US3789252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-part stator for large rotating electrical machines
Assignee: BBC Brown Boveri AG Switzerland
•
Filing: 1972-02-14
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Granted: 1974-01-29
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Expires: 1992-02-14
Abstract
Abstract A two-part stator for large rotating electrical machines which consists of an outer non-wound stator part sub-divided in the axial direction into annular laminated sections and a unitary inner laminated part to which the winding is applied.
Inventors
- 👤 K Abegg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:44
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/18; H02K1/185; H02K1/16; H02K1/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A two-part stator for large diameter rotating electrical machines consisting of an outer laminated non-toothed stator member, an inner laminated stator member spaced from said outer stator member and provided with teeth for carrying a stator winding, said outer stator member being subdivided in the axial direction into annular laminated parts and the inner stator member being undivided in the axial direction, and bolt means for connecting together the inner and outer stators in spaced relation and to compress the laminated body of the inner stator, thereby enabling the outer stator to be assembled on the inner stator at the installation site.
Claim 2
Dependent Claim
102 words
A two-part stator for large diameter rotating electrical machines consisting of an outer laminated non-toothed stator member, an inner laminated stator member spaced from said outer stator member and provided with teeth for carrying a stator winding, said outer stator member being subdivided in the axial direction into annular laminated parts and the inner stator member being undivided in the axial direction, and bolt means for connecting together the inner and outer stators in spaced relation and to compress the laminated body of the inner stator, thereby enabling the outer stator to be assembled on the inner stator at the installation site.
Claim 3
Dependent Claim
15 words
A two-part stator as claimed in claim 1 wherein said bolt means comprise press bolts.
Claim 4
Dependent Claim
24 words
Two-part stator as in claim 2, characterised in that the press bolts consist of tubes through which a cooling medium is caused to flow.
Claim 5
Dependent Claim
23 words
Two-part stator as in claim 1, characterised that a cooling medium flows through the axial intermediate space between the inner and outer stator.
Claim 6
Dependent Claim
28 words
Two-part stator as in claim 1, characterised in that the axial intermediate space between the inner and outer stator is at least partly filled with an insulating material.
Claim 7
Dependent Claim
24 words
Two-part stator as in claim 5, characterised in that the inner stator is joined to the outer stator by means of a synthetic resin.
References Cited (Backward Citations)
US1196345A
Cited
US2618756A
Cited
US3146605A
Cited
US3221195A
Cited
US3445702A
Cited
US3508093A
Cited
US3531667A
Cited
US3652889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |