Patent US3228475A successfully refreshed from Google Patents.
US3228475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windmill
Assignee: Individual
•
Filing: 1962-11-06
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Granted: 1966-01-11
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Expires: 1982-11-06
Abstract
No abstract record available.
Inventors
- 👤 Worthmann Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:09
CPC Classifications
F; F03; F03D; F03D1/00; F03D1/04; F03D1/06; F03D1/0608; F03D9/00; F03D9/30; F03D9/32; F03D9/20; F03D9/25; F05; F05B; F05B2240/00; F05B2240/20; F05B2240/21; F05B2240/221; F05B2240/2211; F05B2240/2213; F05B2250/00; F05B2250/50; F05B2250/501; F05B2250/5012; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E10/728
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
A WINDMILL, COMPRISING A HUB HAVING A SUBSTANTIALLY PLATE-LIKE DISCOID BASE AND A HOLLOW CONICAL MANTLE WHICH HAS AN EXPOSED SIDE ARRANGED TO FACE THE WIND AND WHICH IS INTEGRAL WITH SAID BASE SAID MANTLE AND SAID BASE DEFINING BETWEEN THEMSELVES A CHAMBER; A PLURALITY OF CLOSELLY ADJACENT TRAPEZODIALLY SHAPED INCLINED VANES ARRANGED TO OVERLAP EACH OTHER WHEN VIEWED IN THE DIRECTION OF THE WIND AND BEING RIGIDLY SECURED TO AND PROJECTING FROM SAID MANTLE IN CLOSE PROXIMITY OF SAID BASE SO AS TO FORM A RING ABOUT THE BASE AND TO DRIVE THE HUB WHEN THE EXPOSED SIDE OF SAID MANTLE IS PLACED IN THE WIND, EACH OF SAID VANES HAVING A LEADING EDGE PORTION WHICH IS SUBSTANTIALLY PERPENDICULAR TO THE OUTLINE OF SAID MANTLE; AND A DRIVEN SHAFT HAVING AN END PORTION COAXIALLY SECURED TO SAID BASE.
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |