US4160182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated core manufacture
Assignee: Mitsui Manufacturing Co Ltd
•
Filing: 1977-07-27
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Granted: 1979-07-03
•
Expires: 1997-07-27
Abstract
Abstract A dynamoelectric device having a wound core provided with a plurality of circumferentially spaced, radially opening slots disposed in an annular array. Windings are provided in the slots and an annular slot closure formed of magnetic material having a plurality of through openings is disposed coaxially of the annular array of slots with the through openings being disposed centrally of the open end of the slots. The slot closure is formed of magnetic material and is defined by a stacked assembly of interlocked, coaxial annular laminations. The interlocking structure may include a pair of apposed fingers at opposite sides of the through opening. The fingers may be offset from the lamination to define a recess with the fingers of one lamination being disposed in interlocking fitted association with the recess of the adjacent lamination in the stacked core assembly. The openings and interlocking fingers may be stamped from the lamination.
Inventors
- 👤 Yoshiaki Mitsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:28
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/487; H02K3/493; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24281; Y10T428/24289
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
82 words
In a dynamoelectric device having a wound core provided with a plurality of circumferentially spaced, radially opening slots disposed in an annular array, and windings in said slots, the improvement comprising an annular slot closure coaxial of said annular array, said slot closure being formed of magnetic material and having a plurality of through openings disposed one each centrally of the open end of said slots and having an extent transversely to the slots substantially less than the width of the slots.
Claim 2
Dependent Claim
82 words
In a dynamoelectric device having a wound core provided with a plurality of circumferentially spaced, radially opening slots disposed in an annular array, and windings in said slots, the improvement comprising an annular slot closure coaxial of said annular array, said slot closure being formed of magnetic material and having a plurality of through openings disposed one each centrally of the open end of said slots and having an extent transversely to the slots substantially less than the width of the slots.
Claim 3
Dependent Claim
19 words
The dynamoelectric device of claim 1 wherein said slot closure comprises a stacked assembly of interlocked coaxial annular laminations.
Claim 4
Dependent Claim
19 words
The dynamoelectric device of claim 1 wherein said wound core comprises a stacked assembly of interlocked coaxial annular laminations.
Claim 5
Dependent Claim
19 words
The dynamoelectric device of claim 1 wherein said through openings extend parallel to the axis of the slot array.
Claim 6
Dependent Claim
30 words
The dynamoelectric device of claim 1 wherein said slot closure comprises a stacked assembly of coaxial annular laminations having cooperating interlocking means, said interlocking means further defining said through openings.
Claim 7
Dependent Claim
12 words
The dynamoelectric device of claim 1 wherein said through openings are circular.
Claim 8
Dependent Claim
29 words
The dynamoelectric device of claim 1 wherein said through openings are circular and have a diameter substantially less than the corresponding circumferential transverse extent of the slot open end.
Claim 9
Dependent Claim
25 words
The dynamoelectric device of claim 1 wherein said through openings have a radial extent substantially less than the radial extent of said annular slot closure.
Claim 10
Dependent Claim
34 words
The dynamoelectric device of claim 1 wherein said slot closure comprises a stacked assembly of coaxial annular laminations having a pair of interlocking means disposed one each at opposite sides of said through opening.
Claim 11
Dependent Claim
34 words
The dynamoelectric device of claim 1 wherein said slot closure comprises a stacked assembly of coaxial annular laminations having a pair of interlocking projections disposed one each at opposite sides of said through opening.
Claim 12
Dependent Claim
16 words
The dynamoelectric device of claim 1 wherein said through openings are provided with an insulating filler.
Claim 13
Dependent Claim
89 words
In a dynamoelectric core assembly having a plurality of stacked laminations, improved means for interlocking said laminations comprising: a through opening in each of the laminations; and a pair of apposed fingers at opposite sides of the opening, said fingers being cantilevered from the laminations to define a recess, the fingers of the laminations being offset from the laminations to be disposed in interlocking fitted association with the recess of the adjacent laminations in the stacked core assembly and with the openings in the adjacent laminations in overlying relationship.
Claim 14
Dependent Claim
89 words
In a dynamoelectric core assembly having a plurality of stacked laminations, improved means for interlocking said laminations comprising: a through opening in each of the laminations; and a pair of apposed fingers at opposite sides of the opening, said fingers being cantilevered from the laminations to define a recess, the fingers of the laminations being offset from the laminations to be disposed in interlocking fitted association with the recess of the adjacent laminations in the stacked core assembly and with the openings in the adjacent laminations in overlying relationship.
Claim 15
Dependent Claim
14 words
The dynamoelectric core assembly of claim 12 wherein said fingers are mirror image similar.
Claim 16
Dependent Claim
18 words
The dynamoelectric core assembly of claim 12 wherein the distal end of said fingers define said through opening.
Claim 17
Dependent Claim
40 words
The dynamoelectric core assembly of claim 12 wherein said fingers include a connecting portion extending at an angle to the transverse extent of the laminations, and a distal end portion extending substantially parallel to said transverse extent of the laminations.
Claim 18
Dependent Claim
68 words
The dynamoelectric core assembly of claim 12 wherein said fingers include a connecting portion extending at an angle to the transverse extent of the laminations, and a distal end portion extending substantially parallel to said transverse extent of the laminations, said end portion being displaced from the laminations substantially the thickness of the lamination whereby the recess has a depth substantially equal to the thickness of the lamination.
Claim 19
Dependent Claim
16 words
The dynamoelectric core assembly of claim 12 wherein the distal ends of said fingers are concave.
Claim 20
Dependent Claim
16 words
The dynamoelectric core assembly of claim 12 wherein the distal ends of said fingers are rounded.
Claim 21
Dependent Claim
31 words
The dynamoelectric core assembly of claim 12 wherein said opening has a transverse extent perpendicular to the direction of extent of said fingers substantially greater than the width of the fingers.
Claim 22
Dependent Claim
33 words
The dynamoelectric core assembly of claim 12 wherein said opening is circular and has a diameter perpendicular to the direction of extent of said fingers substantially greater than the width of the fingers.
Claim 23
Dependent Claim
19 words
The dynamoelectric core assembly of claim 12 wherein said fingers and opening comprise a stamped portion of the lamination.
Claim 24
Dependent Claim
12 words
The dynamoelectric core assembly of claim 12 wherein said laminations are annular.
Claim 25
Dependent Claim
16 words
The dynamoelectric core assembly of claim 12 wherein said fingers are defined by arcuate side edges.
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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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |