Patent US3353871A successfully refreshed from Google Patents.
US3353871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous mining machine with oscillating rotary cutter heads
Assignee: Lee Norse Co
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Filing: 1964-08-05
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Granted: 1967-11-21
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Einar M Arentzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:21
CPC Classifications
E; E21; E21C; E21C31/00; E21C31/08; E21C27/00; E21C27/20; E21C27/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A MINING MACHINE COMPRISING A CHASSIS, A BOOM CONNECTED TO THE FORWARD END OF SAID CHASSIS FOR VERTICAL MOVEMENT RELATIVE TO SAID CHASSIS, A PAIR OF CARRIERS MOUNTED ON SAID BOOM FOR SIDE-BY-SIDE HORIZONTAL MOVEMENT, A ROTARY CUTTER CONNECTED TO THE FORWARD END OF EACH OF SAID CARRIERS, MOTOR MEANS CONNECTED TO SAID CUTTER FOR ROTATABLY DRIVING SAID CUTTERS, HYDRAULICALLY OPERATED MOTOR MEANS CONNECTED TO SAID BOOM AND TO EACH OF SAID CARRIER FOR HORIZONTALLY OSCILLATING SAID CARRIERS SIMULTANEOUSLY IN OPPOSITION TO ONE ANOTHER, AND MEANS FOR CAUSING SAID HYDRAULICALLY OPERATED MOTOR MEANS TO HORIZONTALLY OSCILLATE SAID CARRIERS CONTINUOUSLY DURING THE NORMAL OPERATION OF THE MINING MACHINE.
Claim 2
Dependent Claim
107 words
A MINING MACHINE COMPRISING A CHASSIS, A BOOM CONNECTED TO THE FORWARD END OF SAID CHASSIS FOR VERTICAL MOVEMENT RELATIVE TO SAID CHASSIS, A PAIR OF CARRIERS MOUNTED ON SAID BOOM FOR SIDE-BY-SIDE HORIZONTAL MOVEMENT, A ROTARY CUTTER CONNECTED TO THE FORWARD END OF EACH OF SAID CARRIERS, MOTOR MEANS CONNECTED TO SAID CUTTER FOR ROTATABLY DRIVING SAID CUTTERS, HYDRAULICALLY OPERATED MOTOR MEANS CONNECTED TO SAID BOOM AND TO EACH OF SAID CARRIER FOR HORIZONTALLY OSCILLATING SAID CARRIERS SIMULTANEOUSLY IN OPPOSITION TO ONE ANOTHER, AND MEANS FOR CAUSING SAID HYDRAULICALLY OPERATED MOTOR MEANS TO HORIZONTALLY OSCILLATE SAID CARRIERS CONTINUOUSLY DURING THE NORMAL OPERATION OF THE MINING MACHINE.
References Cited (Backward Citations)
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Cited
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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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |