US3279060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chisel bits
Assignee: Canadian Ingersoll Rand Co Ltd
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Filing: 1964-09-01
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Granted: 1966-10-18
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Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Douglas L G Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/45; B26D1/455; B26F; B26F3/00; B26F3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A CHISEL BIT COMPRISING: A SHANK; A HEAD DISPOSED AT ONE END OF SAID SHANK; SAID HEAD HAVING A TIP PORTION AT ONE END AND A HEEL PORTION AT THE JUNCTURE OF SAID SHANK AND THE HEAD; SAID HEAD INCLUDING A SUBSTANTIALLY FLAT BASE OF GENERALLY TRIANGULAR SHAPE HAVING ITS APEX AT THE TIP, ITS BASE AT THE HEEL AND SIDE EDGES EXTENDING FROM THE APEX TO THE TRIANGULAR BASE, AND A PAIR OF UPPER SIDE SURFACES; SAID PAIR OF UPPER SIDE SURFACES BEING GRADUALLY INCLINED UPWARDLY AND REARWARDLY FROM SAID TIP TOWARD SAID JUNCTURE AND UPWARDLY AND INWARDLY FROM SAID SIDE EDGES TOWARD SAID JUNCTURE TO FORM TWO WEDGING SURFACES FOR FORCING SEVERED MATERIAL UPWARDLY AND OUTWARDLY FROM SAID BIT.
Claim 2
Dependent Claim
121 words
A CHISEL BIT COMPRISING: A SHANK; A HEAD DISPOSED AT ONE END OF SAID SHANK; SAID HEAD HAVING A TIP PORTION AT ONE END AND A HEEL PORTION AT THE JUNCTURE OF SAID SHANK AND THE HEAD; SAID HEAD INCLUDING A SUBSTANTIALLY FLAT BASE OF GENERALLY TRIANGULAR SHAPE HAVING ITS APEX AT THE TIP, ITS BASE AT THE HEEL AND SIDE EDGES EXTENDING FROM THE APEX TO THE TRIANGULAR BASE, AND A PAIR OF UPPER SIDE SURFACES; SAID PAIR OF UPPER SIDE SURFACES BEING GRADUALLY INCLINED UPWARDLY AND REARWARDLY FROM SAID TIP TOWARD SAID JUNCTURE AND UPWARDLY AND INWARDLY FROM SAID SIDE EDGES TOWARD SAID JUNCTURE TO FORM TWO WEDGING SURFACES FOR FORCING SEVERED MATERIAL UPWARDLY AND OUTWARDLY FROM SAID BIT.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |