US3075593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit
Assignee: Timken Co
•
Filing: 1959-11-18
•
Granted: 1963-01-29
•
Expires: 1979-11-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Holsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:50
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/627; E21B10/633
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A DRILL BIT COMPRISING A DRILL BIT HOLDER PROVIDED WITH A PLURALITY OF OPEN ENDED TAPERED SOCKETS, A PLURALITY OF CUTTING BITS COMPRISING HEAD PORTIONS HAVING A PLURALITY OF EQUALLY SPACED SLOTS THEREIN, AND TAPERED SHANK PORTIONS TERMINATING IN BUTT ENDS CONSTRUCTED AND ARRANGED TO ENGAGE THE TAPERED SOCKETS IN THE BIT HOLDER THEREBY FORMING THE ONLY CONTACT BETWEEN SAID BITS AND SAID HOLDER, AND CUTTER INSERTS RETAINED IN THE SLOTS OF THE BITS, THE OUTER PERIPHERAL EDGES OF THE CUTTER INSERTS DEFINING THE GAUGE DIAMETER OF A CUTTING AREA, SAID BITS BEING CONSTRUCTED AND ARRANGED TO TIGHTEN THE CONNECTION BETWEEN THE SHANKS AND THE SOCKETS DURING DRILLING, SAID BITS BEING ROTATABLE WHEN DISENGAGED FROM THE SOCKETS TO PRESENT NEW DISTINCT CUTTING EDGES TO THE GAUGE DIAMETER OF THE CUTTING AREA BEFORE BEING REGROUND, SAID NUMBER OF NEW CUTTING EDGES CORRESPONDING TO THE NUMBER OF SLOTS AND INSERTS OF THE CUTTING BITS.
Claim 2
Dependent Claim
152 words
A DRILL BIT COMPRISING A DRILL BIT HOLDER PROVIDED WITH A PLURALITY OF OPEN ENDED TAPERED SOCKETS, A PLURALITY OF CUTTING BITS COMPRISING HEAD PORTIONS HAVING A PLURALITY OF EQUALLY SPACED SLOTS THEREIN, AND TAPERED SHANK PORTIONS TERMINATING IN BUTT ENDS CONSTRUCTED AND ARRANGED TO ENGAGE THE TAPERED SOCKETS IN THE BIT HOLDER THEREBY FORMING THE ONLY CONTACT BETWEEN SAID BITS AND SAID HOLDER, AND CUTTER INSERTS RETAINED IN THE SLOTS OF THE BITS, THE OUTER PERIPHERAL EDGES OF THE CUTTER INSERTS DEFINING THE GAUGE DIAMETER OF A CUTTING AREA, SAID BITS BEING CONSTRUCTED AND ARRANGED TO TIGHTEN THE CONNECTION BETWEEN THE SHANKS AND THE SOCKETS DURING DRILLING, SAID BITS BEING ROTATABLE WHEN DISENGAGED FROM THE SOCKETS TO PRESENT NEW DISTINCT CUTTING EDGES TO THE GAUGE DIAMETER OF THE CUTTING AREA BEFORE BEING REGROUND, SAID NUMBER OF NEW CUTTING EDGES CORRESPONDING TO THE NUMBER OF SLOTS AND INSERTS OF THE CUTTING BITS.
References Cited (Backward Citations)
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US884150A
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US907360A
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US1589596A
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Cited
US2955810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |