US3619674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating electric machine with directly liquid-cooled stator winding
Assignee: ABB Norden Holding AB
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Filing: 1969-10-23
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Granted: 1971-11-09
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Expires: 1989-10-23
Abstract
Abstract A stator core with a directly liquid-cooled stator winding has a plurality of slits axially spaced along it perpendicular to the axis. Each slit contains a plurality of cooling blocks arranged together to extend around the periphery of the core. A substantially annular cooling tube is arranged in grooves in the blocks extending substantially tangentially, and is clamped in these grooves.
Inventors
- 👤 Bror Daimo
- 👤 John Franked
- 👤 Hans Landhult
- 👤 Birger Nordberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:10
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
Rotating electric machine according to claim 1, in which said grooves open in a surface of the cooling block lying in a radial plane and a lid (10) abutting said surface and formed of material having high heat conductivity contacts and exerts pressure on the cooling tube.
Claim 2
Dependent Claim
23 words
Rotating electric machine according to claim 1, in which said cooling tube runs through all the cooling members arranged beside each other tangentially.
Claim 3
Dependent Claim
29 words
Rotating electric machine according to claim 1, in which each cooling block is formed of an extruded body, the cross section of which has at least one groove therein.
Claim 4
Dependent Claim
47 words
Rotating electric machine according to claim 1, in which several cooling blocks are arranged radially one outside the other. 6. Rotating electric machine according to claim 5, in which said grooves are located in cooling block surfaces which are parallel with tangential planes of the stator core.
Claim 5
Dependent Claim
37 words
Rotating electric machine according to claim 1, in which the cooling tube has substantially oval cross section and the groove has an opening with radial dimension which is less than the maximum radial dimension of the tube.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |