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US3753595A
Expired / Lapsed
US
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Longwall mining machine overhanging face side of conveyor
Assignee: Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
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Filing: 1972-03-16
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Granted: 1973-08-21
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Expires: 1992-03-16
Abstract
Abstract A coal cutting machine extends across a conveyor that is spaced from the working face of a coal mine, and across most of the space between it and the working face. One side of the machine is supported on the side wall of the conveyor along its gobbing side. The opposite side of the machine is supported by a skid on the foot wall of the mine. Between the conveyor and the working face the machine houses a winch and drive motor, and a cutter head housing is connected to an end of the machine body in the same area and contains a horizontal axle that projects from the conveyor side of the housing. Mounted on this axle is the inner end of an arm that extends lengthwise of the machine away from the cutter housing. The outer end of the arm carries a roll cutter that extends laterally from it across the housing.
Inventors
- 👤 W Lanfermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:29
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
175 words
The combination with a conveyor adapted to rest on the foot wall of a coal mine parallel to the working face and spaced therefrom and having an upwardly extending side wall along its gobbing side, of a coal cutting machine comprising a body extending across the conveyor and having a portion projecting most of the way across the space between the conveyor and the working face, means supporting one side of said body on said conveyor side wall, a skid supporting the opposite side of said body on the foot wall and connected to the body, a winch and drive motor mounted in said projecting portion of the body, and a cutter head housing connected to an end of said projecting portion and containing a transverse horizontal axle projecting from the conveyor side of the housing, an arm mounted at its inner end on said axle and extending lengthwise of the machine away from said housing, and a roll cutter carried by the outer end of said arm and extending laterally therefrom across said housing.
Claim 2
Dependent Claim
175 words
The combination with a conveyor adapted to rest on the foot wall of a coal mine parallel to the working face and spaced therefrom and having an upwardly extending side wall along its gobbing side, of a coal cutting machine comprising a body extending across the conveyor and having a portion projecting most of the way across the space between the conveyor and the working face, means supporting one side of said body on said conveyor side wall, a skid supporting the opposite side of said body on the foot wall and connected to the body, a winch and drive motor mounted in said projecting portion of the body, and a cutter head housing connected to an end of said projecting portion and containing a transverse horizontal axle projecting from the conveyor side of the housing, an arm mounted at its inner end on said axle and extending lengthwise of the machine away from said housing, and a roll cutter carried by the outer end of said arm and extending laterally therefrom across said housing.
Claim 3
Dependent Claim
29 words
The combination recited in claim 1, including skids supported by said conveyOr side wall, and vertically adjustable means connecting the skids with said body for tilting the machine transversely.
Claim 4
Dependent Claim
16 words
The combination recited in claim 2, in which said vertically adjustable means include fluid pressure cylinders.
Claim 5
Dependent Claim
37 words
The combination recited in claim 1, including a base plate extending along the working face side of the conveyor and resting on the foot wall, and skid means connected to said body and slidable along said plate.
Claim 6
Dependent Claim
17 words
The combination recited in claim 1, including means for adjusting said skid vertically relative to said body.
Claim 7
Dependent Claim
17 words
The combination recited in claim 5, in which said vertically adjusting means includes a fluid pressure cylinder.
Claim 8
Dependent Claim
49 words
The combination recited in claim 6, including a toggle pivotally connected on a transverse axis to said skid and operated by said cylinder to raise and lower the skid, and inclined guide rods at the ends of the skid for controlling movement of the skid lengthwise of the machine.
Claim 9
Dependent Claim
48 words
The combination recited in claim 1, including a chain extending lengthwise of the conveyor and having anchored ends, a drive sprocket mounted in said body adjacent said conveyor side wall and driven by said winch, and two guide sprockets for guiding the chain part way around the sprocket.
Claim 10
Dependent Claim
31 words
The combination recited in claim 8, including a drive shaft for the drive sprocket mounted in said body above the conveyor, the winch having a shaft for driving said drive shaft.
Claim 11
Dependent Claim
24 words
The combination recited in claim 1, including a second cutter head housing and arm and roll cutter at the opposite end of the machine.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |