US3304815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: Sandvik AB
•
Filing: 1964-12-11
•
Granted: 1967-02-21
•
Expires: 1984-12-11
Abstract
No abstract record available.
Inventors
- 👤 Faber Kurt Heinrich Albe Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:46
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0486; B23B51/06; B23B51/063; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A DRILL FOR CHIP CUTTING DRILLING OF A METAL WORKPIECE COMPRISING A TUBULAR SHAFT HAVING AN INNER AND AN OUTER WALL WITH A SPACE THEREBETWEEN, CUTTING EDGES ON THE FRONT END OF SAID SHAFT, AT LEAST ONE OF SAID CUTTING EDGES EXTENDING LATERALLY BEYOND THE OUTER SURFACE OF SAID TUBULAR SHAFT, MEANS FOR DELIVERING FLUSHING MEDIUM TO SAID SPACE, A FIRST APERTURE HAVING ITS OUTLET AT THE OUTER SURFACE OF SAID OUTER WALL REARWARDLY OF SAID CUTTING EDGES FOR DELIVERING A FORWARDLY DIRECTED FIRST FLOW OF FLUSHING MEDIUM FROM SAID SPACE TO SAID CUTTING EDGES, A PASSAGEWAY PERMITTING RETURN FLOW OF FLUSHING MEDIUM FROM SAID CUTTING EDGES TO THE CAVITY WITHIN SAID INNER WALL
Claim 2
Dependent Claim
114 words
A DRILL FOR CHIP CUTTING DRILLING OF A METAL WORKPIECE COMPRISING A TUBULAR SHAFT HAVING AN INNER AND AN OUTER WALL WITH A SPACE THEREBETWEEN, CUTTING EDGES ON THE FRONT END OF SAID SHAFT, AT LEAST ONE OF SAID CUTTING EDGES EXTENDING LATERALLY BEYOND THE OUTER SURFACE OF SAID TUBULAR SHAFT, MEANS FOR DELIVERING FLUSHING MEDIUM TO SAID SPACE, A FIRST APERTURE HAVING ITS OUTLET AT THE OUTER SURFACE OF SAID OUTER WALL REARWARDLY OF SAID CUTTING EDGES FOR DELIVERING A FORWARDLY DIRECTED FIRST FLOW OF FLUSHING MEDIUM FROM SAID SPACE TO SAID CUTTING EDGES, A PASSAGEWAY PERMITTING RETURN FLOW OF FLUSHING MEDIUM FROM SAID CUTTING EDGES TO THE CAVITY WITHIN SAID INNER WALL
References Cited (Backward Citations)
US1281420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |