US3289924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible blade fan
Assignee: Household Manufacturing Inc
•
Filing: 1965-05-10
•
Granted: 1966-12-06
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:56
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/06; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/38; F04D29/382
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A FAN STRUCTURE INCLUDING A SPIDER HAVING ARMS EXTENDING RADIALLY OUTWARD FROM A CENTRAL HUB PORTION, CLAMP MEMBERS OVERLYING ONE FACE OF EACH OF SAID ARMS AND EXTENDING BEYOND THE ENDS OF SAID ARMS, EACH OF SAID CLAMP MEMBERS HAVING ITS MARGINAL PORTION ADJACENT THE LEADING EDGE OF ITS RESPECTIVE ARM FOLDED UPON ITSELF TO PROVIDE A GENERALLY U-SHAPED CONFIGURATION, A FLEXIBLE FAN BLADE EXTENDING INTO EACH OF SAID CLAMP MEMBERS, A BACKING PLATE OVERLYING EACH OF SAID BLADES AND EXTENDING INTO SAID CLAMP MEMBER AND SUBSTANTIALLY TO THE TRAILING EDGE OF THE ARM, AND FASTENING MEANS SPACED ALONG THE LENGTH OF EACH ARM TO RIGIDLY JOIN THE ARM, CLAMP MEMBER, BLADE AND BACKING PLATE, WHEREBY STRESS IN THE BLADES TO FLEXING OF THE BLADES AND THE BACKING PLATES IS MORE EVENLY DISTRIBUTED ACROSS THE WIDTH OF THE BLADE AND STRESS CONCENTRATION AT SAID FASTENING MEANS IS AVOIDED.
Claim 2
Dependent Claim
148 words
A FAN STRUCTURE INCLUDING A SPIDER HAVING ARMS EXTENDING RADIALLY OUTWARD FROM A CENTRAL HUB PORTION, CLAMP MEMBERS OVERLYING ONE FACE OF EACH OF SAID ARMS AND EXTENDING BEYOND THE ENDS OF SAID ARMS, EACH OF SAID CLAMP MEMBERS HAVING ITS MARGINAL PORTION ADJACENT THE LEADING EDGE OF ITS RESPECTIVE ARM FOLDED UPON ITSELF TO PROVIDE A GENERALLY U-SHAPED CONFIGURATION, A FLEXIBLE FAN BLADE EXTENDING INTO EACH OF SAID CLAMP MEMBERS, A BACKING PLATE OVERLYING EACH OF SAID BLADES AND EXTENDING INTO SAID CLAMP MEMBER AND SUBSTANTIALLY TO THE TRAILING EDGE OF THE ARM, AND FASTENING MEANS SPACED ALONG THE LENGTH OF EACH ARM TO RIGIDLY JOIN THE ARM, CLAMP MEMBER, BLADE AND BACKING PLATE, WHEREBY STRESS IN THE BLADES TO FLEXING OF THE BLADES AND THE BACKING PLATES IS MORE EVENLY DISTRIBUTED ACROSS THE WIDTH OF THE BLADE AND STRESS CONCENTRATION AT SAID FASTENING MEANS IS AVOIDED.
References Cited (Backward Citations)
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Cited
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |