Patent US3609420A successfully refreshed from Google Patents.
US3609420A
Expired / Lapsed
US
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Liquid-cooled dynamoelectric machines
Assignee: Toshiba Corp
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Filing: 1969-09-29
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Granted: 1971-09-28
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Expires: 1989-09-29
Abstract
Abstract A liquid-cooled dynamoelectric machine wherein the rotor is enclosed by a liquid-tight nonmagnetic cylindrical shielding member and cooling liquid is sprayed directly upon hightemperature portions of the stator such as end turns of the armature winding.
Inventors
- 👤 Junpei Inagaki
- 👤 Moriyoshi Sakamoto
- 👤 Tsuneo Nakakita
- 👤 Yasuaki Kanda
- 👤 Hiroyuki Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:23
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19; H02K9/197; H02K19/00; H02K19/02; H02K19/10; H02K19/103
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
A liquid-cooled dynamoelectric machine comprising: a stator carrying an armature winding; a rotor, an airgap being formed between said rotor and said stator; a nonmagnetic generally cylindrical shielding member at least partially surrounding said rotor and extending through said airgap between said stator and rotor, the opposite ends of said shielding member being connected to stationary members of said machine in a liquid-tight manner to seal said rotor from said cooling liquid, said shielding member including a cutout portion longitudinally extending along the whole length thereof whereby said shielding member is urged against the inner periphery of the stator member; and means to spray cooling liquid directly upon high-temperature portions of the armature winding of said stator.
Claim 2
Dependent Claim
117 words
A liquid-cooled dynamoelectric machine comprising: a stator carrying an armature winding; a rotor, an airgap being formed between said rotor and said stator; a nonmagnetic generally cylindrical shielding member at least partially surrounding said rotor and extending through said airgap between said stator and rotor, the opposite ends of said shielding member being connected to stationary members of said machine in a liquid-tight manner to seal said rotor from said cooling liquid, said shielding member including a cutout portion longitudinally extending along the whole length thereof whereby said shielding member is urged against the inner periphery of the stator member; and means to spray cooling liquid directly upon high-temperature portions of the armature winding of said stator.
Claim 3
Dependent Claim
21 words
A dynamoelectric machine according to claim 1 wherein said nonmagnetic shielding member is comprised of glass cloth impregnated with cured resin.
Claim 4
Dependent Claim
31 words
A dynamoelectric machine according to claim 1 wherein said armature winding has end turns extending beyond the stator core and said cooling liquid is sprayed directly upon said extending end turns.
Claim 5
Dependent Claim
42 words
A dynamoelectric machine according to claim 3 wherein said machine includes two stationary end members at respective ends thereof and comprising two nonmagnetic shielding members, each being connected between opposite sides of said stator and respective stationary end members of said machine.
Claim 6
Dependent Claim
28 words
A dynamoelectric machine according to claim 1 wherein said nonmagnetic shielding member is cemented to the inner periphery of the stator member by means of a bonding agent.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |