US3226582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable torque induction motors
Assignee: Individual
•
Filing: 1962-09-12
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Granted: 1965-12-28
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Expires: 1982-09-12
Abstract
No abstract record available.
Inventors
- 👤 Beckwith Sterling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:35
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN AN INDUCTION MOTOR OF THE CHARACTER DESCRIBED, A PAIR OF AXIALLY ALINED STATORS SPACED FROM EACH OTHER, A PAIR OF SPACED ROTOR CORES, ONE OF SAID CORES BEING POSITIONED WITHIN EACH OF SAID STATORS WITH AN AIR GAP THEREBETWEE, EACH CORE HAVING A PLURALITY OF APERTURES AXIALLY THERETHROUGH, A PLURALITYY OF CONDUCTOR BARS MOUNTED IN AND EXTENDING ACROSS BOTH OF SAID CORES TO DEFINE A CYLINDRICAL CAGE THEREBETWEEN, AND FAN MEANS DRIVEN INDEPENDENTLY OF SAID MOTOR TO DRAW AIR FROM BETWEEN THE STATORS INTO SAID CAGE AND THROUGH THE APERTURES IN BOTH SAID ROTORS IN OPPOSITE DIRECTIONS AND THROUGH BOTH SAID AIR GAPS TO EFFECT COOLING OF SAID MOTOR.
Claim 2
Dependent Claim
110 words
IN AN INDUCTION MOTOR OF THE CHARACTER DESCRIBED, A PAIR OF AXIALLY ALINED STATORS SPACED FROM EACH OTHER, A PAIR OF SPACED ROTOR CORES, ONE OF SAID CORES BEING POSITIONED WITHIN EACH OF SAID STATORS WITH AN AIR GAP THEREBETWEE, EACH CORE HAVING A PLURALITY OF APERTURES AXIALLY THERETHROUGH, A PLURALITYY OF CONDUCTOR BARS MOUNTED IN AND EXTENDING ACROSS BOTH OF SAID CORES TO DEFINE A CYLINDRICAL CAGE THEREBETWEEN, AND FAN MEANS DRIVEN INDEPENDENTLY OF SAID MOTOR TO DRAW AIR FROM BETWEEN THE STATORS INTO SAID CAGE AND THROUGH THE APERTURES IN BOTH SAID ROTORS IN OPPOSITE DIRECTIONS AND THROUGH BOTH SAID AIR GAPS TO EFFECT COOLING OF SAID MOTOR.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |