US4456846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator assembly
Assignee: General Electric Co
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Filing: 1982-12-29
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Granted: 1984-06-26
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Expires: 2002-12-29
Abstract
Abstract The external segments of a commutator for rotating electrical machinery are mechanically interlocked to a molded matrix by a plurality of tang assemblies having protrusions at their ends for engagement deep within the internal matrix, to hold the segments against centrifugal forces. The tang assemblies also have anchoring bars shaped for interlocking engagement with the longitudinal channels located on the inner surfaces of the segments.
Inventors
- 👤 Vijay K. Stokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:27
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/06; H01R43/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A commutator for rotating electrical machinery, comprising: a plurality of conductive segments having inner and outer surfaces, said segments being circumferentially arranged in a spaced-apart relationship about an axis so that their outer surfaces form an overall structure of cylindrical shape as the outer surface of the commutator, each of said segments having a longitudinal channel therein opening on its inner surface; a tang assembly associated with each of said segments, respectively, each said tang assembly having an anchoring bar shaped for interlocking engagement with one of the longitudinal segment channels, and each said bar having a plurality of tangs depending therefrom toward the axis; and a non-conducting matrix molded within said structure around the tangs and between the segments.
Claim 2
Dependent Claim
120 words
A commutator for rotating electrical machinery, comprising: a plurality of conductive segments having inner and outer surfaces, said segments being circumferentially arranged in a spaced-apart relationship about an axis so that their outer surfaces form an overall structure of cylindrical shape as the outer surface of the commutator, each of said segments having a longitudinal channel therein opening on its inner surface; a tang assembly associated with each of said segments, respectively, each said tang assembly having an anchoring bar shaped for interlocking engagement with one of the longitudinal segment channels, and each said bar having a plurality of tangs depending therefrom toward the axis; and a non-conducting matrix molded within said structure around the tangs and between the segments.
Claim 3
Dependent Claim
24 words
The invention of claim 1 wherein each of said tangs, respectively, includes at least one protrusion thereon for improved mechanical engagement with the matrix.
Claim 4
Dependent Claim
19 words
The invention of claim 1 wherein the matrix in the spaces between the segments comprises an insulating paste material.
References Cited (Backward Citations)
US2492657A
Cited
GB665116A
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US2602988A
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US2963774A
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FR1223885A
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US3864821A
Cited
US3987539A
Cited
US3958326A
Cited
FR2504318A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |