Patent US3254288A successfully refreshed from Google Patents.
US3254288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed squirrel cage induction motor
Assignee: Individual
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Filing: 1962-09-14
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Granted: 1966-05-31
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Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Miles B Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:13
CPC Classifications
H; H02; H02K; H02K16/00; H02K16/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A SQUIRREL CAGE INDUCTION MOTOR OF THE TYPE HAVING ROTOR SECTIONS SPACED AXIALLY ALONG A DRIVING SHAFT AND A COMMON STATOR ELEMENT MOUNTED TO BE BROUGHT SUCCESSIVELY INTO SURROUNDING RELATION WITH SAID ROTOR SECTIONS; THE COMBINATION OF A SINGLE CAGE HIGH RESISTANCE ROTOR SECTION AND A DOUBLE CAGE ROTOR SECTION HAVING TWO SETS OF ROTOR CIRCUITS EACH WITH A PAIR OF END RINGS AND RESPECTIVELY FORMED BY A LOW RESISTANCE HIGH INDUCTIVE INNER CAGE, AND A HIGH RESISTANCE OUTER CAGE COMMON TO BOTH SAID ROTOR SECTIONS, THE PAIR OF END RINGS FOR SAID OUTER CAGE BEING SITUATED AT OPPOSITE ENDS OF THE ROTOR, ONE OF SAID LATTER PAIR OF END RINGS SITUATED BEYOND THE OUTER END OF ONE OF SAID ROTOR SECTIONS SPACED OUT OF DIRECT THERMAL CONTACT THERWITH.
Claim 2
Dependent Claim
130 words
IN A SQUIRREL CAGE INDUCTION MOTOR OF THE TYPE HAVING ROTOR SECTIONS SPACED AXIALLY ALONG A DRIVING SHAFT AND A COMMON STATOR ELEMENT MOUNTED TO BE BROUGHT SUCCESSIVELY INTO SURROUNDING RELATION WITH SAID ROTOR SECTIONS; THE COMBINATION OF A SINGLE CAGE HIGH RESISTANCE ROTOR SECTION AND A DOUBLE CAGE ROTOR SECTION HAVING TWO SETS OF ROTOR CIRCUITS EACH WITH A PAIR OF END RINGS AND RESPECTIVELY FORMED BY A LOW RESISTANCE HIGH INDUCTIVE INNER CAGE, AND A HIGH RESISTANCE OUTER CAGE COMMON TO BOTH SAID ROTOR SECTIONS, THE PAIR OF END RINGS FOR SAID OUTER CAGE BEING SITUATED AT OPPOSITE ENDS OF THE ROTOR, ONE OF SAID LATTER PAIR OF END RINGS SITUATED BEYOND THE OUTER END OF ONE OF SAID ROTOR SECTIONS SPACED OUT OF DIRECT THERMAL CONTACT THERWITH.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |