US3840983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of a dynamoelectric machine laminated armature structure
Assignee: Ford Motor Co
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Filing: 1973-04-30
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Granted: 1974-10-15
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Expires: 1993-04-30
Abstract
Abstract A method of manufacture of a dynamoelectric machine laminated armature structure is disclosed wherein the lamina are compressively formed into a unitary structure by use of a ram and a suitably contoured die. The die provides that the finished diameter of the rotary structure will have closely controlled dimensions while the lamina themselves may be formed with relatively wide dimensional variations. By compressively confining the individual lamina under a pressure high enough to obtain some metal flowing, a unitary armature structure is provided.
Inventors
- 👤 A Ryff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:19
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/26; H02K15/00; H02K15/02; H02K15/021; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49012; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
The method of assemblying the flux producing core of a dynamoelectric machine armature having an axis of rotation and a generally cylindrical flux gathering surface concentric thereabout comprising the steps of: forming a plurality of substantially identical nestable lamina members; arranging a predetermined number of said lamina members in nesting relation within a die, said lamina members having flux gathering portions for defining the flux gathering surface, said flux gathering portions arranged to be substantially in contact with the side walls of the die, inserting a ram member within the die, applying compressive pressure to the ram and die members whereby the nesting stack of lamina member is compressively confined within the die forming a composite end assembly, and arranging two substantially identical end assemblies in back to back abutting relationship.
Claim 2
Independent Claim
131 words
The method of assemblying the flux producing core of a dynamoelectric machine armature having an axis of rotation and a generally cylindrical flux gathering surface concentric thereabout comprising the steps of: forming a plurality of substantially identical nestable lamina members; arranging a predetermined number of said lamina members in nesting relation within a die, said lamina members having flux gathering portions for defining the flux gathering surface, said flux gathering portions arranged to be substantially in contact with the side walls of the die, inserting a ram member within the die, applying compressive pressure to the ram and die members whereby the nesting stack of lamina member is compressively confined within the die forming a composite end assembly, and arranging two substantially identical end assemblies in back to back abutting relationship.
Claim 3
Dependent Claim
55 words
The method of claim 1 wherein the step of forming the plurality of nestable lamina members comprises the steps of: forming a plurality of substantially planar lamina members each having a plurality of radially directed finger elements, and providing each of the finger elements with an axially directed angular bend of between 90* to 180*.
Claim 4
Dependent Claim
39 words
The method of claim 2 wherein the step of forming a plurality of planar lamina members comprises the steps of: forming a plurality of substantially circular lamina blanks, and forming the desired lamina member configuration from said lamina blanks.
Claim 5
Dependent Claim
83 words
The method of claim 1 wherein the step of forming a plurality of nestable lamina members comprises: stamping a plurality of lamina members, each having the desired lamina configuration, from a ribbon of ferrous material, said Lamina configuration including a central segment and a plurality of generally radially directed finger elements, and concomitently providing each lamina member radially directed finger element with an axially directed angularity of between 90* and 180* intermediate the end thereof and the central segment of the lamina member.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |