US3260319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit and locking means
Assignee: Timken Co
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Filing: 1964-06-11
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Granted: 1966-07-12
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Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert E Conover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:53
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/627; E21B10/633; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A CLUSTER BIT COMPRISING A BIT HOLDER HAVING A PLURALITY OF SOCKETS IN THE WORKING FACE THEREOF, A PLURALITY OF INSERT BITS HAVING CUTTING EDGES AND HAVING SHANKS POSITIONED IN SAID SOCKETS, SAID SHANKS BEING PROVIDED WITH NOTCHES IN THE PERIPHERY THEREOF, SAID BIT HOLDER HAVING A FIRST TRANSVERSE PASSAGE THEREIN ALIGNED WITH THE INSERT BIT SHANK NOTCHES, SAID PASSAGE ENGAGING EACH OF SAID SOCKETS, SAID BIT HOLDER HAVING A SECOND TRANSVERSE PASSAGE INTERSECTING SAID FIRST TRANSVERSE PASSAGE, A FIRST LOCKING PIN POSITIONED IN SAID FIRST PASSAGE AND ENGAGING SAID INSERT BIT SHANK NOTCHES TO RESTRAIN ALL OF SAID INSERT BITS FROM ROTATING IN THE HOLDER DURING DRILLING, SAID FIRST LOCKING PIN HAVING MEANS FOR RECEIVING A SECOND LOCK PIN IN INTERLOCKING ENGAGEMENT, A SECOND LOCK PIN POSITIONED IN SAID SECOND PASSAGE AND ENGAGING SAID FIRST PIN TO LOCK SAID FIRST PIN TO SAID BIT HOLDER, AND MEANS RETAINING THE SECOND LOCK PIN IN SAID HOLDER IN INTERLOCKING ENGAGEMENT WITH THE FIRST LOCKING PIN.
Claim 2
Dependent Claim
164 words
A CLUSTER BIT COMPRISING A BIT HOLDER HAVING A PLURALITY OF SOCKETS IN THE WORKING FACE THEREOF, A PLURALITY OF INSERT BITS HAVING CUTTING EDGES AND HAVING SHANKS POSITIONED IN SAID SOCKETS, SAID SHANKS BEING PROVIDED WITH NOTCHES IN THE PERIPHERY THEREOF, SAID BIT HOLDER HAVING A FIRST TRANSVERSE PASSAGE THEREIN ALIGNED WITH THE INSERT BIT SHANK NOTCHES, SAID PASSAGE ENGAGING EACH OF SAID SOCKETS, SAID BIT HOLDER HAVING A SECOND TRANSVERSE PASSAGE INTERSECTING SAID FIRST TRANSVERSE PASSAGE, A FIRST LOCKING PIN POSITIONED IN SAID FIRST PASSAGE AND ENGAGING SAID INSERT BIT SHANK NOTCHES TO RESTRAIN ALL OF SAID INSERT BITS FROM ROTATING IN THE HOLDER DURING DRILLING, SAID FIRST LOCKING PIN HAVING MEANS FOR RECEIVING A SECOND LOCK PIN IN INTERLOCKING ENGAGEMENT, A SECOND LOCK PIN POSITIONED IN SAID SECOND PASSAGE AND ENGAGING SAID FIRST PIN TO LOCK SAID FIRST PIN TO SAID BIT HOLDER, AND MEANS RETAINING THE SECOND LOCK PIN IN SAID HOLDER IN INTERLOCKING ENGAGEMENT WITH THE FIRST LOCKING PIN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |