Patent US2197634A successfully refreshed from Google Patents.
Patent US3740598A successfully refreshed from Google Patents.
US3740598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motors or other electric rotary machines and method for the manufacture thereof
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1971-11-01
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Granted: 1973-06-19
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Expires: 1991-11-01
Abstract
Abstract An electric motor or other electric rotary machine comprising bearing support means of cup-like shape mounted to the stator radially inside the stator end windings is provided with a thin walled lining fitting closely in the stator bore and projecting slightly from the stator end face. The projecting lining portion serves as abutment and aligning means for the cup-like bearing support without having to take up mechanical loads. The lining blanks off the stator bore against bounding agents or molding compounds employed for joining the bearing support means to the stator and for embedding and insulating the stator windings in the stator slots.
Inventors
- 👤 S Hallerback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:46
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/16; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/15
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
An electric motor apparatus comprising a stator core having windings, a rotor, bearing support means rotatably supporting the rotor in a predetermined position relative to the stator, a thinwalled cylindrical liner of non-magnetic material disposed interiorly of said stator and extending axially beyond the axial end faces of the stator core thereby defining an alignment surface concentric with the rotor cavity of said stator and an axial abutment surface generally at substantially right angles to said rotor, said bearing support means being disposed at opposite axial ends of said liner and each bearing support means comprising a cup-shaped member attached at its outer end to the stator by means of a circumferentially extending bonding member, each of said cup-shaped members at its inner end supporting a rotor bearing means, each said cup-shaped member formed at its outer end with an abutment shoulder and a cylindrical alignment surface engageable with the axial end portion of the liner member.
Claim 2
Dependent Claim
157 words
An electric motor apparatus comprising a stator core having windings, a rotor, bearing support means rotatably supporting the rotor in a predetermined position relative to the stator, a thinwalled cylindrical liner of non-magnetic material disposed interiorly of said stator and extending axially beyond the axial end faces of the stator core thereby defining an alignment surface concentric with the rotor cavity of said stator and an axial abutment surface generally at substantially right angles to said rotor, said bearing support means being disposed at opposite axial ends of said liner and each bearing support means comprising a cup-shaped member attached at its outer end to the stator by means of a circumferentially extending bonding member, each of said cup-shaped members at its inner end supporting a rotor bearing means, each said cup-shaped member formed at its outer end with an abutment shoulder and a cylindrical alignment surface engageable with the axial end portion of the liner member.
Claim 3
Dependent Claim
29 words
An electric motor apparatus as claimed in claim 1, wherein the liner member is formed with an overlapping joint, and is secured to the wall of the stator bore.
Claim 4
Dependent Claim
32 words
An electric motor apparatus as claimed in claim 1, wherein the liner member has at least one longitudinal joint accommodated in a stator winding slot, said joint being a modified butt joint.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |