Patent US3342531A successfully refreshed from Google Patents.
US3342531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conical cutter bits held by resilient retainer for free rotation
Assignee: Cincinnati Mine Machinery Co
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Filing: 1965-02-16
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Granted: 1967-09-19
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Expires: 1985-02-16
Abstract
No abstract record available.
Inventors
- 👤 Claude B Krekeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:45
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/184; E21C35/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A MINING MACHINE, A BIT COMPRISING A HEAD MEANS, SAID HEAD MEANS HAVING A HARD CUTTING POINT AND BEING SUBSTANTIALLY CONICAL IN SHAPE, LUG MEANS FOR MOVING SAID HEAD MEANS IN A CUTTING DIRECTION AGAINST THE FACE OF A MINERAL TO BE CUT, MEANS FOR CONNECTING SAID HEAD MEANS AND SAID LUG MEANS, A RESILIENT RETAINER PROVIDING A SNAPON, PRY-OFF CONNECTION BETWEEN AT LEAST TWO OF SAID MEANS, SAID HEAD MEANS BEING MAINTAINED IN A POSITION IN WHICH ITS AXIS LIES AT AN ANGLE OF LESS THAN 90* TO THE DIRECTION OF SAID MOTION, THE RELATIONSHIP OF SAID HEAD MEANS AND SAID LUG MEANS WHEN CONNECTED BEING SUCH AS TO PERMIT FREE ROTATION OF SAID HEAD MEANS WITH RESPECT TO SAID LUG MEANS.
Claim 2
Dependent Claim
124 words
IN A MINING MACHINE, A BIT COMPRISING A HEAD MEANS, SAID HEAD MEANS HAVING A HARD CUTTING POINT AND BEING SUBSTANTIALLY CONICAL IN SHAPE, LUG MEANS FOR MOVING SAID HEAD MEANS IN A CUTTING DIRECTION AGAINST THE FACE OF A MINERAL TO BE CUT, MEANS FOR CONNECTING SAID HEAD MEANS AND SAID LUG MEANS, A RESILIENT RETAINER PROVIDING A SNAPON, PRY-OFF CONNECTION BETWEEN AT LEAST TWO OF SAID MEANS, SAID HEAD MEANS BEING MAINTAINED IN A POSITION IN WHICH ITS AXIS LIES AT AN ANGLE OF LESS THAN 90* TO THE DIRECTION OF SAID MOTION, THE RELATIONSHIP OF SAID HEAD MEANS AND SAID LUG MEANS WHEN CONNECTED BEING SUCH AS TO PERMIT FREE ROTATION OF SAID HEAD MEANS WITH RESPECT TO SAID LUG MEANS.
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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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |