US3792299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stator for electric motors
Assignee: SKF Industrial Trading and Development Co BV
•
Filing: 1972-05-17
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Granted: 1974-02-12
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Expires: 1992-05-17
Abstract
Abstract An electric rotary machine having a stator and a rotor, an annular air gap between the stator and the rotor, said stator comprising an outer annular yoke and a plurality of radially directed stator teeth circumferentially spaced apart to define a plurality of openings between adjacent teeth and extending the full radial depth of the teeth, stator windings in the openings between the stator teeth and a moulding adjacent axial ends of the stator forming an insulation for the stator windings and locating and holding together the stator teeth and stator windings as a rigid assembly, the inner ends of said teeth being formed with pointed tooth shoulders wherein adjacent shoulders are closely spaced apart to provide a narrow gap therebetween.
Inventors
- 👤 S Hallerback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:04
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/50; H02K1/00; H02K1/06; H02K1/12; H02K1/16; H02K15/00; H02K15/12; H02K15/14; H02K3/32; H02K3/38; H02K5/00; H02K5/04; H02K5/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
An electric rotary machine having a stator and a rotor, an annular air gap between the stator and the rotor, said stator comprising an outer annular yoke and a plurality of radially directed stator teeth circumferentially spaced apart to define a plurality of openings between adjacnet teeth and extending the full radial depth of the teeth, and which are open in radially outward directions, stator windings in the openings between the stator teeth and moulding adjacent axial ends of the stator forming an insulation for the stator windings and locating and holding together the stator teeth and stator windings as a rigid assembly, the inner ends of said teeth being formed with pointed tooth shoulders wherein adjacent shoulders are closely spaced apart to provide a narrow gap therebetween, said stator yoke and stator teeth being joined together with a moulding compound.
Claim 2
Dependent Claim
141 words
An electric rotary machine having a stator and a rotor, an annular air gap between the stator and the rotor, said stator comprising an outer annular yoke and a plurality of radially directed stator teeth circumferentially spaced apart to define a plurality of openings between adjacnet teeth and extending the full radial depth of the teeth, and which are open in radially outward directions, stator windings in the openings between the stator teeth and moulding adjacent axial ends of the stator forming an insulation for the stator windings and locating and holding together the stator teeth and stator windings as a rigid assembly, the inner ends of said teeth being formed with pointed tooth shoulders wherein adjacent shoulders are closely spaced apart to provide a narrow gap therebetween, said stator yoke and stator teeth being joined together with a moulding compound.
Claim 3
Dependent Claim
32 words
An electric rotary machine as claimed in claim 1 wherein said moulding includes aligning and abutment surfaces for bearing support members in the stator end surface radially inside the stator end windings.
References Cited (Backward Citations)
US2465296A
Cited
US2512351A
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US2611930A
Cited
US2792511A
Cited
US2922902A
Cited
US3194993A
Cited
US3122667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |