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US3753015A
Expired / Lapsed
US
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Rotor winding for an electrical machine
Assignee: Individual
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Filing: 1971-03-29
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Granted: 1973-08-14
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Expires: 1991-03-29
Abstract
Abstract Liquid-cooled rotor windings for turbo-alternators including an electrical-machine rotor winding with internally liquid-cooled conductors composed of a number of concentrically arranged coils, in which the cooling-liquid inlet and outlet taps are located between the coils in the coil ends of the winding, and the bends of the coils whereto said taps are connected are made more gradual than the adjacent bends of the next coils, while being made more gradual are the bends of turns of the coils placed below the turns of the coils onto which the taps are connected.
Inventors
- 👤 L Ugrjumov
- 👤 A Chigirinsky
- 👤 B Konovalov
- 👤 B Spivak
- 👤 D Karpman
- 👤 E Glider
- 👤 O Gradov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:43
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/12; H02K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
In an electrical-machine rotor with internally liquid-cooled conductors, comprising concentrically arranged bent coils; cooling-liquid inlet and outlet taps on said coils positioned between said coils in the coil ends of said rotor winding, the improvement comprising: the bends of the coil turns positioned below the tapped turns being made more gradual than the adjacent bends of turns in adjacent coils so as to form together with said adjacent adjoining coils an increased space for branching off.
Claim 2
Dependent Claim
76 words
In an electrical-machine rotor with internally liquid-cooled conductors, comprising concentrically arranged bent coils; cooling-liquid inlet and outlet taps on said coils positioned between said coils in the coil ends of said rotor winding, the improvement comprising: the bends of the coil turns positioned below the tapped turns being made more gradual than the adjacent bends of turns in adjacent coils so as to form together with said adjacent adjoining coils an increased space for branching off.
References Cited (Backward Citations)
GB998569A
Cited
US2965775A
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US3046424A
Cited
US3075104A
Cited
US3214617A
Cited
FR1363968A
Cited
US3476961A
Cited
FR1556165A
Cited
US3497737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |