Patent US3163244A successfully refreshed from Google Patents.
US3163244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill bit having non-aligned cutting members
Assignee: Ingersoll Rand Co
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Filing: 1961-05-19
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Granted: 1964-12-29
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Expires: 1981-05-19
Abstract
No abstract record available.
Inventors
- 👤 Robert D Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:00
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A ROCK DRILL BIT COMPRISING A BODY PORTION, A PLURALITY OF WINGS EXTENDING AXIALLY AND LATERALLY THEREFROM, EACH WING HAVING AN OPEN GROOVE FORMED IN ITS END AND HAVING A BOTTOMING FACE AND A SINGLE SIDE FACE, ONE PAIR OF SAID WINGS BEING ARRANGED WITH THEIR GROOVES IN ALIGNMENT WITH EACH OTHER AND THE OTHER PAIR OF SAID WINGS BEING ARRANGED WITH THEIR GROOVES OFF-SET AND PARALLEL WITH RESPECT TO EACH OTHER AND PERPENDICULAR TO THE FIRST SAID PAIR OF WINGS, AND A HARD METAL INSERT SECURED IN EACH SUCH GROOVE, EACH INSERT HAVING A CUTTING EDGE FORWARDLY EXTENDING WITH RESPECT TO THE BODY PORTION AND AN EXPOSED LATERAL END AND A BARE SIDE FACE, THE INSERTS IN SAID ALIGNED GROOVES BEING LONGER THAN THE INSERTS IN SAID OFF-SET GROOVES.
Claim 2
Dependent Claim
130 words
A ROCK DRILL BIT COMPRISING A BODY PORTION, A PLURALITY OF WINGS EXTENDING AXIALLY AND LATERALLY THEREFROM, EACH WING HAVING AN OPEN GROOVE FORMED IN ITS END AND HAVING A BOTTOMING FACE AND A SINGLE SIDE FACE, ONE PAIR OF SAID WINGS BEING ARRANGED WITH THEIR GROOVES IN ALIGNMENT WITH EACH OTHER AND THE OTHER PAIR OF SAID WINGS BEING ARRANGED WITH THEIR GROOVES OFF-SET AND PARALLEL WITH RESPECT TO EACH OTHER AND PERPENDICULAR TO THE FIRST SAID PAIR OF WINGS, AND A HARD METAL INSERT SECURED IN EACH SUCH GROOVE, EACH INSERT HAVING A CUTTING EDGE FORWARDLY EXTENDING WITH RESPECT TO THE BODY PORTION AND AN EXPOSED LATERAL END AND A BARE SIDE FACE, THE INSERTS IN SAID ALIGNED GROOVES BEING LONGER THAN THE INSERTS IN SAID OFF-SET GROOVES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-29 | 1968-06-29 | 1968-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-29 | 1972-06-29 | 1972-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-29 | 1976-06-29 | 1976-12-29 | $7700.00 | Window Closed / Lapsed |