Patent US3121352A successfully refreshed from Google Patents.
US3121352A
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Tooth forming method and apparatus
Assignee: Michigan Tool Co
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Filing: 1961-05-18
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Granted: 1964-02-18
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Expires: 1981-05-18
Abstract
No abstract record available.
Inventors
- 👤 Willard B Mccardell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:47
CPC Classifications
B; B21; B21H; B21H5/00; B21H5/02; B21H5/027; B21K; B21K1/00; B21K1/28; B21K1/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49462; Y10T29/49467
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
IN AN APPARATUS FOR FORMING EXTERNAL TEETH ON A CYLINDRICAL WORKPIECE, AN ANNULAR CAGE, FIRST AND SECOND AXIAL EXTENSIONS ON OPPOSITE SIDES OF SAID CAGE, THE OUTER DIAMETERS OF SAID EXTENSIONS BEING SMALLER THAN THE INNER DIAMETER OF THE MAIN CAGE PORTION, A PLURALITY OF CIRCUMFERENTIALLY SPACED RADIALLY EXTENDING SLOTS IN SAID CAGE, SAID SLOTS HAVING PARALLEL SIDE WALLS AND EXTENDING AXIALLY BETWEEN SAID CAGE EXTENSIONS, A PLURALITY OF TOOTH FORMING BLADES SLIDABLY MOUNTED IN SAID SLOTS, THE INNER ENDS OF SAID BLADES BEING DISPOSED WITHIN SAID CAGE AND HAVING SHAPES COMPLEMENTARY TO THE INTERDENTAL SPACES TO BE FORMED ON THE WORKPIECE, THE OUTER ENDS OF SAID BLADES EXTENDING OUTWARDLY FROM THE CAGE, AND MEANS FOR GRADUALLY FORCING SUCCESSIVE BLADES RADIALLY INWARDLY AGAINST A WORKPIECE CENTRALLY DISPOSED WITHIN SAID CAGE.
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) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |