US3117637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit
Assignee: Individual
•
Filing: 1960-12-14
•
Granted: 1964-01-14
•
Expires: 1980-12-14
Abstract
No abstract record available.
Inventors
- 👤 Mortensen Louis Aackersberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:34
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/44; E21B10/445; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A DRILL COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY PORTION, A GROOVE EXTENDING INWARDLY FROM ONE END OF SAID BODY PORTION AND DEFINING ON EACH SIDE THEREOF SPACED BRANCH PORTIONS INTEGRAL WITH SAID BODY PORTION, A SUBSTANTIALLY RECTANGULAR CUTTING PLATE DISPOSED IN SAID GROOVE BETWEEN SAID BRANCH PORTIONS, SAID CUTTING PLATE BEING WIDER THAN THE DIAMETER OF SAID CYLINDRICAL BODY PORTION AND HAVING SIDE EDGES AND A BOTTOM PORTION WITH TWO ADJOINING CUTTING EDGES DEFINED THEREON, SAID BRANCH PORTIONS BEING ANGLED EDGEWISE IN OPPOSITE RADIAL DIRECTIONS TO FORM SUPPORTS FOR THE LATERALLY EXTENDING PARTS OF SAID CUTTING PLATE, A HELICAL WIRE WOUND ON SAID BODY PORTION AND HAVING A DIAMETRICAL SUBSTANTIALLY HORIZONTAL PORTION EXTENDING THROUGH SAID BODY PORTION ADJACENT SAID GROOVE, SAID WIRE HAVING COIL PORTIONS EXTENDING UPWARDLY FROM EACH SIDE OF SAID BODY FROM SAID HORIZONTAL PORTION WITH ADJACENT CONVOLUTIONS OF SAID COIL PORTIONS SPACED AXIALLY.
Claim 2
Dependent Claim
145 words
A DRILL COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY PORTION, A GROOVE EXTENDING INWARDLY FROM ONE END OF SAID BODY PORTION AND DEFINING ON EACH SIDE THEREOF SPACED BRANCH PORTIONS INTEGRAL WITH SAID BODY PORTION, A SUBSTANTIALLY RECTANGULAR CUTTING PLATE DISPOSED IN SAID GROOVE BETWEEN SAID BRANCH PORTIONS, SAID CUTTING PLATE BEING WIDER THAN THE DIAMETER OF SAID CYLINDRICAL BODY PORTION AND HAVING SIDE EDGES AND A BOTTOM PORTION WITH TWO ADJOINING CUTTING EDGES DEFINED THEREON, SAID BRANCH PORTIONS BEING ANGLED EDGEWISE IN OPPOSITE RADIAL DIRECTIONS TO FORM SUPPORTS FOR THE LATERALLY EXTENDING PARTS OF SAID CUTTING PLATE, A HELICAL WIRE WOUND ON SAID BODY PORTION AND HAVING A DIAMETRICAL SUBSTANTIALLY HORIZONTAL PORTION EXTENDING THROUGH SAID BODY PORTION ADJACENT SAID GROOVE, SAID WIRE HAVING COIL PORTIONS EXTENDING UPWARDLY FROM EACH SIDE OF SAID BODY FROM SAID HORIZONTAL PORTION WITH ADJACENT CONVOLUTIONS OF SAID COIL PORTIONS SPACED AXIALLY.
References Cited (Backward Citations)
GB345922A
Cited
GB423647A
Cited
US2425132A
Cited
US2565333A
Cited
US2673714A
Cited
GB736423A
Cited
FR1118255A
Cited
US2817983A
Cited
GB836034A
Cited
US3032129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |