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Patent US3213304A successfully refreshed from Google Patents.
US3213304A
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Fan-cooled electric motor
Assignee: Allis Chalmers Corp
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Filing: 1962-11-06
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Granted: 1965-10-19
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Expires: 1982-11-06
Abstract
No abstract record available.
Inventors
- 👤 George G Landberg
- 👤 Paul D Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:42
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H02K9/06; F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/287; H02K2213/00; H02K2213/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN AN ELECTRIC MOTOR HAVING A ROTOR; MEANS FOR COOLING SAID MOTOR COMPRISING A MEMBER MOUNTED FOR ROTATION WITH SAID ROTOR, AT LEAST ONE BLADE PIVOTALLY MOUNTED ON SAID MEMBER, RETAINING MEANS ON SAID MEMBER POSITIONED ON EITHER SIDE OF SAID BLADE TO LIMIT THE MOVEMENT OF SAID BLADE IN EACH DIRECTION RELATIVE TO SAID MEMBER, THE PORTION OF SAID BLADE RADIALLY INWARD OF SAID PIVOTAL MOUNT HAVING A GREATER MASS THAN THE PORTION OF SAID BLADE RADIALLY OUTWARD OF SAID PIVOTAL MOUNT WHEREBY SAID BLADE WILL ASSUME A REARWARDLY INCLINED POSITION RELATIVE TO A RADIUS OF SAID ROTOR REGARDLESS OF THE DIRECTION OF ROTATION OF SAID ROTOR.
Claim 2
Dependent Claim
108 words
IN AN ELECTRIC MOTOR HAVING A ROTOR; MEANS FOR COOLING SAID MOTOR COMPRISING A MEMBER MOUNTED FOR ROTATION WITH SAID ROTOR, AT LEAST ONE BLADE PIVOTALLY MOUNTED ON SAID MEMBER, RETAINING MEANS ON SAID MEMBER POSITIONED ON EITHER SIDE OF SAID BLADE TO LIMIT THE MOVEMENT OF SAID BLADE IN EACH DIRECTION RELATIVE TO SAID MEMBER, THE PORTION OF SAID BLADE RADIALLY INWARD OF SAID PIVOTAL MOUNT HAVING A GREATER MASS THAN THE PORTION OF SAID BLADE RADIALLY OUTWARD OF SAID PIVOTAL MOUNT WHEREBY SAID BLADE WILL ASSUME A REARWARDLY INCLINED POSITION RELATIVE TO A RADIUS OF SAID ROTOR REGARDLESS OF THE DIRECTION OF ROTATION OF SAID ROTOR.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |