Patent US3555936A successfully refreshed from Google Patents.
US3555936A
Expired / Lapsed
US
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Chip breakers
Assignee: Individual
•
Filing: 1969-05-21
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Granted: 1971-01-19
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Expires: 1989-05-21
Abstract
Abstract A CHIP BREAKER FOR DRILLING OPERATIONS WHEREIN THE CONTACT BETWEEN THE DRILL AND THE WORK PIECE IS MAINTAINED BY A SUB-BASE AND A SUPERIMPOSED TABLE WHICH ARE HELD SLIGHTLY APART BY HYDRAULIC PRESSURE. INTERMITTENT RELEASE OF THE PRESSURE ALLOWS THE BASE AND THE TABLE TO COME TOGETHER, THEREBY MOMENTARILY INTERRUPTING THE CUTTING ACTION OF THE DRILL AND BREAKING THE CHIP.
Inventors
- 👤 William G Burge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:54
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/34; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/564
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |