Patent US3834617A successfully refreshed from Google Patents.
US3303995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan motor cooling arrangement
Assignee: Rotron Manufacturing Co Inc
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Filing: 1964-09-08
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Granted: 1967-02-14
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 John W Boeckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:30
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06; F; F04; F04D; F04D19/00; F04D19/002; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; F04D25/08; F04D25/082; F04D29/00; F04D29/26; F04D29/32; F04D29/325; F04D29/329; F04D29/58; F04D29/5806; F24; F24F; F24F7/00; F24F7/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A FAN COMPRISING A MOTOR, A HUB MEMBER SUBSTANTIALLY SURROUNDING SAID MOTOR INCLUDING A HOLLOW SLEEVE PORTION CLOSED AT ONE END BY AN END WALL PROVIDED WITH A PLURALITY OF APERTURES ADJACENT ITS CIRCUMFERENTIAL EDGE, A PLURALITY OF PROPELLER BLADES ON SAID SLEEVE PORTION, MEANS COUPLING SAID HUB MEMBER TO ONE END OF SAID MOTOR FOR ROTATION THEREWITH, SAID PROPELLER BLADES THEREBY CREATING AN AIR FLOW MOVING IN A DIRECTION FROM SAID END WALL TO THE OTHER END OF SAID SLEEVE PORTION, AND CENTRIFUGAL IMPELLER MEANS ON THE INTERIOR SURFACE OF SAID END WALL FOR CREATING AN AIR FLOW ACROSS SAID MOTOR AND WITHIN SAID HUB MEMBER MOVING IN A DIRECTION OPPOSITE TO THAT OF THE AIR FLOW CREATED BY SAID PROPELLER BLADES, SAID IMPELLER MEANS DISCHARGING ITS AIR FLOW THROUGH THE APERTURES IN SAID END WALL.
Claim 2
Dependent Claim
137 words
A FAN COMPRISING A MOTOR, A HUB MEMBER SUBSTANTIALLY SURROUNDING SAID MOTOR INCLUDING A HOLLOW SLEEVE PORTION CLOSED AT ONE END BY AN END WALL PROVIDED WITH A PLURALITY OF APERTURES ADJACENT ITS CIRCUMFERENTIAL EDGE, A PLURALITY OF PROPELLER BLADES ON SAID SLEEVE PORTION, MEANS COUPLING SAID HUB MEMBER TO ONE END OF SAID MOTOR FOR ROTATION THEREWITH, SAID PROPELLER BLADES THEREBY CREATING AN AIR FLOW MOVING IN A DIRECTION FROM SAID END WALL TO THE OTHER END OF SAID SLEEVE PORTION, AND CENTRIFUGAL IMPELLER MEANS ON THE INTERIOR SURFACE OF SAID END WALL FOR CREATING AN AIR FLOW ACROSS SAID MOTOR AND WITHIN SAID HUB MEMBER MOVING IN A DIRECTION OPPOSITE TO THAT OF THE AIR FLOW CREATED BY SAID PROPELLER BLADES, SAID IMPELLER MEANS DISCHARGING ITS AIR FLOW THROUGH THE APERTURES IN SAID END WALL.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |