Patent US3827141A successfully refreshed from Google Patents.
US3827141A
Expired / Lapsed
US
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Method of manufacturing an electric rotary machine
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1973-04-19
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Granted: 1974-08-06
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Expires: 1993-04-19
Abstract
Abstract The invention relates to electric rotary machines. It provides an electric rotary machine with a stator structure the stator teeth of which are shaped as separate elements and are bonded to the stator ring and the stator windings into a rigid assembly.
Inventors
- 👤 S Hallerback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
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; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
A method for manufacturing an electric rotary machine comprising a rotor and a stator core consisting of a plurality of circumferentially spaced radially directed teeth defining stator slots, a thin walled tubular element of non-magnetic material disposed interiorly of the teeth, windings in the stator slots and a moulding securing the tubular member, windings and stator teeth to provide a rigidly assembled stator unit consisting of the steps of forming the teeth from a a plurality of laminations, said teeth having substantially their final dimension, supporting the stator teeth so that the stator slots open radially outwardly, positioning the tubular member interiorly of the teeth so that it extends axially outwardly beyond the end faces of the stator core to provide aligning and abutment means for supporting the rotor within the stator, inserting the windings in the stator slots, applying a curable moulding compound to secure the teeth and stator windings as an integral assembly, assembling the rotor in the stator so that it is positioned by the aligning and abutment means.
Claim 2
Independent Claim
172 words
A method for manufacturing an electric rotary machine comprising a rotor and a stator core consisting of a plurality of circumferentially spaced radially directed teeth defining stator slots, a thin walled tubular element of non-magnetic material disposed interiorly of the teeth, windings in the stator slots and a moulding securing the tubular member, windings and stator teeth to provide a rigidly assembled stator unit consisting of the steps of forming the teeth from a a plurality of laminations, said teeth having substantially their final dimension, supporting the stator teeth so that the stator slots open radially outwardly, positioning the tubular member interiorly of the teeth so that it extends axially outwardly beyond the end faces of the stator core to provide aligning and abutment means for supporting the rotor within the stator, inserting the windings in the stator slots, applying a curable moulding compound to secure the teeth and stator windings as an integral assembly, assembling the rotor in the stator so that it is positioned by the aligning and abutment means.
Claim 3
Dependent Claim
53 words
A method as claimed in claim 1 wherein the teeth are formed from flux oriented laminations and have a flank profile flared to define shoulders at their inner radial ends that are spaced apart a small distance whereby in the assembled stator optimum magnetic flux flow radially through the stator teeth is obtained.
Claim 4
Dependent Claim
23 words
A method as claimed in claim 1 including the step of assembling a stator ring adjacent the outer periphery of said stator teeth.
Claim 5
Dependent Claim
31 words
A method according to claim 1, wherein the thin-walled tubular member is supported by a mandrel during the insertion of the stator windings and the application of the curable molding compound.
Claim 6
Dependent Claim
21 words
A method according to claim 1, wherein the teeth of the stator core are subjected to a heat treatment before assembly.
Claim 7
Dependent Claim
19 words
A method according to claim 5, wherein the heat treatment is carried out at a temperature of about 800*C.
References Cited (Backward Citations)
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Cited
US2354551A
Cited
US2607816A
Cited
US2695969A
Cited
US2792511A
Cited
US3194993A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |