US3243924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond drill bit
Assignee: Wheel Trueing Tool Co
•
Filing: 1964-01-06
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Granted: 1966-04-05
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Expires: 1984-01-06
Abstract
No abstract record available.
Inventors
- 👤 Peters Edward Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:22
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/89; Y10T408/895
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A COMPOSITE ROTARY TUBULAR ABRASIVE DRILL BIT HAVING ONE END ADAPTED FOR CONNECTION TO A SOURCE OF POWER AND HAVING A FREE WORKING END, SAID BIT COMPRISING A HOLLOW CYLINDRICAL SHANK OF SUBSTANTIALLY UNIFORM WALL THICKNESS THROUGHOUT ITS LENGTH, SAID SHANK AFFORDING A THROUGH PASSAGE FOR A LIQUID COOLANT DURING DRILLING, AND AN ABRASIVE ANNULUS SECURED TO THE FREE END OF SAID SHANK, SAID ANNULUS IN CROSS-SECTION HAVING AN INNER POLYGONAL SHAPE OF A MINIMUM TRANSVERSE DIMENSION LESS THAN THE INNER DIAMETER OF SAID SHANK AND OF A MAXIMUM TRANSVERSE DIMENSION EQUAL TO SAID SHANK INNER DIAMETER, THEREBY PROVIDING AXIALLY EXTENDING COOLANT FLOW PASSAGES BETWEEN SAID ANNULUS INNER SURFACE AND THE MATERIAL BEING DRILLED, SAID ANNULUS IN CROSS-SECTION HAVING AN OUTER REGULAR GEOMETRICAL SHAPE SELECTED FROM THE GROUPS CONSISTING OF POLYGONS AND CIRCLES EACH HAVING A MAXIMUM OUTER TRANSVERSE DIMENSION GREATER THAN THE OUTSIDE DIAMETER OF SAID SHANK.
Claim 2
Dependent Claim
148 words
A COMPOSITE ROTARY TUBULAR ABRASIVE DRILL BIT HAVING ONE END ADAPTED FOR CONNECTION TO A SOURCE OF POWER AND HAVING A FREE WORKING END, SAID BIT COMPRISING A HOLLOW CYLINDRICAL SHANK OF SUBSTANTIALLY UNIFORM WALL THICKNESS THROUGHOUT ITS LENGTH, SAID SHANK AFFORDING A THROUGH PASSAGE FOR A LIQUID COOLANT DURING DRILLING, AND AN ABRASIVE ANNULUS SECURED TO THE FREE END OF SAID SHANK, SAID ANNULUS IN CROSS-SECTION HAVING AN INNER POLYGONAL SHAPE OF A MINIMUM TRANSVERSE DIMENSION LESS THAN THE INNER DIAMETER OF SAID SHANK AND OF A MAXIMUM TRANSVERSE DIMENSION EQUAL TO SAID SHANK INNER DIAMETER, THEREBY PROVIDING AXIALLY EXTENDING COOLANT FLOW PASSAGES BETWEEN SAID ANNULUS INNER SURFACE AND THE MATERIAL BEING DRILLED, SAID ANNULUS IN CROSS-SECTION HAVING AN OUTER REGULAR GEOMETRICAL SHAPE SELECTED FROM THE GROUPS CONSISTING OF POLYGONS AND CIRCLES EACH HAVING A MAXIMUM OUTER TRANSVERSE DIMENSION GREATER THAN THE OUTSIDE DIAMETER OF SAID SHANK.
References Cited (Backward Citations)
US1600054A
Cited
US3153885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |