US3842966A - Travelling mine roof support with scraper conveyor for use with mechanical mining apparatus - Google Patents

Travelling mine roof support with scraper conveyor for use with mechanical mining apparatus Download PDF

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Publication number
US3842966A
US3842966A US00336891A US33689173A US3842966A US 3842966 A US3842966 A US 3842966A US 00336891 A US00336891 A US 00336891A US 33689173 A US33689173 A US 33689173A US 3842966 A US3842966 A US 3842966A
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United States
Prior art keywords
trough
travelling
roof support
side wall
mine roof
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Expired - Lifetime
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US00336891A
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English (en)
Inventor
G Blumenthal
R Krohm
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Kloeckner Werke AG
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Kloeckner Werke AG
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/0445—Extensions of the base member supporting the conveyor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F13/00—Transport specially adapted to underground conditions
    • E21F13/06—Transport of mined material at or adjacent to the working face
    • E21F13/066—Scraper chain conveyors

Definitions

  • the guide member is arranged between the side walls of the trough tiltably between a working position in which the transverse wall thereof extends substantially parallel to the bottom wall of the trough and a raised position providing access to the lower run which is guided by a pair of further side profiles located between the transverse wall of the member and the bottom wall of the trough.
  • the present invention relates to a travelling mine roof support with a scraper conveyor usable in combination with or without mechanical mining apparatus, in which the frame means of travelling mine roof supports are each provided with a base plate adapted to engage the ground of a mine gallery and in which a slide is provided at that side of the base plate which during operation is directed to the mine face, and in which the slide serves as support and guide for at least one run of the scraper conveyor.
  • the slide is connected to the frame means of the respective travelling mine roof support by means of fluid operated cylinder and piston means so that the slide and the travelling mine roof support may stepwise be advanced toward the mine face.
  • the travelling mine roof support with a scraper conveyor mainly comprises frame means of the mine roof support adapted to engage with a base plate thereof the floor of a mine gallery, a slide in form of a U-shaped upwardly open trough having a pair of spaced side walls and a bottom wall and being arranged on that side of the mine roof support which in operation faces the mine face of the gallery.
  • Fluid operated cylinder and piston means are connected to the frame means and the slide for moving the frame means and the slide relative to each other towards the mine face.
  • the arrangement comprises further conveyor channel means arranged in the aforementioned trough for guiding the upper and the lower run of the scraper conveyor, and the aforementioned conveyor channel means comprise a guide member for guiding the upper run of the scraper conveyor and having a pair of transversely spaced side wall profiles connected at the bottom ends thereof by a transverse wall upwardly spaced from the bottom wall of the trough.
  • Hinge means are provided for hingedly connecting one of the side wall profiles of the guide member to one of the side walls of the trough tiltable between a working position in which the transverse wall extends substantially parallel to the bottom wall and a raised position in which the transverse wall is upwardly tilted relative to the bottom wall.
  • Releasable locking means connect the other side wall profile to the other side wall of the trough so that the guide member is suspended on the side wall of the trough.
  • the lower run of the scraper layer is guided in the space between the transverse wall of the member and the bottom wall of the trough.
  • the slide includes a further pair of transversely spaced side wall profiles located between the transverse wall of the guide member and the bottom wall of the trough and fixedly connected to the latter for guiding the lower run of the scraper conveyor.
  • the further pair of transversely spaced side wall profiles which are fixedly connected to the bottom wall of the trough reinforce the latter in a highly desirable manner.
  • the position and dimensions of the further side wall profiles will not only provide for a perfect guiding of the lower run of the scraper conveyor, but this may also provide an additional support for the transverse wall and the side wall profiles connected thereto which guide the upper run of the conveyor.
  • the above-mentioned connection of the guide member which guides the upper run of the scraper conveyor has the advantage that after releasing the releasable means the member may be upwardly tilted so that the lower run will be freely accessible to carry out repairs on the lower run, whenever such should become necessary.
  • This arrangement also permits placing the lower and the upper run in a very expedient manner into the respective guide means provided in the channel means.
  • the aforementioned hinge means and the releasable locking means each comprise substantially identical hinge members respectively fastened to the side walls of the trough and the side wall profiles which are connected to the transverse wall and bolts extending through aligned bores of the hinge members so that, depending upon which of the bolts is withdrawable from the bores of the respective hinge members, the
  • guide member for guiding the upper run may be tilted upwardly on one or the other side wall of the trough.
  • Each of the slides preferably includes also connecting means for connecting the slide associated with one travelling mine roof support to a slide of an adjacent mine roof support for aligning adjacent slides substantially in longitudinal direction, and such connecting means preferably include a pair of connectingelements and supports therefor for each slide located beneath the respective hinge means and releasable locking means in the free spaces between the side walls of the respective trough and the side wall profiles of the guide member of the respective conveyor channel means. Due to the tiltable arrangement of the members for guiding the upper run of the scraper conveyor, the connecting means which are arranged beneath the hinge means are easily accessible during upward tilting of the guide member, and this arrangement will also evidently permit tilting of the guide member in one slide independent of the position of the guide member in the adja cent slide.
  • the transverse walls of the guide members in the slides may abut against each other, and preferably a sealing bar is arranged beneath the abutting or nearly abutting end faces of the transverse walls.
  • This sealing bar preferably rests loosely with opposite ends on the further pair of side wall profiles of the conveyor channel means. The sealing bar will prevent forming of an open gap between adjacent end faces of the transverse walls and since this sealing bar is loosely mounted on the lower pair of side wall profiles it can be easily removed when the lower run of the scraper conveyor has to be placed in or removed from the lower pair of side wall profiles.
  • the sealing bar has preferably an upper roof-shaped surface and the sealing bar is preferably upwardly curved between its opposite ends so that the spring action of the curved sealing bar will assure a tight abutment of the latter against the transverse wall and therewith a positive closure of any gap between opposite end faces of transverse walls.
  • Each sealing bar has preferably downwardly extending projections on opposite ends and such projections have preferably convexly curved bottom faces which engage correspondingly curved cutouts in the further pair of side wall profiles which will assure a proper location of the sealing bars even if adjacent slides, respectively the transverse walls thereof, should not be located in a plane.
  • the support elements of the connecting elements may each be provided with a cutout extending from the upper surface thereof thereinto and the side wall profiles which are connected to the transverse wall may each be provided with a lateral projection located in the respective cutout.
  • Wall means are also. preferably provided projecting inwardly from the side walls of the trough for closing the free space between the trough side walls and the side wall profiles at the upper end of the free space therebetween.
  • the base plate may have a central projection extending beneath the bottom wall of the trough and the slide preferably includes in this case a pair of skid-shaped support members connected to the bottom wall of the trough and respectively located to opposite sides of the aforementioned central projection.
  • the central projection may taper towards that side of the mine roof support which during operation faces the mine face and the skid-shaped support members may be correspondingly tapered.
  • FIG. 4 is a partial side view, partially in section, of a pair of slides and connecting means for connecting the same;
  • FIG. 5 is a sectioned side view of an arrangement for bridging any gap between end faces of transverse walls of adjacent slides.
  • FIG. 1 schematically and partly illustrates a travelling mine roof support RS comprising frame means having a base plate 2 adapted to engage the floor of a mine gallery, a shield la hingedly connected to the base plate 2 and a pair of expandable and collapsible props lb connected at the lower ends thereof to the base plate 2 and at the upper ends, not shown in the drawing, to a portion of the shield lla, likewise not shown in the drawing, so as to press the latter against the roof of a mine gallery.
  • Such mining supports are well known in the art and the mine roof support is therefore only schematically and partly illustrated in the drawing.
  • a slide 3 is arranged forwardly of the mine roof support IRS, that is on the side of the latter which during operation faces a mine face F to be worked, shown in FIG. 2 to the left of the slide 3.
  • Fluid operated cylinder and piston means 5 of likewise known construction connect the base 2 of the mine roof support with the slide 3 so that the slide and the mine roof support may be moved relative to each other stepwise towards or away from the mine face F in a manner known per se.
  • a plurality of such mine roof supports RS and slides 3 connected thereto are usually arranged closely adjacent to each other along the length of a mine gallery and the slides coordinated with adjacent mine roof supports are coupled to each other so that the coupled slides will provide an elongated track for guiding the runs of a scraper conveyor.
  • the slide 3 may be advanced towards the mine face by feeding pressure fluid into the cylinder and piston means 5, whereas when the props lb are moved to the collapsed position, the connected slides 3 will form anchoring means permitting advance of the mine roof supports by means of the cylinder and piston means 5 toward the mine face.
  • one end of the cylinder and piston means 5 is connected by means of a bracket 6 to the slide 3.
  • the base plate 2 may have a central projection 2' on which the slide 3 may be guided during relative movement of the slide and the travelling mine roof support RS in a manner as will be explained later on.
  • the slide 3 has a pair of side walls 113 and i3 integrally connected by a bottom wall 112 so as to form a trough open at the upper end, which is arranged at that side of the support plate 2 which in operation faces the mine face F of the gallery.
  • Conveyor channel means are arranged within the trough for guiding the upper run 9 and the lower 9' of a scraper conveyor, schematically illustrated in FIG. 3.
  • the conveyor channel means comprise a guide member for guiding the upper run 9 of the scraper conveyor and this guide member has a pair of transversely spaced side wall profiles h integrally connected to each other at the bottom ends thereof by a transverse wall d, which is upwardly spaced from the bottom wall 112 of the trough.
  • the guide member comprising the side wall profiles 8 and the bottom wall 4 integrally connected thereto is suspended on the opposite side walls 13 and 13 of the trough by means of hinge means l5 connecting one of the side wall profiles 8 to the side wall T3 of the trough and by releasable locking means l6 connecting the other side wall profile 8 to the side wall 13' of the trough.
  • the side walls 113 and T3 may have equal height, but preferably, as shown in FIG. 1, the side wall 113 of the trough has a height which is about twice the height of the side wall ll3 so as to prevent any material which is dropped on the upper run of the scraper conveyor from accidentally falling on the base plate 2 of the travelling mine roof support.
  • the length of the trough 3 is substantially equal to the width of the base plate 2 of the travelling mine roof support.
  • the slide includes a further pair of side wall profiles 11 which are respectively substantially vertically aligned with the side wall profiles 8 and arranged in the space between the transverse wall 4 and the bottom wall l2 of the trough.
  • Each of the side wall profiles 3 and I1 comprises a pair of tapering legs so as to define a channel of substantially triangular or trapezoidal crosssection in which opposite edge portions of the upper and lower run 9 and 9 of the scraper conveyor are guided, as shown in FIG. 3.
  • the transverse spacing of the two pairs of side wall profiles 8 and 11 is smaller than that of the side walls 13 and 13' of the trough so as to define between the inner face of each side wall and the outer face of the adjacent side wall profiles a free space having a width which corresponds approximately to a third or a fourth of the height of the side wall 13 of the trough.
  • the guide member comprising the side wall profiles 8 and the transverse wall 4 connected thereto is suspended on the side walls 13 and T3 of the trough by hinge means 15 and the releasable locking means 16.
  • the hinge means 15 and the releasable locking means 16 each comprise substantially identical hinge members respectively fastened to the side walls of the trough and the side wall profiles 8 and these hinge members are provided with aligned bores through which bolts 15' and 16 (FIG. 3) respectively extend so that upon withdrawal of the corresponding bolt, the member comprising the side wall profiles 3 and the transverse wall 4 may be upwardly tilted about the other bolt which is left in the aligned bores.
  • the hinge means 15 with the bolt 15 are provided on that side of the trough which during operation faces the face F of the mine gallery which has to be mined so that the member comprising the side wall profiles 8 and the transverse wall 4 may be upwardly tilted to the position, as shown in dash-dotted lines in FIG. 3, whenever it is desired to provide access to the lower run 9 of the scraper conveyor which is guided between the side wall profiles ll.
  • the transverse wall 4 will provide a shield preventing any loose material from the mine face from falling onto the lower run 9' of the scraper conveyor.
  • the side wall profiles ll are welded to the bottom wall 12 of the trough, and the side wall profiles 8 may be constructed to abut against upper faces of the side wall profiles ll.
  • the pivot pin 15' of the hinge means 15 is to be arranged in such a manner that when the guide member comprising the side wall profiles 8 and the transverse wall 4 is tilted upwardly to the position as shown in dash-dotted lines in FIG. 3, the thus tilted member will not obstruct movement of a mechanical mining apparatus 7 schematically indicated in FIGS. 2 and 3 in longitudinal direction along the side wall 13 of the trough.
  • the suspension of the guide member comprising the side wall profiles 8 and the transverse wall 4 on the side walls of the trough has the advantage that this member, which is subjected to considerable wear, may be quickly and conveniently exchanged against a new member, when both bolts l5 and lo are withdrawn.
  • the hinge means and the releasable locking means 16 which are arranged in the spaces 14 between the side walls of the trough and the side wall profiles 8 and 11 are arranged equally and upwardly spaced from the bottom wall 12 of the trough, and each slide preferably includes also connecting means comprising connecting elements or bolts 17 and support elements 18 therefor arranged beneath the hinge means 15 and the releasable locking means 16, respectively.
  • the support elements 18 of the connecting means are connected to the side wall profiles 11 and to adjacent portions of the trough side walls 13 and 13'.
  • the support elements 18 (FIG.
  • each support element 18 of the connecting means may be provided in its upper portion thereof with a cutout forming two prongs 19, whereas the side wall profiles 8 are provided with lateral extensions 20 located between the prongs and these prongs and the lateral extensions 20 are provided with aligned bores extending therethrough for respectively receiving the pins 15' or 16'.
  • the support element 18 on one of the adjacent slides is provided with a projecting portion 18', whereas the other member 18 is provided with a corresponding cavity 18" in which the projecting portion 18' is located when the two slides abut with end faces thereof against each other.
  • the connecting element 17 may include a bolt 17' projecting beyond the projecting portion 18 through a corresponding bore in the support element 18 on the other slide and a nut 17 to be threadingly engaged with the threaded portion of the bolt 17'.
  • the bolt 16' of the releasable locking means 16 preferably has a transversely bent end portion 16", which, when the locking means is in the locking position is located in a slot provided in the side wall 13 of the trough, and which when the releasable locking means should be unlocked is turned upwardly so that the pin 16' may be moved in longitudinal direction in a slot 26 in the side wall 13 to bring the releasable locking means to the unlocked position.
  • the pin 15' of the hinge means 15 may be constructed and cooperate with corresponding slots as described above in connection with the pin 16 of the releasable locking means.
  • the transverse walls 4 of adjacent slides connected to each other by the above-described connecting means will abut or nearly abut 'with end faces thereof against each other.
  • a sealing bar 21 is provided beneath the abutting end faces and the sealing bar 21 rests with opposite ends loosely on pairs of side wall profiles 11.
  • the sealing bar has an upper roof-shaped surface 22 which abuts against corresponding surfaces of cutouts provided in the adjacent end portion of the transverse walls 4. Downwarclly extending projections 23, only one of which is shown in FIG.
  • the sealing bar 21 is preferably slightly upwardly curved between the opposite ends thereof so that when the transverse walls 4 engage the upper surface of the sealing bar, the latter is resiliently pressed against the corresponding surfaces of the transverse walls 4.
  • the sealing bar 21 may be easily lifted from the side wall profiles 11 to provide free access to the space between the latter.
  • the bottom face of the sealing bar 21 is aligned with the bottom faces of the transversely walls 4 so as not to obstruct the free crosssection defined between the side wall profiles 11.
  • the side wall 13 of the trough which, during operation, faces the mine face, may be used as a guide face for a mechanical mining apparatus 7, for instance a coal planer, as schematically indicated in FIGS. 2 and 3.
  • a mechanical mining apparatus 7 for instance a coal planer
  • the channel-shaped space 14 between the trough side wallsand the side wall profiles 8 and 11 facilitates provision of fastening means for such a guide.
  • access to the connecting bolts and similar elements which are arranged in the aforementioned space is facilitated by the tiltable mounting of the guide member comprising the side wall profiles 8 and the transverse wall 4.
  • the mounting of the connecting means 17, 18 at an elevation adjacent to the bottom wall 12 of the trough permits also easy access to the lower run 9' of the scraping means and the connection between adjacent slides may be maintained even if the guide member is upwardly tilted. This greatly facilitates assembly and repair work on the runs of the scraper conveyor.
  • Wall means 27 are mounted on the side walls 13 and 13 at the elevation of the upper edge of the side wall 13 to cover the channel-shaped spaces 14 between the hinge means 15, respectively the members of the releasable locking means 16.
  • the wall means 27 are welded to the side walls 13 and 13' and form thereby also a reinforcement of the same.
  • the central projection 2' of the base plate 2 preferably extends in part beneath the bottom wall 12 of the trough and supports the latter.
  • a pair of skid-shaped support members 28 are welded to the bottom wall 12 of the trough to opposite sides of the central projection 2, and these skid-shaped support members 28 rest on the mine gallery floor.
  • the central projection 2' may be tapered in direction towards the mine face, and the skid-shaped support members 28 may have a corre sponding configuration.
  • Such inclination of the upper surface of the central projection 2' and a corresponding inclination of the bottom wall 2 of the slide is advantageous, especially if a mechanical mining apparatus is mounted on the side wall 13 of the slide, as shown in FIG. 2, since in this way the height of loading of the mined material, for instance coal, is reduced.
  • a travelling mine roof support comprising, in combination, frame meansfor said mine roof support, said frame means having a base plate adapted to engage the floor of a mine gallery; a slide in form of U-shaped upwardly open trough having a spaced side walls and a bottom wall and being arranged atthat side of said base plate which in operation faces the mine face of the gallery; fluid operated cylinder and piston means connected to said frame means and said slide for moving said frame means and said slide relative to each other towards and away from said mine face; a scraper conveyor having an upper and a lower run; and conveyor channel means arranged in said trough for guiding said upper and said lower run of said scraper conveyor, said conveyor channel means comprising a guide member for guiding said upper run of said scraper conveyor and having a pair of transversely spaced side wall profiles connected at the bottom ends thereof by a transverse wall upwardly spaced from said bottom wall of said trough, hinge means for hingedly connecting one of the side wall profiles of said guide member to one of said side walls of said trough tiltable
  • a travelling mine roof support with a scraper bar is upwardly curved between its opposite ends.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Framework For Endless Conveyors (AREA)
  • Structure Of Belt Conveyors (AREA)
US00336891A 1972-03-07 1973-02-28 Travelling mine roof support with scraper conveyor for use with mechanical mining apparatus Expired - Lifetime US3842966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2210897A DE2210897C3 (de) 1972-03-07 1972-03-07 Trag- bzw. Rückschlitten für einen Rinnenschuß bei einem Schildausbaugestell

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US (1) US3842966A (enrdf_load_stackoverflow)
DE (1) DE2210897C3 (enrdf_load_stackoverflow)
FR (1) FR2174844A1 (enrdf_load_stackoverflow)
ZA (1) ZA73989B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074804A (en) * 1975-04-12 1978-02-21 Gewerkschaft Eisenhutte Westfalia Scraper-chain conveyors
US4111296A (en) * 1974-06-25 1978-09-05 Glossop Mark B Rock conveyors
US4241824A (en) * 1975-06-18 1980-12-30 Gewerkschaft Eisenhutte Westfalia Conveyors for use in mineral mining installations
US4359154A (en) * 1979-04-18 1982-11-16 Gewerkschaft Eisenhutte Westfalia Scraper-chain conveyors for mineral mining
US4465407A (en) * 1979-06-16 1984-08-14 Gewerkschaft Eisenhutte Westfalia Fixing bridge
US4624362A (en) * 1984-02-20 1986-11-25 Gewerkschaft Eisenhytte Westfalia Channel sections for scraper-chain conveyors
US4643296A (en) * 1984-08-25 1987-02-17 Halbach & Braun Industrieanlagen Conveyor trough section construction
US6401912B1 (en) * 1999-10-26 2002-06-11 Clarence L. Bandy, Jr. Conveyor pan assembly with replaceable deck
US20100288604A1 (en) * 2008-01-23 2010-11-18 Bucyrus Europe Gmbh Connector device for trough pans on mining equipment trough pan and assembly component for the same
US20110139587A1 (en) * 2008-08-29 2011-06-16 Bucyrus Europe Gmbh Conveyor pan with changeable trough, and a changeable trough
US20130306438A1 (en) * 2010-12-06 2013-11-21 Caterpillar Global Mining Europe Gmbh Connecting device for a through pan of extraction devices, trough pan and attachment therefor
US10914170B2 (en) 2018-10-29 2021-02-09 Joy Global Underground Mining Llc Roof support connector

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904575C2 (de) * 1979-02-07 1983-10-27 Halbach & Braun, 5600 Wuppertal Förderrinne für Kettenkratzförderer, insbesondere Einkettenkratzförderer
DE3324108A1 (de) * 1983-07-05 1985-01-17 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Rinnenschuss fuer kettenkratzfoerderer, insbesondere fuer den einsatz in bergbaubetrieben
DE3335057A1 (de) * 1983-09-28 1985-04-04 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Rinnenschuss fuer kettenkratzfoerderer
DE3348328C2 (en) * 1983-07-05 1991-08-22 Gewerkschaft Eisenhuette Westfalia Gmbh, 4670 Luenen, De Scraper chain conveyor trough section
DE3325794A1 (de) * 1983-07-16 1985-01-24 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Kettenkratzfoerderer, insbesondere fuer den einsatz in bergbaubetrieben

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111296A (en) * 1974-06-25 1978-09-05 Glossop Mark B Rock conveyors
US4074804A (en) * 1975-04-12 1978-02-21 Gewerkschaft Eisenhutte Westfalia Scraper-chain conveyors
US4241824A (en) * 1975-06-18 1980-12-30 Gewerkschaft Eisenhutte Westfalia Conveyors for use in mineral mining installations
US4359154A (en) * 1979-04-18 1982-11-16 Gewerkschaft Eisenhutte Westfalia Scraper-chain conveyors for mineral mining
US4465407A (en) * 1979-06-16 1984-08-14 Gewerkschaft Eisenhutte Westfalia Fixing bridge
US4624362A (en) * 1984-02-20 1986-11-25 Gewerkschaft Eisenhytte Westfalia Channel sections for scraper-chain conveyors
US4643296A (en) * 1984-08-25 1987-02-17 Halbach & Braun Industrieanlagen Conveyor trough section construction
US6401912B1 (en) * 1999-10-26 2002-06-11 Clarence L. Bandy, Jr. Conveyor pan assembly with replaceable deck
US20100288604A1 (en) * 2008-01-23 2010-11-18 Bucyrus Europe Gmbh Connector device for trough pans on mining equipment trough pan and assembly component for the same
US8066112B2 (en) * 2008-01-23 2011-11-29 Bucyrus Europe Gmbh Connector device for trough pans on mining equipment trough pan and assembly component for the same
US20110139587A1 (en) * 2008-08-29 2011-06-16 Bucyrus Europe Gmbh Conveyor pan with changeable trough, and a changeable trough
US8365901B2 (en) * 2008-08-29 2013-02-05 Caterpillar Global Mining Europe Gmbh Conveyor pan with changeable trough, and a changeable trough
US20130306438A1 (en) * 2010-12-06 2013-11-21 Caterpillar Global Mining Europe Gmbh Connecting device for a through pan of extraction devices, trough pan and attachment therefor
US9096378B2 (en) * 2010-12-06 2015-08-04 Caterpillar Global Mining Europe Gmbh Connecting device for a trough pan of extraction devices, trough pan and attachment therefor
US10914170B2 (en) 2018-10-29 2021-02-09 Joy Global Underground Mining Llc Roof support connector

Also Published As

Publication number Publication date
DE2210897B2 (de) 1974-07-11
DE2210897C3 (de) 1975-02-27
DE2210897A1 (de) 1973-09-20
FR2174844A1 (enrdf_load_stackoverflow) 1973-10-19
ZA73989B (en) 1973-11-28

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