US4649284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windmill
Assignee: Individual
•
Filing: 1985-02-07
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Granted: 1987-03-10
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Expires: 2005-02-07
Abstract
Abstract A windmill includes a supporting frame, a vertical transmission shaft rotatably mounted in the supporting frame, a plurality of fan blades, each having two bending edges longitudinally formed on the two vertical edges of the blade, horizontally pivotedly mounted on the vertical transmission shaft, a sweeping cleaner formed on the lower portion of the transmission shaft to remove the snow or dirts on a power generator, a power generator formed on the lower end of the transmission shaft, and a high-speed braking clutch automatically braking the rotation of the transmission shaft under stronger wind pressure for safely protecting the power generator.
Inventors
- 👤 Leu Hsech-Pen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/0244; F03D7/0248; F03D7/06; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/74; Y10; Y10S; Y10S416/00; Y10S416/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
229 words
A windmill comprising: a supporting frame; a plurality of vertical shaft portions coaxially connected in series to form an integrated vertical transmission shaft rotatably mounted in said supporting frame; a plurality of fan blades each transversely pivotedly mounted on said vertical shaft portion; a sweeping cleaner fixed on the lower portion of said vertical transmission shaft; a power generator having a set of gears for accelerating rotation speed as driven by said vertical transmission shaft and formed on the lower end of said transmission shaft; and a high-speed braking clutch operatively braking the rotation of said transmission shaft and said power generator, the improvement which comprises: said fan blade formed with two bending edges respectively longitudinally protruding from the two vertical edges of said fan blade in a direction opposite to the rotation direction of said fan blade under wind pressure, and formed with a horizontal shaft having its inner end pivotedly mounted in a roller bearing within a horizontal bush of said vertical shaft portion and having its outer end pivotedly mounted in a vertical link suspensively holding the horizontal shaft about said vertical shaft portion, said inner end of said horizontal shaft of said fan blade formed with a vertical rod thereunder to be operatively obstructed by a limiting rod transversely extending outwards from said horizontal bush of said vertical shaft portion when feathering said fan blade.
Claim 2
Dependent Claim
229 words
A windmill comprising: a supporting frame; a plurality of vertical shaft portions coaxially connected in series to form an integrated vertical transmission shaft rotatably mounted in said supporting frame; a plurality of fan blades each transversely pivotedly mounted on said vertical shaft portion; a sweeping cleaner fixed on the lower portion of said vertical transmission shaft; a power generator having a set of gears for accelerating rotation speed as driven by said vertical transmission shaft and formed on the lower end of said transmission shaft; and a high-speed braking clutch operatively braking the rotation of said transmission shaft and said power generator, the improvement which comprises: said fan blade formed with two bending edges respectively longitudinally protruding from the two vertical edges of said fan blade in a direction opposite to the rotation direction of said fan blade under wind pressure, and formed with a horizontal shaft having its inner end pivotedly mounted in a roller bearing within a horizontal bush of said vertical shaft portion and having its outer end pivotedly mounted in a vertical link suspensively holding the horizontal shaft about said vertical shaft portion, said inner end of said horizontal shaft of said fan blade formed with a vertical rod thereunder to be operatively obstructed by a limiting rod transversely extending outwards from said horizontal bush of said vertical shaft portion when feathering said fan blade.
Claim 3
Dependent Claim
151 words
A windmill according to claim 1, wherein said high-speed braking clutch includes a plurality of semi-spherical cups fixed on the highest position of said supporting frame, a blower driven by said cups under wind pressure, a wind-opening door resiliently held by a spring as subjected to be opened by said blower under stronger wind and having a conductive pusher, a pair of contactors operatively contacted by said pusher, a pair of wires connected with a power source and an electromagnetically-operating clutch having a lower pulley formed on the lower end of a clutch shaft coupled to a gear shaft of said set of gears of said power generator, a braking disc formed on the upper end of said clutch shaft and a plurality of screws fixed with rubber pads thereunder to frictionally brake said braking disc and said clutch shaft, to thereby brake the set of gears of said power generator.
Claim 4
Dependent Claim
26 words
A windmill according to claim 1, wherein said sweeping cleaner is formed with at least a pair of coiled sweepers fixed on said vertical transmission shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |