Patent US770351A successfully refreshed from Google Patents.
US4477967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making the stator for electric motor
Assignee: Denso Corp
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Filing: 1983-08-23
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Granted: 1984-10-23
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Expires: 2003-08-23
Abstract
Abstract A conductor of a rectangular cross-section is overlapped with an insulator having a greater width than the width of the conductor and wound to form a coil assembly. The oversized portions of the insulator are folded and cemented together. The coil assembly is mounted on a stator pole core so that the folded insulator portions are respectively adjacent to the pole piece of the core and to the inner wall of a cylindrical yoke when the pole core is secured to the yoke. The folded portions of the insulator are depressed by an amount sufficient to allow the coil assembly to be firmly clamped in position.
Inventors
- 👤 Susumu Yabuoshi
- 👤 Shogo Uzura
- 👤 Nobuyuki Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:41
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/325; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A method for making a pole of an electric motor, the stator comprising a cylindrical yoke and a pole core adapted to be secured to said yoke and having a pole piece which is curved in conformance to the curvature of the inner wall of said yoke, comprising the steps of: (a) placing a sheet of an insulator on one surface of a conductor having a rectangular cross-section, the width of said sheet being greater than the width of said conductor, and forming said conductor and insulator into a coil of several turns so that said insulator is positioned between successive turns of conductors; (b) folding all the oversized portions of said insulator of said turns; (c) cementing the folded portions together; (d) mounting said coil on said pole core; and (e) securing said pole core to said yoke so that said folded portions are held under pressure exerted thereto by the yoke and said pole piece.
Claim 2
Independent Claim
157 words
A method for making a pole of an electric motor, the stator comprising a cylindrical yoke and a pole core adapted to be secured to said yoke and having a pole piece which is curved in conformance to the curvature of the inner wall of said yoke, comprising the steps of: (a) placing a sheet of an insulator on one surface of a conductor having a rectangular cross-section, the width of said sheet being greater than the width of said conductor, and forming said conductor and insulator into a coil of several turns so that said insulator is positioned between successive turns of conductors; (b) folding all the oversized portions of said insulator of said turns; (c) cementing the folded portions together; (d) mounting said coil on said pole core; and (e) securing said pole core to said yoke so that said folded portions are held under pressure exerted thereto by the yoke and said pole piece.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1, wherein the step (b) comprises forming each of the oversized portions into a ledge and folding the ledge toward the coil.
Claim 4
Dependent Claim
20 words
A method as claimed in claim 1, wherein said insulator comprises a sheet of a partially cured thermosetting resinous material.
Claim 5
Dependent Claim
32 words
A method as claimed in claim 1, wherein said insulator sheet comprises a base formed of one of a cotton, nonwoven and synthetic cloth impregnated with a partially cured thermosetting resinous material.
Claim 6
Dependent Claim
15 words
A method as claimed in claim 1, wherein said insulator comprises a high polymer film.
Claim 7
Dependent Claim
20 words
A method as claimed in claim 2, 3, 4, or 5, wherein the step (c) comprises heating said oversized portions.
Claim 8
Dependent Claim
27 words
A method as claimed in claim 1, wherein the step (a) further comprises turning over the oversized portion of said insulator around the edge of said conductor.
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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |