Patent US3241405A successfully refreshed from Google Patents.
US3241405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countersink tool
Assignee: Individual
•
Filing: 1965-01-08
•
Granted: 1966-03-22
•
Expires: 1985-01-08
Abstract
No abstract record available.
Inventors
- 👤 John H Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:47
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/104; Y; Y10; Y10T; Y10T407/00; Y10T407/10; Y10T408/00; Y10T408/55; Y10T408/564
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A COUNTERSINKING TOOL COMPRISING: A BODY WHEREIN THERE IS JOURNALED A ROTOR TO BE DRIVEN BY A SOURCE OF ROTARY POWER; A DEPTH GUIDE FIXED TO SAID BODY AND HAVING A FREE END FORMED IN A CHISEL-BEVEL BY TWO PLANES INTERSECTING IN A LINE PERPENDICULAR TO THE AXIS OF SAID DEPTH GUIDE, SAID PLANES SLOPING AT AN ANGLE $ EACH SIDE OF A PLANE PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID DEPTH GUIDE; A HEAD PORTION JOURNALED WITHIN SAID DEPTH GUIDE; RESILIENT BIAS MEANS BETWEEN SAID HEAD PORTION AND SAID ROTOR FOR MAINTAINING SAID HEAD PORTION AND SAID ROTOR IN RECIPROCABLE SPACED RELATION; DRIVING MEANS CONNECTING SAID HEAD AND ROTOR; AND A ROTATABLE COUNTERSINK CUTTER DIPOSED RADIALLY INWARDLY OF SAID DEPTH GUIDE AND HAVING A PLURALITY OF CUTTING EDGES AND CAPPED BY A PILOT SHANK HAVING AN ARCUATE EDGE PROFILE, OF SUCH SHAPE THAT A TANGENT TO SAID EDGE PROFILE AT THE INTERSECTION OF SAID PROFILE WIT SAID CUTTER EDGES FORMS AN ANGLE WITH A LINE PARALLEL TO SAID GUIDE AXIS WHICH IS GREATER THAN SAID ANGLE $.
Claim 2
Dependent Claim
178 words
A COUNTERSINKING TOOL COMPRISING: A BODY WHEREIN THERE IS JOURNALED A ROTOR TO BE DRIVEN BY A SOURCE OF ROTARY POWER; A DEPTH GUIDE FIXED TO SAID BODY AND HAVING A FREE END FORMED IN A CHISEL-BEVEL BY TWO PLANES INTERSECTING IN A LINE PERPENDICULAR TO THE AXIS OF SAID DEPTH GUIDE, SAID PLANES SLOPING AT AN ANGLE $ EACH SIDE OF A PLANE PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID DEPTH GUIDE; A HEAD PORTION JOURNALED WITHIN SAID DEPTH GUIDE; RESILIENT BIAS MEANS BETWEEN SAID HEAD PORTION AND SAID ROTOR FOR MAINTAINING SAID HEAD PORTION AND SAID ROTOR IN RECIPROCABLE SPACED RELATION; DRIVING MEANS CONNECTING SAID HEAD AND ROTOR; AND A ROTATABLE COUNTERSINK CUTTER DIPOSED RADIALLY INWARDLY OF SAID DEPTH GUIDE AND HAVING A PLURALITY OF CUTTING EDGES AND CAPPED BY A PILOT SHANK HAVING AN ARCUATE EDGE PROFILE, OF SUCH SHAPE THAT A TANGENT TO SAID EDGE PROFILE AT THE INTERSECTION OF SAID PROFILE WIT SAID CUTTER EDGES FORMS AN ANGLE WITH A LINE PARALLEL TO SAID GUIDE AXIS WHICH IS GREATER THAN SAID ANGLE $.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |