US3845340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine rotor
Assignee: Ford Motor Co
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Filing: 1973-04-30
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Granted: 1974-10-29
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Expires: 1993-04-30
Abstract
Abstract A dynamoelectric machine rotor comprised of a plurality of paired lamina structures is disclosed. Each pair is comprised of first and second lamina members and has an even plurality of radially directed finger segments alternate ones of which are arranged to have radially and axially extending flux gathering portions. The members of each pair are arranged so that when a plurality of pairs are arranged in nesting relationship along an armature shaft, the axial core of the composite structure will be substantially solid while the radially and axially directed flux gathering portions will be in overlapping abutting relationship.
Inventors
- 👤 K Brooks
- 👤 A Dave
- 👤 T Kothari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:30
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
A laminated rotor or armature core for a dynamoelectric machine comprising in combination: a plurality of nesting lamina members, each having a plurality of radially directed finger elements; and a plurality of flux gathering portions, having both a radial and an axial extent, connected to axially alternate ones of the radially directed fingers the plurality of lamina members comprising: a plurality of first lamina members having a central segment and a plurality of radially directed finger elements, each of said first lamina finger elements terminating in a flux gathering portion; said flux gathering portions being angularly displaced with respect to the plane of the central segment and radially directed finger elements; and a plurality of substantially planar second lamina members having a central core and a plurality of radially directed finger elements, each of said second lamina members interposed between a pair of first lamina members.
Claim 2
Dependent Claim
146 words
A laminated rotor or armature core for a dynamoelectric machine comprising in combination: a plurality of nesting lamina members, each having a plurality of radially directed finger elements; and a plurality of flux gathering portions, having both a radial and an axial extent, connected to axially alternate ones of the radially directed fingers the plurality of lamina members comprising: a plurality of first lamina members having a central segment and a plurality of radially directed finger elements, each of said first lamina finger elements terminating in a flux gathering portion; said flux gathering portions being angularly displaced with respect to the plane of the central segment and radially directed finger elements; and a plurality of substantially planar second lamina members having a central core and a plurality of radially directed finger elements, each of said second lamina members interposed between a pair of first lamina members.
Claim 3
Dependent Claim
59 words
The laminated core of claim 1 wherein the flux gathering portions of the first lamina members are arranged at an angle with respect to the plane of the central segment determined by the formula Alpha arc cos ti/ti t2 where ti is the thickness of a first lamina member and t2 is the thickness of a second lamina member.
Claim 4
Dependent Claim
76 words
The laminated core of claim 1 wherein the core comprises: first and second substantially identical laminated core sections; said laminated sections comprising a plurality of first and second lamina members alternatingly arranged with second lamina members intermediate first lamina members; said first and second laminated sections being coaxially positioned with a first lamina member of each section in abutting relation and having the flux gathering portions of each section directed axially away from the other section.
Claim 5
Dependent Claim
126 words
A laminated rotor or armature core for a dynamoelectric machine comprising in combination: a plurality of nesting lamina members, each having a plurality of radially directed finger elements; and a plurality of flux gathering portions, having both a radial and an axial extent, connected to axially alternate ones of the radially directed fingers the plurality of lamina members comprising: a plurality of substantially identical lamina members having an even number of radially directed finger elements circumferentially alternating ones of which terminate in a flux gathering portion; and adjacent ones of the lamina members being rotated by an amount so that a flux gathering portion of a first lamina is adjacent a finger element of a second lamina which does not terminate in a flux gathering portion.
Claim 6
Dependent Claim
126 words
A laminated rotor or armature core for a dynamoelectric machine comprising in combination: a plurality of nesting lamina members, each having a plurality of radially directed finger elements; and a plurality of flux gathering portions, having both a radial and an axial extent, connected to axially alternate ones of the radially directed fingers the plurality of lamina members comprising: a plurality of substantially identical lamina members having an even number of radially directed finger elements circumferentially alternating ones of which terminate in a flux gathering portion; and adjacent ones of the lamina members being rotated by an amount so that a flux gathering portion of a first lamina is adjacent a finger element of a second lamina which does not terminate in a flux gathering portion.
Claim 7
Dependent Claim
32 words
The laminated core of claim 4 wherein the flux gathering portions of the lamina members are arranged at an angle with respect to the plane of the central segment of about 60*.
Claim 8
Dependent Claim
53 words
The laminated core of claim 4 wherein the core comprises: first and second substantially identical laminated sections; said laminated sections each comprising a plurality of lamina members; said first and second laminated sections coaxially arranged so that the flux gathering portions of each laminated section are directed away from the other laminated section.
Claim 9
Dependent Claim
36 words
The laminated core of claim 6 wherein the central segment of a lamina member of the first laminated section is in abutting contact with the central segment of a lamina member of the second laminated section.
Claim 10
Dependent Claim
26 words
The laminated core of claim 7 wherein the flux gathering portions of the abutting lamina of the first and second laminated sections are radially substantially aligned.
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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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |