D80/00; F03D80/80; F03D80/88; F03D80/70; F03D9/00; F03D9/20; F03D9/25; F05; F05B; F05B2240/00; F05B2240/40; F05B2260/00; F05B2260/70; F05B2260/74; F05B2260/75; F05B2260/77; F05B2260/78; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E10/728
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A windmill comprising; a rotor rotatable on a horizontal axis extending in the direction of the wind, said rotor comprising a plurality of pairs of diametrically opposed vanes, said vanes being pitched equally and in the same direction to cause rotation of the rotor in one direction, each pair of vanes progressing rearwardly away from the forward end of the axis being offset circumferentially relative to the preceding pair of vanes and in the direction of rotation of the rotor, said rotor including a hub assembly including an axially extending torque member, a support member for each pair of vanes extending radially and in opposite directions from said torque member, and a shaft passing through all of said support members and retaining said support members fixed relative to said torque member.
Claim 2
Dependent Claim
131 words
A windmill comprising; a rotor rotatable on a horizontal axis extending in the direction of the wind, said rotor comprising a plurality of pairs of diametrically opposed vanes, said vanes being pitched equally and in the same direction to cause rotation of the rotor in one direction, each pair of vanes progressing rearwardly away from the forward end of the axis being offset circumferentially relative to the preceding pair of vanes and in the direction of rotation of the rotor, said rotor including a hub assembly including an axially extending torque member, a support member for each pair of vanes extending radially and in opposite directions from said torque member, and a shaft passing through all of said support members and retaining said support members fixed relative to said torque member.
Claim 3
Dependent Claim
34 words
The combination of claim 1 in which said hub includes an elongated tubular drive member extending longitudinally from and concentrically with said hub, said shaft extending through said drive member and said support members.
Claim 4
Dependent Claim
17 words
The combination of claim 2 wherein the tubular drive member is nonrotatably connected to said torque member.
Claim 5
Dependent Claim
23 words
The combination of claim 3 and further comprising bearing means supporting a portion of said drive member at one end of said rotor.
Claim 6
Dependent Claim
56 words
The combination of claim 2 and further comprising a torque member having axially spaced walls, said walls maintaining said shaft axially aligned with said torque member, and an additional wall spaced from one of said walls, a tubular drive member supported in said additional wall and on said shaft for nonrotatable connection with said torque member.
Claim 7
Dependent Claim
21 words
The combination of claim 2 and further comprising means maintaining said drive member and shaft axially fixed relative to each other.
References Cited (Backward Citations)
CA560874A
Cited
US441519A
Cited
BE500792A
Cited
US244971A
Cited
FR411225A
Cited
US1073413A
Cited
US1142502A
Cited
US1498978A
Cited
US1516472A
Cited
US1707235A
Cited
US1686214A
Cited
US1982039A
Cited
US1986752A
Cited
US2096860A
Cited
FR988883A
Cited
FR922918A
Cited
FR982600A
Cited
US3032119A
Cited
US3942026A
Cited
ATA162478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |