US3302974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ripper type mining machine having oppositely moving oscillating ripper heads
Assignee: Westinghouse Air Brake Co
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Filing: 1966-02-18
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Granted: 1967-02-07
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Emil J Hlinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:05
CPC Classifications
E; E21; E21C; E21C31/00; E21C31/10; E21C27/00; E21C27/20; E21C27/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A MINING MACHINE COMPRISING, A MOBILE FRAME, A PAIR OF BOOM ARMS EXTENDING BEYOND THE FORWARD END OF SAID FRAME, MEANS MOUNTING SAID BOOM ARMS ON SAID FRAME FOR VERTICAL MOVEMENT RELATIVE TO SAID FRAME AND FOR HORIZONTAL TRANSVERSE OSCILLATING MOVEMENT RELATIVE TO ONE ANOTHER, CUTTER MEANS MOUNTED ON THE END OF EACH BOOM ARM AND ROTATABLE ABOUT A HORIZONTAL TRANSVERSE AXIS AND HAVING CUTTER BITS POSITIONED TO CUT IN EACH DIRECTION OF TRANSVERSE OSCILLATING MOVEMENT OF SAID BOOM ARMS, POWER MEANS FOR ROTATABLY DRIVING SAID CUTTER MEANS, SEPARATE POWER MEANS FOR OSCILLATING SAID BOOM ARMS, OTHER SEPARATE POWER MEANS FOR VERTICALLY MOVING AND BOOM ARMS, AND CONTROL MEANS FOR SAID SEPARATE POWER MEANS AND SAID OTHER SEPARATE POWER MEANS FOR VARYING THE RATE OF OSCILLATION OF THE BOOM ARMS AND THE RATE OF VERTICAL FEEDING MOVEMENT OF SAID BOOM ARMS INVERSELY RELATIVE TO ONE ANOTHER.
Claim 2
Dependent Claim
146 words
A MINING MACHINE COMPRISING, A MOBILE FRAME, A PAIR OF BOOM ARMS EXTENDING BEYOND THE FORWARD END OF SAID FRAME, MEANS MOUNTING SAID BOOM ARMS ON SAID FRAME FOR VERTICAL MOVEMENT RELATIVE TO SAID FRAME AND FOR HORIZONTAL TRANSVERSE OSCILLATING MOVEMENT RELATIVE TO ONE ANOTHER, CUTTER MEANS MOUNTED ON THE END OF EACH BOOM ARM AND ROTATABLE ABOUT A HORIZONTAL TRANSVERSE AXIS AND HAVING CUTTER BITS POSITIONED TO CUT IN EACH DIRECTION OF TRANSVERSE OSCILLATING MOVEMENT OF SAID BOOM ARMS, POWER MEANS FOR ROTATABLY DRIVING SAID CUTTER MEANS, SEPARATE POWER MEANS FOR OSCILLATING SAID BOOM ARMS, OTHER SEPARATE POWER MEANS FOR VERTICALLY MOVING AND BOOM ARMS, AND CONTROL MEANS FOR SAID SEPARATE POWER MEANS AND SAID OTHER SEPARATE POWER MEANS FOR VARYING THE RATE OF OSCILLATION OF THE BOOM ARMS AND THE RATE OF VERTICAL FEEDING MOVEMENT OF SAID BOOM ARMS INVERSELY RELATIVE TO ONE ANOTHER.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |