US3414970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing flat or surface commutator
Assignee: Denso Corp
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Filing: 1966-07-11
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Granted: 1968-12-10
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Expires: 1986-07-11
Abstract
No abstract record available.
Inventors
- 👤 Yamaguchi Terumoto
- 👤 Kawamoto Kisuo
- 👤 Amemiya Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
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: 2
Claim 1
Independent Claim
160 words
A METHOD FOR MANUFACTURING A FLAT OR SURFACE COMMUTATOR CHARACTERIZED BY FORMING A PORTION OF A CYLINDRICAL OR TUBULAR BLANK HAVING A SUITABLE OR APPROPRIATE WALL THICKNESS AND LENGTH INTO A DISK LIKE FLANGE LEAVING THE REMAINING PORTION OF SAID BLANK AS IT IS; EXTENDING THE REMAINING PORTION OF THE CYLINDRICAL OR TUBULAR BLANK IN THE AXIAL DIRECTION THEREOF BY PASSING A STEEL BALL THROUGH THE INNER PORTION THEREOF; THEN PROVIDING A PLURALITY OF SLOTS AROUND BOTH SAID CYLINDRICAL OR TUBULAR PORTION SAID THE OUTER PERIPHERY OF SAID DISK LINK FLANGE, EACH OF SAID SLOTS IN THE TUBULAR PORTION BEING ALIGNED WITH AND HAVING A CORRESPONDING SLOT IN THE FLANGE PORTION; BENDING THUS FORMED PROJECTIONS SO AS TO FORM PAWLS; MOLDING AN INSULATING MATERIAL AROUND THE REMAINING PORTION SO AS TO EMBED SAID PAWLS; AND SEPARATING EACH SEGMENT BY PROVIDING A GROOVE OR RECESS ALONG EACH OF THE CENTER LINES OF SAID CORRESPONDING SLOTS IN THE FLANGE AND TUBULAR PORTIONS.
Claim 2
Independent Claim
160 words
A METHOD FOR MANUFACTURING A FLAT OR SURFACE COMMUTATOR CHARACTERIZED BY FORMING A PORTION OF A CYLINDRICAL OR TUBULAR BLANK HAVING A SUITABLE OR APPROPRIATE WALL THICKNESS AND LENGTH INTO A DISK LIKE FLANGE LEAVING THE REMAINING PORTION OF SAID BLANK AS IT IS; EXTENDING THE REMAINING PORTION OF THE CYLINDRICAL OR TUBULAR BLANK IN THE AXIAL DIRECTION THEREOF BY PASSING A STEEL BALL THROUGH THE INNER PORTION THEREOF; THEN PROVIDING A PLURALITY OF SLOTS AROUND BOTH SAID CYLINDRICAL OR TUBULAR PORTION SAID THE OUTER PERIPHERY OF SAID DISK LINK FLANGE, EACH OF SAID SLOTS IN THE TUBULAR PORTION BEING ALIGNED WITH AND HAVING A CORRESPONDING SLOT IN THE FLANGE PORTION; BENDING THUS FORMED PROJECTIONS SO AS TO FORM PAWLS; MOLDING AN INSULATING MATERIAL AROUND THE REMAINING PORTION SO AS TO EMBED SAID PAWLS; AND SEPARATING EACH SEGMENT BY PROVIDING A GROOVE OR RECESS ALONG EACH OF THE CENTER LINES OF SAID CORRESPONDING SLOTS IN THE FLANGE AND TUBULAR PORTIONS.
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |