Patent US4883764A successfully refreshed from Google Patents.
Patent US3829720A successfully refreshed from Google Patents.
US3829720A
Expired / Lapsed
US
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Motor stator
Assignee: Dynamics Corp of America
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Filing: 1973-01-26
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Granted: 1974-08-13
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Expires: 1993-01-26
Abstract
Abstract A laminated motor stator for an electric motor is provided with plastic molded-in-place end shrouds and selected electrically insulated surfaces along with interconnecting structural elements holding the laminations of the stator together as a unit and providing selected electrically insulated surfaces and a smooth rounded support for the field coil windings with a calculated yield to reduce tension on the inner winding turns by the outer winding turns. A method of forming the unified and insulated stator is also disclosed in which winding tension on the field turns is reduced and the coils are supported and held firmly in place.
Inventors
- 👤 R Swanke
- 👤 R Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K3/00; H02K3/46; H02K3/52; H02K3/521; H02K3/522; H02K2203/00; H02K2203/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
295 words
A stator for a dynamo-electric machine comprising: a. a paramagnetic field core structure of stacked laminated sheet metal layers having aligned holes and arcuate lobed poles inwardly defining a cylindrical surface of revolution larger than a rotor to be received between them and each pole defining internal longitudinal recesses along its sides interconnecting its ends; b. an integral dielectric cover structure of resilient thermoplastic material capable of an elastic memory molded in intimate interface engagement as a unitized assembly with integral elements extending through the holes and intimately interlocking with the irregularities and intertices thereof whereby said laminates are unified and rigidified and said coil structure is supportable therein in insulated relationship from said sheet metal layers and with the walls of said recesses and said pole ends to hold the laminations and shrouds in integrally assembled relationship to provide structural strength to said stator; c. said cover structure including integral shroud members of said material having annular configurations extending longitudinally from opposite ends of each pole with at least the end portions of two of the shrouds diametrically opposite each other having inner surfaces radially outwardly a substantial distance from said cylindrical surface of revolution to receive in insulating supported relationship field coil turns under tension through the recesses and around the ends of the poles; d. a field coil received on the shrouds of each pole in which the turns of the field coils under their winding tension reposition at least said end portions of said two shrouds within said space outside said cylindrical surface of revolution to permit axial movement of a rotor therebetween, and store an elastic memory in the shrouds opposing said tension with the tension less on the inner turns than the tension on the outer and exposed turns.
Claim 2
Dependent Claim
295 words
A stator for a dynamo-electric machine comprising: a. a paramagnetic field core structure of stacked laminated sheet metal layers having aligned holes and arcuate lobed poles inwardly defining a cylindrical surface of revolution larger than a rotor to be received between them and each pole defining internal longitudinal recesses along its sides interconnecting its ends; b. an integral dielectric cover structure of resilient thermoplastic material capable of an elastic memory molded in intimate interface engagement as a unitized assembly with integral elements extending through the holes and intimately interlocking with the irregularities and intertices thereof whereby said laminates are unified and rigidified and said coil structure is supportable therein in insulated relationship from said sheet metal layers and with the walls of said recesses and said pole ends to hold the laminations and shrouds in integrally assembled relationship to provide structural strength to said stator; c. said cover structure including integral shroud members of said material having annular configurations extending longitudinally from opposite ends of each pole with at least the end portions of two of the shrouds diametrically opposite each other having inner surfaces radially outwardly a substantial distance from said cylindrical surface of revolution to receive in insulating supported relationship field coil turns under tension through the recesses and around the ends of the poles; d. a field coil received on the shrouds of each pole in which the turns of the field coils under their winding tension reposition at least said end portions of said two shrouds within said space outside said cylindrical surface of revolution to permit axial movement of a rotor therebetween, and store an elastic memory in the shrouds opposing said tension with the tension less on the inner turns than the tension on the outer and exposed turns.
Claim 3
Dependent Claim
41 words
A stator in accordance with claim 1 in which: a. said shroud members have integral arcuate transverse outer reinforcing shoulders ar their extended ends supporting the curvature of said shroud members at their ends to dispose said coil windings in place.
Claim 4
Dependent Claim
85 words
A stator in accordance with claim 1 in which: said cover structure elements and opposing arcuate shrouds conforming to the annular configuration of said pole ends at each end of said stator to receive in limited resilient supporting relationship the inner returning loops of said coil structure said pair of opposing arcuate shrouds provided at each end of said core structure presenting rounded surfaces of less width than the poles to resiliently engage in a radial direction said outer returning loops of said coil structure.
Claim 5
Dependent Claim
45 words
A stator in accordance with claim 1 in which: a. said aligned holes are located at the base of the poles; and b. said integral elements through said bore holes and said field coils cooperating to hold the laminations and shrouds in integrally assembled relationship.
Claim 6
Dependent Claim
195 words
A stator for a dynamo-electric machine comprising: a. an annular paramagnetic field core structure adapted to receive a rotor therein; b. said field core structure having a plurality of laminated sheet metal layers with internal recesses defining pole members and supporting surfaces adapted to receive field coil windings and having aligned bore holes in assembled condition; c. a cover of insulating rigid, thermoplastic material molded in intimate interengagement with the interior and portions of the exterior of said field structure and having supporting end layers; d. said cover including integral elements extending through said bore holes and through said recesses to join said end layers in unitary assembled relationship; e. a pair of annular shroud members integral with said cover of plastic material and extending between said recesses outwardly from said end layers at each end of said field structure, said shrouds having transverse outer reinforcing shoulders at their extended ends; and f. said shroud members being adapted to receive and support coil windings extending through said recesses and passing over the outer arcuate surfaces of one of said shroud members at each end of said stator and thereby being retained by said transverse shoulders.
Claim 7
Dependent Claim
195 words
A stator for a dynamo-electric machine comprising: a. an annular paramagnetic field core structure adapted to receive a rotor therein; b. said field core structure having a plurality of laminated sheet metal layers with internal recesses defining pole members and supporting surfaces adapted to receive field coil windings and having aligned bore holes in assembled condition; c. a cover of insulating rigid, thermoplastic material molded in intimate interengagement with the interior and portions of the exterior of said field structure and having supporting end layers; d. said cover including integral elements extending through said bore holes and through said recesses to join said end layers in unitary assembled relationship; e. a pair of annular shroud members integral with said cover of plastic material and extending between said recesses outwardly from said end layers at each end of said field structure, said shrouds having transverse outer reinforcing shoulders at their extended ends; and f. said shroud members being adapted to receive and support coil windings extending through said recesses and passing over the outer arcuate surfaces of one of said shroud members at each end of said stator and thereby being retained by said transverse shoulders.
Claim 8
Dependent Claim
36 words
A stator in accordance with claim 5 including: a. a field coil wound about associated shroud members at opposite ends of said field structure said shrouds supporting the field coil thereon to receive the rotor therepast.
Claim 9
Dependent Claim
22 words
The combination called for in claim 6 in which said shrouds are depressed by and resiliently support the coil windings in place.
Claim 10
Dependent Claim
26 words
The combination called for in claim 7 in which tension on the inner windings of the coils is less than that maintained on the outer windings.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |