US3640574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longwall mining apparatus
Assignee: Individual
•
Filing: 1969-10-02
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Granted: 1972-02-08
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Expires: 1989-10-02
Abstract
Abstract An underground excavating apparatus having a conveyor for removing material from the face of an underground excavation. The conveyor removes the material in a predetermined direction. An elongated cap is movable into engagement with the roof of the excavation above the conveyor extending transversely to the face and the direction in which the conveyor removes the material. A set of props including first props extending upwardly above the conveyor from one side thereof and of the predetermined direction, and second props extending upwardly above the conveyor from the other side of the latter and of the predetermined direction. The props are thus mutually inclined, meeting above the conveyor and engaging and maintaining the cap means in position above the conveyor.
Inventors
- 👤 Hans-Joachim Von Hippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:05
CPC Classifications
E; E21; E21D; E21D17/00; E21D17/02; E21D17/0206
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
In an underground excavating apparatus, in combination, first means for removing material from the face of an underground excavation; conveyor means extending along said face for conveying the removed material away from such face in predetermined direction; elongated cap means movable into engagement with the roof of the excavation above said first means and conveyor means and extending transverSely to said face and said direction, for preventing collapse of said roof; and mutually inclined sets of prop means, including at least one first prop extending upwardly into supporting engagement with said cap means from a side of said conveyor means closer to said face, and at least two second props extending upwardly into supporting engagement with said cap means from a side of said conveyor means farther from said face and inclined with reference to one another in said predetermined direction, said props of each set having upper end portions engaging said cap means above said conveyor means.
Claim 2
Dependent Claim
158 words
In an underground excavating apparatus, in combination, first means for removing material from the face of an underground excavation; conveyor means extending along said face for conveying the removed material away from such face in predetermined direction; elongated cap means movable into engagement with the roof of the excavation above said first means and conveyor means and extending transverSely to said face and said direction, for preventing collapse of said roof; and mutually inclined sets of prop means, including at least one first prop extending upwardly into supporting engagement with said cap means from a side of said conveyor means closer to said face, and at least two second props extending upwardly into supporting engagement with said cap means from a side of said conveyor means farther from said face and inclined with reference to one another in said predetermined direction, said props of each set having upper end portions engaging said cap means above said conveyor means.
Claim 3
Dependent Claim
19 words
In an apparatus as defined in claim 1, wherein said props have lower ends mounted on said conveyor means.
Claim 4
Dependent Claim
43 words
In an apparatus as defined in claim 1, wherein said second props each have lower end portions spaced in said predetermined direction, and wherein said upper end portions of said second props engage said cap means at least substantially proximal to one another.
Claim 5
Dependent Claim
20 words
In an apparatus as defined in claim 1, wherein said upper end portions engage said cap means at spaced locations.
Claim 6
Dependent Claim
37 words
In an apparatus as defined in claim 1, said cap means being movable towards said face transversely to said direction for advancement in response to receding of said face resulting from removal of the material being excavated.
Claim 7
Dependent Claim
42 words
In an apparatus as defined in claim 1, wherein said props all have lower end portions, and wherein the lower end portions of said second props are located at a level above that of the lower end portions of said first props.
Claim 8
Dependent Claim
36 words
In an apparatus as defined in claim 1, said props all having lower end portions; and further comprising mounting means mounting said lower end portions of said first props for resilient yielding movement in said direction.
Claim 9
Dependent Claim
47 words
In an apparatus as defined in claim 1, said first props having upper end portions adjacent said cap means and defining therewith a predetermined angle; and auxiliary means associated with said first means and being mounted below said cap means in a space defined by said angle.
Claim 10
Dependent Claim
65 words
In an apparatus as defined in claim 1, said first means being electrically operated, and said first props having upper end portions adjacent said cap means and defining therewith a predetermined angle; and elongated looped conductor means for supplying electric energy to said first means, arranged in the space defined by said angle between said cap means and upper end portions of said second props.
Claim 11
Dependent Claim
36 words
In an apparatus as defined in claim 9, wherein said space is elongated, and extends substantially horizontally in said direction, and wherein said conductor means comprises at least one elongated loop extending longitudinally of said space.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |