US3718368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plough drive unit for longwall mining
Assignee: Gewerkschaft Eisenhutte Westfalia GmbH
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Filing: 1971-09-08
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Granted: 1973-02-27
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Expires: 1991-09-08
Abstract
Abstract A mineral mining installation with a scraper chain conveyor guiding a plough alongside a mineral face. The conveyor has a drive station at one end having a frame with side wall members accommodating a drive drum for the chains of the conveyor. The side wall members are received between apertured vertical webs forming part of a further frame supporting the plough drive means. The side wall members and the webs are detachably interconnected with bolts. The further frame is generally Lshaped with a vertical wall adjoining the webs and a horizontal wall bearing the plough drive means and being slidably guided on a bracing beam.
Inventors
- 👤 D Stuckmann
- 👤 C Rassmann
- 👤 W Heyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/06; E21F13/066; E21F13/068
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
In a mineral mining installation comprising a scraper-chain conveyor disposed alongside a mineral face, a plough guided for movement along the mineral face side of the conveyor, means for driving the plough, and a drive station for the conveyor with a frame with two side wall members; the improvement comprising a further frame affixed to the plough drive means, the further frame being detachably secured to the side wall members of the first frame and disposed outwardly relative to the conveyor therefrom.
Claim 2
Dependent Claim
82 words
In a mineral mining installation comprising a scraper-chain conveyor disposed alongside a mineral face, a plough guided for movement along the mineral face side of the conveyor, means for driving the plough, and a drive station for the conveyor with a frame with two side wall members; the improvement comprising a further frame affixed to the plough drive means, the further frame being detachably secured to the side wall members of the first frame and disposed outwardly relative to the conveyor therefrom.
Claim 3
Dependent Claim
36 words
An installation according to claim 1, wherein the further frame is generally L-shaped with an upwardly extending portion carrying coupling pieces for connection to the first frame by means of bolts extending transversally of the conveyor.
Claim 4
Dependent Claim
35 words
An installation according to claim 2, wherein the further frame has a horizontal portion which supports the plough drive means, said horizontal portion being guided on a bracing beam extending substantially perpendicularly to said conveyor.
Claim 5
Dependent Claim
86 words
An installation according to claim 1, wherein the further frame is generally L-shaped with a horizontal portion supporting the plough drive means and an upstanDing portion reinforced by a vertical plate, the vertical plate carrying pairs of apertured webs, each pair of webs forming a coupling piece for receiving the ends of the side wall members of the first frame therebetween, said ends being similarly apertured so that said ends and the coupling pieces can be connected together with bolts extending substantially perpendicularly to the conveyor.
Claim 6
Dependent Claim
35 words
An installation according to claim 4, wherein the horizontal portion of the further frame has guide elements which serve to slidably guide said further frame on a bracing beam extending substantially perpendicular to the conveyor.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |