US3577024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-cooled dynamoelectric machines
Assignee: Toshiba Corp
•
Filing: 1969-09-29
•
Granted: 1971-05-04
•
Expires: 1989-09-29
Abstract
Abstract In a liquid-cooled dynamoelectric machine comprising a stator, a rotor, and means to spray cooling liquid directly upon heated portions of the stator, the peripheral surface of the rotor is provided with a pair of oppositely directed helical grooves or a pair of oppositely inclined surfaces to create components of force which act to prevent the cooling liquid from entering into the airgap between the stator and the rotor.
Inventors
- 👤 Junpei Inagaki
- 👤 Moriyoshi Sakamoto
- 👤 Tsuneo Nakaita
- 👤 Hiroyuki Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:25
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2987637A
Cited
US2991380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |