Patent US3356154A successfully refreshed from Google Patents.
US3356154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible blade engine cooling fan
Assignee: Ford Motor Co
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Filing: 1966-11-16
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Granted: 1967-12-05
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Robert L Cassidy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:53
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
182 words
AN ENGINE COOLING FAN HAVING A CENTRAL PLANAR HUB AND A PLURALITY OF RIGID ARMS EXTENDING OUTWARDLY OF SAID HUB, A PLURALITY OF FLEXIBLE BLADES EACH HAVING A FLAT LEADING PORTION OVERLYING AN ARM WITH THE PLANE OF THE FLAT PORTION INTERSECTING THE PLANE OF THE HUB AT AN ANGLE THERETO, EACH BLADE HAVING A CURVED TRAILING PORTION EXTENDING LATERIALLY OF ITS FLAT PORTION AND CURVED AWAY FROM THE PLANE OF SAID HUB, A SPACER PLATE INTERPOSED BETWEEN EACH ARM AND BLADE FLAT LEADING PORTION AND AN OUTERMOST CAP PLATE OVERLYING SAID BLADE FLAT LEADING PORTION, SECURING MEANS SECURING EACH ARM, SPACER PLATE, BLADE FLAT PORTION AND CAP PLATE IN LAMINATED RELATIONSHIP, AND EACH CAP PLATE HAVING A CURVED TRAILING EDGE CLOSELY ADJACENT TO SAID SECURING MEANS EXTENDING LONGITUDINALLY OF SAID CAP PLATE AND AWAY FROM THE PLANE OF THE BLADE THEREBENEATH, SAID CAP PLATE CURVED TRAILING EDGE PROVIDING STRESS RELIEF FOR SAID BLADE CURVED PORTION ADJACENT SAID SECURING MEANS AS THE LATTER IS FLEXED ABOUT SAID CURVED TRAILING EDGE TOWARD THE PLANE OF SAID PLANAR HUB UPON ROTATION OF SAID FAN.
Claim 2
Dependent Claim
182 words
AN ENGINE COOLING FAN HAVING A CENTRAL PLANAR HUB AND A PLURALITY OF RIGID ARMS EXTENDING OUTWARDLY OF SAID HUB, A PLURALITY OF FLEXIBLE BLADES EACH HAVING A FLAT LEADING PORTION OVERLYING AN ARM WITH THE PLANE OF THE FLAT PORTION INTERSECTING THE PLANE OF THE HUB AT AN ANGLE THERETO, EACH BLADE HAVING A CURVED TRAILING PORTION EXTENDING LATERIALLY OF ITS FLAT PORTION AND CURVED AWAY FROM THE PLANE OF SAID HUB, A SPACER PLATE INTERPOSED BETWEEN EACH ARM AND BLADE FLAT LEADING PORTION AND AN OUTERMOST CAP PLATE OVERLYING SAID BLADE FLAT LEADING PORTION, SECURING MEANS SECURING EACH ARM, SPACER PLATE, BLADE FLAT PORTION AND CAP PLATE IN LAMINATED RELATIONSHIP, AND EACH CAP PLATE HAVING A CURVED TRAILING EDGE CLOSELY ADJACENT TO SAID SECURING MEANS EXTENDING LONGITUDINALLY OF SAID CAP PLATE AND AWAY FROM THE PLANE OF THE BLADE THEREBENEATH, SAID CAP PLATE CURVED TRAILING EDGE PROVIDING STRESS RELIEF FOR SAID BLADE CURVED PORTION ADJACENT SAID SECURING MEANS AS THE LATTER IS FLEXED ABOUT SAID CURVED TRAILING EDGE TOWARD THE PLANE OF SAID PLANAR HUB UPON ROTATION OF SAID FAN.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |