Patent US3265047A successfully refreshed from Google Patents.
US3265047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling fans
Assignee: Dowty Hydraulic Units Ltd
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Filing: 1964-05-14
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Granted: 1966-08-09
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Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur E H Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:19
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362; F04D29/368; F01; F01P; F01P7/00; F01P7/02; F01P7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
A COMBINED WARM-UP SHUTTER AND COOLING FAN FOR USE IN CONJUNCTION WITH A DUCT IN THE COOLING SYSTEM OF A MOTOR VEHICLE''S ENGINE, AND ARRANGED TO BE DRIVEN BY SUCH ENGINE, SAID SHUTTER AND FAN COMPRISING A HUB ROTATIVE IN THE DUCT, A PLURALITY OF BLADES MOUNTED UPON SAID HUB FOR CHANGE OF THEIR PITCH BETWEEN FINE AND COARSE PITCH LIMIT POSITIONS, AND SO SHAPED THAT IN THEIR FINE PITCH LIMIT POSITIONS COOPERATIVELY THEY SUBSTANTIALLY CLOSE THE DUCT, SPRING DEVICES DISPOSED GENERALLY RADIALLY BETWEEN THE HUB AND EACH BLADE AND BIASED TO URGE SAID BLADES TO THEIR FINE PITCH LIMIT POSITION, AND MEANS RESPONSIVE TO ENGINE-OPERATING TEMPERATURE AND OPERATIVELY CONNECTED TO THE BLADES FOR ADJUSTMENT OF THEIR PITCH, SAID TEMPERATURE-RESPONSIVE MEANS BEING ARRANGED TO INCREASE THE PITCH OF THE BLADES AUTOMATICALLY FROM FINE PITCH LIMIT POSITION, IN OPPOSITION TO SAID SPRING DEVICES, UPON INCREASE OF THE ENGINE''S OPERATING TEMPERATURE FROM COLD TO A WARMER OPERATING TEMPERATURE, AND CONVERSELY TO PERMIT DECREASE IN THE PITCH OF THE BLADES BY SAID SPRING DEVICES, UPON DECREASE OF THE ENGINE''S OPERATING TEMPERATURE BELOW A PREDETERMINED VALUE, THEREBY TO MAINTAIN THE ENGINE''S TEMPERATURE WITHIN AN OPTIMUM RANGE DURING ITS OPERATION.
Claim 2
Dependent Claim
195 words
A COMBINED WARM-UP SHUTTER AND COOLING FAN FOR USE IN CONJUNCTION WITH A DUCT IN THE COOLING SYSTEM OF A MOTOR VEHICLE''S ENGINE, AND ARRANGED TO BE DRIVEN BY SUCH ENGINE, SAID SHUTTER AND FAN COMPRISING A HUB ROTATIVE IN THE DUCT, A PLURALITY OF BLADES MOUNTED UPON SAID HUB FOR CHANGE OF THEIR PITCH BETWEEN FINE AND COARSE PITCH LIMIT POSITIONS, AND SO SHAPED THAT IN THEIR FINE PITCH LIMIT POSITIONS COOPERATIVELY THEY SUBSTANTIALLY CLOSE THE DUCT, SPRING DEVICES DISPOSED GENERALLY RADIALLY BETWEEN THE HUB AND EACH BLADE AND BIASED TO URGE SAID BLADES TO THEIR FINE PITCH LIMIT POSITION, AND MEANS RESPONSIVE TO ENGINE-OPERATING TEMPERATURE AND OPERATIVELY CONNECTED TO THE BLADES FOR ADJUSTMENT OF THEIR PITCH, SAID TEMPERATURE-RESPONSIVE MEANS BEING ARRANGED TO INCREASE THE PITCH OF THE BLADES AUTOMATICALLY FROM FINE PITCH LIMIT POSITION, IN OPPOSITION TO SAID SPRING DEVICES, UPON INCREASE OF THE ENGINE''S OPERATING TEMPERATURE FROM COLD TO A WARMER OPERATING TEMPERATURE, AND CONVERSELY TO PERMIT DECREASE IN THE PITCH OF THE BLADES BY SAID SPRING DEVICES, UPON DECREASE OF THE ENGINE''S OPERATING TEMPERATURE BELOW A PREDETERMINED VALUE, THEREBY TO MAINTAIN THE ENGINE''S TEMPERATURE WITHIN AN OPTIMUM RANGE DURING ITS OPERATION.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |