Patent US3227013A successfully refreshed from Google Patents.
US3227013A
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Trepanning tools
Assignee: Individual
•
Filing: 1963-10-24
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Granted: 1966-01-04
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Expires: 1983-10-24
Abstract
No abstract record available.
Inventors
- 👤 Zimmermann Lukas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:54
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0426; Y; Y10; Y10S; Y10S408/00; Y10S408/703; Y10T; Y10T408/00; Y10T408/89; Y10T408/895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A CUTTING TOOL FOR PERFORMING TREPANNING CUTS IN A WORK PIECE COMPRISING A SHANK AND AN AXIALLY BIFURCATED HEAD PROVIDING A PAIR OF CUTTING ELEMENTS, SAID CUTTING ELEMENTS BEING FORMED ON CIRCULAR HELICAL CURVES CONCENTRIC WITH THE AXIS OF THE SHANK, EACH CUTTING ELEMENT HAVING A CUTTIN TOOTH WITH THE FACE THEREOF DISPOSED IN THE DIRECTION OF CUTTING ROTATION OF SAID CUTTING TOOL, ONE CUTTING ELEMENT BEING FORMED TO CUT THE OUTER PORTION OF THE TREPANNING CUT, THE OTHER CUTTING ELEMENT BEING FORMED TO CUT THE INNER PORTION OF THE TREPANNING CUT, AND THE AXIAL ENDS OF SAID CUTTING ELEMENT BEING FORMED TO CUT THE BOTTOM OF THE SAID TREPANNING CUT, THE CUTTING EDGES OF BOTH TEETH BEING LOCATED IN A COMMON PLATE PARALLEL TO THE AXIS OF THE TOOL SHANK BUT SPACED THEREFROM A DISTANCE SUFFICIENT TO PROVIDE RADIAL CUTTING CLEARANCE FOR BOTH SAID CUTTING ELEMENTS IN RESPECT TO THE WORK PIECE.
Claim 2
Dependent Claim
153 words
A CUTTING TOOL FOR PERFORMING TREPANNING CUTS IN A WORK PIECE COMPRISING A SHANK AND AN AXIALLY BIFURCATED HEAD PROVIDING A PAIR OF CUTTING ELEMENTS, SAID CUTTING ELEMENTS BEING FORMED ON CIRCULAR HELICAL CURVES CONCENTRIC WITH THE AXIS OF THE SHANK, EACH CUTTING ELEMENT HAVING A CUTTIN TOOTH WITH THE FACE THEREOF DISPOSED IN THE DIRECTION OF CUTTING ROTATION OF SAID CUTTING TOOL, ONE CUTTING ELEMENT BEING FORMED TO CUT THE OUTER PORTION OF THE TREPANNING CUT, THE OTHER CUTTING ELEMENT BEING FORMED TO CUT THE INNER PORTION OF THE TREPANNING CUT, AND THE AXIAL ENDS OF SAID CUTTING ELEMENT BEING FORMED TO CUT THE BOTTOM OF THE SAID TREPANNING CUT, THE CUTTING EDGES OF BOTH TEETH BEING LOCATED IN A COMMON PLATE PARALLEL TO THE AXIS OF THE TOOL SHANK BUT SPACED THEREFROM A DISTANCE SUFFICIENT TO PROVIDE RADIAL CUTTING CLEARANCE FOR BOTH SAID CUTTING ELEMENTS IN RESPECT TO THE WORK PIECE.
References Cited (Backward Citations)
US3086410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |