Patent US3290527A successfully refreshed from Google Patents.
US3290527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator, particularly for electrical machines
Assignee: Siemens Schuckertwerke AG
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Filing: 1964-10-14
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Granted: 1966-12-06
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Expires: 1984-10-14
Abstract
No abstract record available.
Inventors
- 👤 Habermann Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:15
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/04; H01R43/00; H01R43/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A COMMUTATOR COMPRISING A HUB MEMBER, A CIRCULAR GROUP OF COMMUTATOR LAMINATIONS SURROUNDING SAID HUB MEMBER AND HAVING PERIPHERALLY SEQUENTIAL LAMINATIONS EXTENDING SUBSTANTIALLY IN RESPECTIVE RADIAL PLANES, SAID GROUP OF LAMINATIONS HAVING TWO COAXIAL ANNULAR RECESSES IN AXIALLY OPPOSITE SIDES RESPECTIVELY, AN INTERMEDIATE INSULATION OF CASTING RESIN BETWEEN SAID GROUP OF LAMINATIONS AND SAID HUB MEMBER, AND TWO TIE RINGS FORMED OF WOUND GLASS FIBER STRANDS AND IMPREGNATED WITH HARD-
Claim 2
Dependent Claim
70 words
A COMMUTATOR COMPRISING A HUB MEMBER, A CIRCULAR GROUP OF COMMUTATOR LAMINATIONS SURROUNDING SAID HUB MEMBER AND HAVING PERIPHERALLY SEQUENTIAL LAMINATIONS EXTENDING SUBSTANTIALLY IN RESPECTIVE RADIAL PLANES, SAID GROUP OF LAMINATIONS HAVING TWO COAXIAL ANNULAR RECESSES IN AXIALLY OPPOSITE SIDES RESPECTIVELY, AN INTERMEDIATE INSULATION OF CASTING RESIN BETWEEN SAID GROUP OF LAMINATIONS AND SAID HUB MEMBER, AND TWO TIE RINGS FORMED OF WOUND GLASS FIBER STRANDS AND IMPREGNATED WITH HARD-
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |