Patent US3290526A successfully refreshed from Google Patents.
US3290526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction motor rotor
Assignee: Westinghouse Electric Corp
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Filing: 1963-08-05
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Granted: 1966-12-06
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Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 John B Wren
- 👤 James W York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:18
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/02; H02K17/00; H02K17/02; H02K17/16; H02K17/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A ROTOR MEMBER FOR AN INDUCTION MOTOR COMPRISING AN ELONGAGED GENERALLY CYLINDRICAL CORE MEMBER HAVING A PLURALITY OF LONGITUDINALLY EXTENDING SLOTS DISPOSED IN SPACED RELATION ABOUT THE LATERAL PERIPHERY THEREOF, A CONDUCTOR BAR COMBINATION DISPOSED IN EACH OF AT LEAST SOME OF SAID SLOTS, A RESISTANCE RING JOINED TO THE ENDS OF SAID BAR COMBINATIONS ADJACENT EACH END OF SAID CORE MEMBER, EACH OF SAID BAR COMBINATIONS HAVING LONGITUDINALLY AND RADIALLY COEXTENDING GENERALLY PARALLEL PORTIONS PROVIDING PARALLEL CURRENT PATHS AND FORMED FROM DIFFERENT HIGH TEMPERATURE STRENGTH MATERIALS, AT LEAST ONE OF SAID PORTIONS FORMED FROM A MATERIAL COMPRISING NICKEL AND HAVING A MAGNETIC PERMEABILITY AS HIGH AS THAT OF NICKEL AND A MELTHIGN POINT IN EXCESS OF 1083* C. AND HAVING A RELATIVELY HIGH ELECTRICAL CONDUCTIVITY AS COMPARED TO THAT OF ELETRICAL STEEL, ANOTHER OF SAID PORTIONS FORMED FROM A MATERIAL HAVING A MAGNETIC PERMEABILITY LOWER THAN THE FIRST MENTIONED MAGNETIC PERMEABILITY AND FURTHER HAVING A MELTING POINT IN EXCESS OF 1083 C.
Claim 2
Dependent Claim
163 words
A ROTOR MEMBER FOR AN INDUCTION MOTOR COMPRISING AN ELONGAGED GENERALLY CYLINDRICAL CORE MEMBER HAVING A PLURALITY OF LONGITUDINALLY EXTENDING SLOTS DISPOSED IN SPACED RELATION ABOUT THE LATERAL PERIPHERY THEREOF, A CONDUCTOR BAR COMBINATION DISPOSED IN EACH OF AT LEAST SOME OF SAID SLOTS, A RESISTANCE RING JOINED TO THE ENDS OF SAID BAR COMBINATIONS ADJACENT EACH END OF SAID CORE MEMBER, EACH OF SAID BAR COMBINATIONS HAVING LONGITUDINALLY AND RADIALLY COEXTENDING GENERALLY PARALLEL PORTIONS PROVIDING PARALLEL CURRENT PATHS AND FORMED FROM DIFFERENT HIGH TEMPERATURE STRENGTH MATERIALS, AT LEAST ONE OF SAID PORTIONS FORMED FROM A MATERIAL COMPRISING NICKEL AND HAVING A MAGNETIC PERMEABILITY AS HIGH AS THAT OF NICKEL AND A MELTHIGN POINT IN EXCESS OF 1083* C. AND HAVING A RELATIVELY HIGH ELECTRICAL CONDUCTIVITY AS COMPARED TO THAT OF ELETRICAL STEEL, ANOTHER OF SAID PORTIONS FORMED FROM A MATERIAL HAVING A MAGNETIC PERMEABILITY LOWER THAN THE FIRST MENTIONED MAGNETIC PERMEABILITY AND FURTHER HAVING A MELTING POINT IN EXCESS OF 1083 C.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |