Patent US3113229A successfully refreshed from Google Patents.
US3113229A
Expired / Lapsed
US
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Induced current electromagnetic torque transmitting couplings
Assignee: Harnischfeger Corp
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Filing: 1959-01-26
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Granted: 1963-12-03
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Henry S Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:24
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN ELECTROMAGNETIC TORQUE COUPLING COMPRISING A FIELD MEMBER AND AN INDUCED CURRENT MEMBER SEPARATED BY AN AIR GAP, SAID INDUCED CURRENT MEMBER BEING SUBJECT TO BE HEATED AS HIGH AS ABOUT 350* C. AND COMPRISING A BODY OF UNLAMINATED FERROMAGNETIC MATERIAL AND A SUBSTANTIALLY COEXTENSIVE FACING COMPRISING A THIN LAYER OF LOW RESISTANCE ELECTRICALLY CONDUCTIVE MATERIAL POSITIVELY UNITED TO SAID BODY AND ADJACENT SAID AIR GAP, IN FURTHER COMBINATION WITH BARS OF LOW RESISTANCE ELECTRICALLY CONDUCTIVE MATERIAL METALLURGICALLY BONDED TO SAID BODY AND BENEATH SAID FACING, SAID BARS BEING ELECTRICALLY DIRECTLY CONNECTED TO SAID FACING AND SAID BODY BEING CORRESPONDINGLY GROOVED TO RECEIVE SAID BARS.
Claim 2
Dependent Claim
105 words
AN ELECTROMAGNETIC TORQUE COUPLING COMPRISING A FIELD MEMBER AND AN INDUCED CURRENT MEMBER SEPARATED BY AN AIR GAP, SAID INDUCED CURRENT MEMBER BEING SUBJECT TO BE HEATED AS HIGH AS ABOUT 350* C. AND COMPRISING A BODY OF UNLAMINATED FERROMAGNETIC MATERIAL AND A SUBSTANTIALLY COEXTENSIVE FACING COMPRISING A THIN LAYER OF LOW RESISTANCE ELECTRICALLY CONDUCTIVE MATERIAL POSITIVELY UNITED TO SAID BODY AND ADJACENT SAID AIR GAP, IN FURTHER COMBINATION WITH BARS OF LOW RESISTANCE ELECTRICALLY CONDUCTIVE MATERIAL METALLURGICALLY BONDED TO SAID BODY AND BENEATH SAID FACING, SAID BARS BEING ELECTRICALLY DIRECTLY CONNECTED TO SAID FACING AND SAID BODY BEING CORRESPONDINGLY GROOVED TO RECEIVE SAID BARS.
References Cited (Backward Citations)
DE552428C
Cited
GB183845A
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US2419837A
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US2421860A
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US2462451A
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US2696570A
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US2773206A
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US2880335A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |