US3879088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longwall mining system
Assignee: Individual
•
Filing: 1973-09-13
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Granted: 1975-04-22
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Expires: 1993-09-13
Abstract
Abstract A longwall mining device adapted to mine a mineral face in a mine comprising: A LOWER FRAME; AT LEAST ONE SET OF DRIVEN TRACKS MOUNTED ON SAID LOWER FRAME AND ADAPTED TO BE DRIVEN ALONG THE FLOOR OF THE MINE; AN UPPER FRAME; AT LEAST ONE SET OF DRIVEN TRACKS MOUNTED ON SAID UPPER FRAME AND ADAPTED TO BE DRIVEN ALONG THE ROOF OF THE MINE; JACK MEANS DISPOSED BETWEEN SAID UPPER AND LOWER FRAMES AND ADAPTED TO RAISE THE UPPER FRAME AGAINST THE ROOF OF THE MINE AND MAINTAIN CONTACT BETWEEN THE UPPER FRAME AND THE ROOF OF THE MINE; A CUTTING DEVICE ADAPTED TO BE DRIVEN THROUGH THE MINERAL IN SAID MINERAL FACE; MEANS FOR DRIVING SAID CUTTING DEVICE ACROSS THE FRONT OF SAID LONGWALL MINING DEVICE IN SAID MINERAL FACE THEREBY MINING SAID MINERAL; AND CONVEYOR MEANS DISPOSED ACROSS THE FRONT OF SAID DEVICE ADAPTED TO COLLECT THE MINED MINERAL AND CONVEY THE SAME AWAY FROM THE MINERAL FACE.
Inventors
- 👤 Jr George Sodder
- 👤 Samuel Eugene Fish
- 👤 Oliver Ellsworth Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:22
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/22; E21C29/00; E21C29/22; E21C29/24; E21C29/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
158 words
A longwall mining device comprising: a lower frame; at least one set of power driven tracks, on said lower frame, for advancing said frame along the floor of a mine in a forward direction; an upper frame; adjustable jack means supporting said upper frame on said lower frame and adapted to raise said upper frame substantially vertically toward the roof of the mine; a top frame mounted on said upper frame for forward and rearward horizontal movement thereon, said top frame having at least one set of power driven tracks thereon engageable with the roof of the mine and operable to advance said top frame forwardly along said upper frame while in engagement with the roof of the mine; guide means carried by and extending laterally across the front of said lower frame and a mineral cutting device movable along said guide means; and conveyor means carried by and extending laterally across the front of said lower frame.
Claim 2
Dependent Claim
158 words
A longwall mining device comprising: a lower frame; at least one set of power driven tracks, on said lower frame, for advancing said frame along the floor of a mine in a forward direction; an upper frame; adjustable jack means supporting said upper frame on said lower frame and adapted to raise said upper frame substantially vertically toward the roof of the mine; a top frame mounted on said upper frame for forward and rearward horizontal movement thereon, said top frame having at least one set of power driven tracks thereon engageable with the roof of the mine and operable to advance said top frame forwardly along said upper frame while in engagement with the roof of the mine; guide means carried by and extending laterally across the front of said lower frame and a mineral cutting device movable along said guide means; and conveyor means carried by and extending laterally across the front of said lower frame.
Claim 3
Dependent Claim
158 words
A longwall mining device comprising: a lower frame; at least one set of power driven tracks, on said lower frame, for advancing said frame along the floor of a mine in a forward direction; an upper frame; adjustable jack means supporting said upper frame on said lower frame and adapted to raise said upper frame substantially vertically toward the roof of the mine; a top frame mounted on said upper frame for forward and rearward horizontal movement thereon, said top frame having at least one set of power driven tracks thereon engageable with the roof of the mine and operable to advance said top frame forwardly along said upper frame while in engagement with the roof of the mine; guide means carried by and extending laterally across the front of said lower frame and a mineral cutting device movable along said guide means; and conveyor means carried by and extending laterally across the front of said lower frame.
Claim 4
Dependent Claim
158 words
A longwall mining device comprising: a lower frame; at least one set of power driven tracks, on said lower frame, for advancing said frame along the floor of a mine in a forward direction; an upper frame; adjustable jack means supporting said upper frame on said lower frame and adapted to raise said upper frame substantially vertically toward the roof of the mine; a top frame mounted on said upper frame for forward and rearward horizontal movement thereon, said top frame having at least one set of power driven tracks thereon engageable with the roof of the mine and operable to advance said top frame forwardly along said upper frame while in engagement with the roof of the mine; guide means carried by and extending laterally across the front of said lower frame and a mineral cutting device movable along said guide means; and conveyor means carried by and extending laterally across the front of said lower frame.
Claim 5
Dependent Claim
26 words
A device as defined in claim 1 wherein said guide means is mounted on a sub frame mounted on said lower frame for vertical movement thereon.
Claim 6
Dependent Claim
29 words
A device as defined in claim 2 wherein opposite ends of said guide means are independently vertically movable on said lower frame whereby said guide means may be tilted.
Claim 7
Dependent Claim
24 words
A device as defined in claim 2 wherein said guide means are mounted on said lower frame for tilting about an axis longitudinally thereof.
Claim 8
Dependent Claim
29 words
A device as defined in claim 1 wherein said guide means includes an elongated rack bar extending therealong for engagement by a drive gear on said mineral cutting device.
Claim 9
Dependent Claim
20 words
A device as defined in claim 2 including hydraulic means for moving said guide means vertically on said lower frame.
Claim 10
Dependent Claim
32 words
A device as defined in claim 1 wherein said mineral cutting device comprises a carriage movable along said guide means and a cutter member mounted on said carriage for vertical movement thereon.
Claim 11
Dependent Claim
30 words
A device as defined in claim 1 wherein said upper frame is provided with guide slots therein, said top frame having rollers journalled thereon and extending into said guide slots.
Claim 12
Dependent Claim
53 words
A device as defined in claim 1 wherein said guide means comprises a generally L-shaped frame member having a vertical leg and a forwardly extending horizontal leg, said conveyor means being carried by said horizontal leg, said horizontal leg terminating in a forwardly and downwardly sloping plate for directing material onto said conveyor.
Claim 13
Dependent Claim
25 words
A device as defined in claim 9 including an arm member on said cutting device for pushing material up said sloping plate onto said conveyor.
Claim 14
Dependent Claim
35 words
A device as defined in claim 10 wherein said arm member is mounted on said cutting device for swinging movement over said plate in response to movement of said cutting device along said guide means.
Claim 15
Dependent Claim
54 words
A mining device as defined in claim 1 wherein at least a second upper frame and jack means is provided on said lower frame, and a second top frame is movably carried by said second top frame and having power driven tracks thereon, the tracks of said top frames being independently and separately drivable.
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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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |