US3278237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine with slidable cutter bar extensions
Assignee: National Mine Service Co
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Filing: 1964-07-03
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Granted: 1966-10-11
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Expires: 1984-07-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Jerry Karlovsky
- 👤 John M Cookson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:11
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/10; E21C27/12; E21C27/124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A CONTINUOUS MINING MACHINE HAVING A GEAR CASE, ROTARY BORING BARS JOURNALED IN SAID GEAR CASE AND EXTENDING FORWARDLY THEREFROM AND PROVIDED WITH RADIAL CUTTER ARMS, UPPER AND LOWER CUTTER BARS MOUNTED ON SAID GEAR CASE AND EXTENDING TRANSVERSELY OF THE MACHINE BEHIND SAID RADIAL CUTTER ARMS, SAID LOWER CUTTER BAR INCLUDING A FORWARDLY OPENING GROOVE, A HORIZONTALLY ELONGATED SUPPORT MOUNTED IN SAID LOWER CUTTER BAR TO SLIDE HORIZONTALLY OF THE MACHINE AND AT THE REAR OF SAID GROOVE, A SPROCKET JOURNALED ON THE OUTER END OF SAID SUPPORT, A CUTTER CHAIN RECEIVED AND GUIDED IN SAID GROOVE AND PASSING OVER THE SPROCKET, AND A DEVICE MOUNTED ON THE MACHINE BEHIND SAID GROOVE AND SAID CHAIN AND OPERATIVELY CONNECTED TO SAID SUPPORT TO PROJECT AND RETRACT IT IN ITS MOUNTING.
Claim 2
Dependent Claim
131 words
IN A CONTINUOUS MINING MACHINE HAVING A GEAR CASE, ROTARY BORING BARS JOURNALED IN SAID GEAR CASE AND EXTENDING FORWARDLY THEREFROM AND PROVIDED WITH RADIAL CUTTER ARMS, UPPER AND LOWER CUTTER BARS MOUNTED ON SAID GEAR CASE AND EXTENDING TRANSVERSELY OF THE MACHINE BEHIND SAID RADIAL CUTTER ARMS, SAID LOWER CUTTER BAR INCLUDING A FORWARDLY OPENING GROOVE, A HORIZONTALLY ELONGATED SUPPORT MOUNTED IN SAID LOWER CUTTER BAR TO SLIDE HORIZONTALLY OF THE MACHINE AND AT THE REAR OF SAID GROOVE, A SPROCKET JOURNALED ON THE OUTER END OF SAID SUPPORT, A CUTTER CHAIN RECEIVED AND GUIDED IN SAID GROOVE AND PASSING OVER THE SPROCKET, AND A DEVICE MOUNTED ON THE MACHINE BEHIND SAID GROOVE AND SAID CHAIN AND OPERATIVELY CONNECTED TO SAID SUPPORT TO PROJECT AND RETRACT IT IN ITS MOUNTING.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |