US3290095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining machine with pivotally mounted and opposed elongated cutters
Assignee: Hughes Tool Co
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Filing: 1964-05-28
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Granted: 1966-12-06
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Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Raymond O Bredthaner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:40
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21D; E21D9/00; E21D9/10; E21D9/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A MINING OR TUNNELING MACHINE FOR REMOVING INCREMENTAL LAYERS OF ROCK FROM A WORKING FACE OF A TUNNEL OR THE LIKE, SAID MACHINE COMPRISING: (A) A MOBILE CARRIAGE, (B) MEANS FOR PROPELLING THE CARRIAGE ALONG THE TUNNEL AXIS INTO THE TUNNEL FACE, (C) A PAIR OF ELONGATED CUTTERS ROTATABLE ABOUT THEIR LONGITUDINAL AXES AND MOUNTED UPON THE FORWARD END OF THE CARRIAGE TO PIVOT ABOUT AXES SUBSTANTIALLY PARALLEL TO ONE ANOTHER AND TO THE TUNNEL AXIS, SAID ELONGATED CUTTERS BEING DISPOSED WITH THEIR LONGITUDINAL AXES TRANSVERSE THE TUNNEL AXIS AND BEING PROVIDED WITH PERIPHERAL CUTTING STRUCTURE OVER SUBSTANTIALLY THEIR FULL AXIAL LENGTHS, AND (D) DRIVE MEANS SUPPORTED BY THE CARRIAGE AND CONNECTED TO THE ELONGATED CUTTERS FOR ROTATING THEM ABOUT THEIR LONGITUDINAL AXES AND ALSO FOR PIVOTING THEM IN OPPOSITE DIRECTIONS ABOUT SAID SUBSTANTIALLY PARALLEL AXES WHICH ARE PARALLEL TO THE TUNNEL AXIS.
Claim 2
Dependent Claim
143 words
A MINING OR TUNNELING MACHINE FOR REMOVING INCREMENTAL LAYERS OF ROCK FROM A WORKING FACE OF A TUNNEL OR THE LIKE, SAID MACHINE COMPRISING: (A) A MOBILE CARRIAGE, (B) MEANS FOR PROPELLING THE CARRIAGE ALONG THE TUNNEL AXIS INTO THE TUNNEL FACE, (C) A PAIR OF ELONGATED CUTTERS ROTATABLE ABOUT THEIR LONGITUDINAL AXES AND MOUNTED UPON THE FORWARD END OF THE CARRIAGE TO PIVOT ABOUT AXES SUBSTANTIALLY PARALLEL TO ONE ANOTHER AND TO THE TUNNEL AXIS, SAID ELONGATED CUTTERS BEING DISPOSED WITH THEIR LONGITUDINAL AXES TRANSVERSE THE TUNNEL AXIS AND BEING PROVIDED WITH PERIPHERAL CUTTING STRUCTURE OVER SUBSTANTIALLY THEIR FULL AXIAL LENGTHS, AND (D) DRIVE MEANS SUPPORTED BY THE CARRIAGE AND CONNECTED TO THE ELONGATED CUTTERS FOR ROTATING THEM ABOUT THEIR LONGITUDINAL AXES AND ALSO FOR PIVOTING THEM IN OPPOSITE DIRECTIONS ABOUT SAID SUBSTANTIALLY PARALLEL AXES WHICH ARE PARALLEL TO THE TUNNEL AXIS.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |