NL2006457C2 - Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing. - Google Patents

Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing. Download PDF

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Publication number
NL2006457C2
NL2006457C2 NL2006457A NL2006457A NL2006457C2 NL 2006457 C2 NL2006457 C2 NL 2006457C2 NL 2006457 A NL2006457 A NL 2006457A NL 2006457 A NL2006457 A NL 2006457A NL 2006457 C2 NL2006457 C2 NL 2006457C2
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NL
Netherlands
Prior art keywords
bearing
device segment
conveyor device
housing
screw conveyors
Prior art date
Application number
NL2006457A
Other languages
Dutch (nl)
Inventor
Cornelis Wilhelm Hout
Original Assignee
Superior Highwall Miners Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Superior Highwall Miners Inc filed Critical Superior Highwall Miners Inc
Priority to NL2006457A priority Critical patent/NL2006457C2/en
Priority to PCT/NL2012/050006 priority patent/WO2012128615A2/en
Application granted granted Critical
Publication of NL2006457C2 publication Critical patent/NL2006457C2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/08—Screw or rotary spiral conveyors for fluent solid materials
    • B65G33/14—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing
    • B65G33/18—Screw or rotary spiral conveyors for fluent solid materials comprising a screw or screws enclosed in a tubular housing with multiple screws in parallel arrangements, e.g. concentric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G33/00—Screw or rotary spiral conveyors
    • B65G33/24—Details
    • B65G33/32—Adaptations of bearings or couplings for supporting and connecting screws
    • 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
    • E21F13/02—Transport of mined mineral in galleries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Screw Conveyors (AREA)

Description

Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing
The invention relates to a bearing for screw transporters in a conveyor segment for high 5 wall mining. The invention also relates to a high wall mining conveyor segment for use in a train of conveyor segments for high wall mining, comprising: a conveyor segment housing, auger screw transporters for transporting mined material from and to opposite sides of the conveyor segment housing, and a bearing rotatably connecting the auger screw transporters to the conveyor segment housing.
10
High wall mining is applied in the mining of coal, minerals, ores or other materials in seams or veins under an overburden which may be accessed from an exposed edge of the seam or vein. Highwall mining is applicable where the appropriate machinery can be placed in a cut or trench to extend a cutter head, followed by a train of conveyor 15 segments or units as the cutter head advances, into a substantially horizontal or sloping shaft under the overburden. The conveyor segments are also known as push beams, as they are pushed into the mine, forming an elongating train of conveyor segments as the cutter head advances. Each conveyor segment normally has auger screw transporters to move coal from its lead end to its rear end and further onto the next rearward conveyor 20 segment, and ultimately to the launch vehicle located outside the entrance of the mine shaft. The augers can be powered by shafts connected from one conveyor segment to the next, thus transmitting and distributing the power of a motor on a launch vehicle along all conveyor segments of the train. As the train of conveyor segments is elongated, more power is needed for the transport of mined material. Due to the 25 enhanced demands towards the use of longer trains of conveyor segments and easier/cheaper maintenance and servicing of the conveyor segments there is a demand for further improvements on highwall mining equipment.
Among several other conveyor segment features in the existing conveyor segments the 30 bearing supports of the existing auger screw transporters are simple and functional in their construction. Reference is made to the US 7,523,996 that discloses auger bearing supports provided with pedestals to be secured with bolts to the housing of a conveyor segment.
2
The present invention aims to provide an improved bearing for auger screw transporters in highwall mining conveyor segments that combine the advantages of the prior art bearings and that provide cheaper construction, an enhanced transport functionality and/or easier maintenance and service.
5
The invention provides a bearing for screw transporters in a conveyor segment for high wall mining, comprising a bearing beam holding plural bearing housings and a bearing support that is connectable to a conveyor segment housing, wherein the bearing beam is pendulum pivotably connected with the bearing support. In a specific embodiment the 10 bearing beam is holding two bearing housings and in an in an exemplary embodiment the bearing beam is releaseably connected with a single connection to the bearing support. Such a bearing provides a plain bearing tolerance between the (shafts of the) screw transporters to be hold by the bearing. In the prior art bearings for screw transporters in conveyor segments the tolerances in the distance of the (shafts of the) 15 screw transporters to be hold by the bearing is dictated by sum of the tolerances in a) the individual bearing supports, b) the individual connections of the bearing supports to the conveyor segment housing and c) the dimensions of conveyor segment housing. Now in the present invention the tolerances in the distance of the (shafts of the) screw transporters to be hold by the bearing is solely dictated by the dimensions of the bearing 20 beam and are thus more accurate and simpler to control. A further advantage is that the single connection of the bearing beam with the bearing support provides the releasable coupling of the bearing beam and the bearing support enables a quick exchange of a relative more vulnerable part of a conveyor segment for high wall mining; with a single handling (loosening the bearing beam from the bearing support) bearing beam holding 25 the screw transporters can be loosened from the conveyor segment housing e.g. to be instantaneously exchanged for a replacement set (another bearing beam holding screw transporters). Yet another advantage is that a substantial part of the relative forces between the screw transporters (e.g. torque, thrust, lateral, wobbling and/or lifting forces) are led just through the bearing beam and not through the conveyor segment 30 housing thus enabling the conveyor segments to be higher torque and trust loaded and thus also enabling deeper and steeper highwall mining. The bearing beam being pendulum pivotably connected with the bearing support provides the opportunity of the bearing beam to pivot over a limited rotation range relative to the bearing support. This allows the independent spherical wobbling of the screw transporters limiting the 3 excessive loads to be exerted on (parts of the) screw transporters during use. This leads to a limitation of the Deformation (especially edge deformation) of the screw transporters and to an improved transport of the mined material. These and other advantages enable an easier use and maintenance of the conveyor segment for high wall 5 mining incorporating a bearing according the present invention.
In another exemplary embodiment the bearing beam is connected to the bearing support with a releasable pin. Thus even further enabling a quick exchange of bearing beam with screw transporters be hold by the bearing.
10
In a further exemplary embodiment the bearing beam is provided with two apertures receiving the bearing housings. Normally a conveyor segment for high wall mining includes two screw transporters. And the apertures in the bearing beam receiving the bearing housings are secured accessible for exchange of bearing housings. Such may be 15 realised by apertures that may provide access to exchange the bearing housing; and example for such is the provision of releasable bridges. In the apertures bearing housing halves can be placed that may be provided of flanges, oil or grease grooves, graphite plugs, neoprene/steel labyrinth packing seals and so (non-aluminium) on to enhance the bearing specifications in the harsh environment of highwall mining. The bearing 20 housing (bearing bushing) may be chosen such that is mates the shaft material of the screw transporters. To prevent excessive wear of the screw transporters, bearing housing may be chosen to be of a consumable nature relative to the shaft material of the screw transporters; the wear of the relative expensive screw transporters due to the bearing can thus be limited.
25
As the bearing beam is pendulum pivotably connected with the bearing support and to prevent excessive movement of the bearing beam, the beam is in an exemplary embodiment provided with al least two contact surfaces for abutting on the conveyor segment housing. The bearing beam is thus provided the freedom for limited 30 wobbling/levering freedom. Such limited freedom enables minimal changes in the position of the screw transporters relative to the load (mined material like coal and debris) and thus the transport of the mined material more effective and efficient than when the screw transporters have no relative play towards the mined material.
4
The bearing beam may also be provided with lubricant ports leading towards the bearing housings thus to further optimise the bearing of the screw transporters.
A further exemplary embodiment provides the bearing beam being connected to the 5 bearing support with a play of max. 3 mm so as to promote simple latching of the bearing beam with the bearing support and for inline correction support to and from the screw transporters (power-drive shafts).
As the loads to be conducted through the bearing beam are substantial the bearing beam 10 may advantageously be made out of forced or cast metal.
Another typical exemplary embodiment provides a the bearing support having a central projection that to be inserted in the conveyor segment housing. Such central projection may cooperate with an opening in the housing of a conveyor segments for high wall 15 mining. The construction of the bearing support making is possible to change over prior art the conveyor segments without substantial burden to make them suited for the bearing according the present invention, in other wording they are easy to upgrade so to make them compatible with the bearing according the invention (retrofit).
20 The present invention also provides a conveyor segment for use in a train of conveyor segments for high wall mining, comprising: a conveyor segment housing, auger screw transporters for transporting mined material from and to opposite sides of the conveyor segment housing, and a bearing rotatably connecting the auger screw transporters to the conveyor segment housing, wherein the bearing rotatably connecting the auger screw 25 transporters to the conveyor segment housing is a bearing according one of the preceding claims. The “transporting mined material from and to opposite sides of the conveyor segment housing” is meant to transport the mined material from the lead end (front end) to its rear end (back end). In the conveyor segment a transport channel for the mined material is available wherein the screw conveyors are lined up in a substantial 30 parallel orientation. The advantages already mentioned above in relation to the bearing according the present invention are also applicable to the conveyor segment according the present invention and are incorporated here by reference.
5
In an exemplary embodiment of the conveyor segment the central projection of the bearing support is welded to the conveyor segment housing. The conveyor segment housing may simply be provided with an aperture in the (reinforced part of the) housing that fits the central projection of the bearing support. Prior art conveyor segment 5 housings may thus be easy and cheap be adapted for use with the bearing according the present invention. This is an important advantage as the number of conveyor segment housings in the market is substantial and retrofitting these segments simply in the field is a condition for quick change on a serious scale to the bearing according the invention.
10 Furthermore the conveyor segment housing is in an exemplary embodiment provided with al least two counter-contact surfaces for contacting the bearing beam on spaced apart locations dependant on the relative rotational position of the bearing beam and the bearing support. Relative movement of the bearing beam to the bearing support requires limitation of this rotational freedom, being provided by the counter-contact surfaces of 15 the conveyor segment housing.
A further exemplary embodiment the bearing support is connected to the upper side of the conveyor segment housing and the bearing beam is hanging on the bearing support. Such “hanging bridge” construction providing complete clearance for the mined 20 material on the lower end (bottom) of the conveyor segment housing not disturbing the normal filling grades of the transport channel for the mined material in the conveyor segment.
The present invention also provides a train of conveyor segments according the present 25 invention wherein at least one but preferably more or even all the conveyor segments are provided with a bearing according the present invention. Thus again the reliability of the transport of mined materials by a train of conveyor segments is improved. The use of such conveyor segments allows for enhanced transport efficiency and thus for longer trains of conveyor segments resulting in the feasibility of deeper mining, without 30 the need for increasing power. The train also allows for a higher transport speed of mined material from a cutter head located at one end of the train to the exit of the mining shaft located at the other end. Moreover, the transport may be done in a more energy-efficient manner and with less stagnation compared to the same train with prior art bearings.
6
The present invention will be further elucidated with reference to the non-limitative embodiments shown in the following figures, in which: - figure 1 shows a perspective view of a bearing for screw transporters 5 comprising a bearing beam and a bearing support according the present invention, - figure 2 shows a perspective view of a part of a conveyor segment for highwall mining including a bearing according the present invention, - figure 3 shows a perspective view of a bearing as shown in figure 1 including a 10 part of two screw transporters hold by the bearing, - figure 4 shows a complete perspective view of a bearing as shown in figure 1 including a part of two screw transporters hold by the bearing, and - figure 5 shows a frontal view on the conveyor segment shown in figure 2.
15 Figure 1 shows a bearing 1 according the invention. The bearing 1 comprises a bearing beam 2 holding two bearing housings 3 and a bearing support 4. The bearing support 4 is connected to the bearing beam 2 with a single pin 5 that is easy to be detached. Furthermore this figure 1 shows that the bearing housings 3 in the bearing beam 2 are secured accessible by loosening the detachable bridges 6 that are bolted to the main part 20 of the bearing beam 2. The bearing housings 3 are thus easy to exchange and as the bearing housings 3 are in this figure are even split in two parts (an upper part 3’and a lower part 3” the bearing housings 3 are easy to be placed around screw transporters as shown in subsequent figures 2-5. The detachable bridges 6 may be coupled to the main part of the bearing beam 2 by standard coupling means (not shown here) like bolts.
25
The bearing beam 2 further comprises two contact surfaces 7 of which the working will be explained later in relation to the figures. In the contact surfaces 7 are lubrication ports 8 provided for leading lubricant to the bearing housings 3. Furthermore is shown that the bearing support 4 is provided with a protruding upper part 9 that is provided for 30 coupling with a conveyor segment as will be shown later.
Figure 2 shows a part of a conveyor segment 10 (also known as push beam) with a central trough feed 11 in the housing 12 for the transport of mined material. In the central trough feed 11 two counter-rotating screw conveyors 13 are located for 7 transporting mined material. During operation of the conveyor segment 10 the housing 12 is essentially closed except for openings at opposite sides of a the trough feed (transport channel) 11 that holds the screw conveyors 13. The screw conveyors 13 comprise connectors 14 for attachment of the screw conveyors 13 to screw conveyors 5 13 of adjacent conveyor segments 10 in a train of conveyor segments - not shown in this figure - normally driven by a main engine located at an end of the train outside a mine shaft. The connectors 14 also act as part of a transmission for mechanical power from and to adjacent screw conveyors 1. Each conveyor segment 10 also comprises locking means 15, and contra-locking means fitting the locking means (not shown in this 10 figure), to safeguard the coupling of adjacent conveyor segments 10 in a train of conveyor segments.
In the trough feed 11 of the conveyor segment 10 the bearing support 4 is positioned such that the protruding upper part 9 of the bearing support 4 (just visible) protrudes 15 through an rectangular opening 16 made for this purpose in the housing 12. Also visible is that the bearing housings 3 co-act with central parts (the shafts) 17 of the screw conveyors 13.
Figure 3 shows the cooperation of (a part of) the screw conveyors 13 with the bearing 1 20 in more detail wherein the technical features as referred to in the figures 1 and 2 are indicated with the identical reference signs.
Figure 4 shows the assembly 18 of the screw conveyors 13 with the bearing beam 3 as it may easy be exchanged for a substitute assembly 18 of screw conveyors 13 and bearing 25 beam 3. The simple connection between the bearing beam 3 and the bearing support 4 with a single pin 5 (see previous figures) is loosened here so that the assembly 18 is fast and simple to be detached from a conveyor segments 10 to replace is instantaneously another assembly 18 of the screw conveyors 13 and bearing beam 3.
30 Figure 5 shows the conveyor segment 10 from figure 2 in a frontal view. The screw conveyors 13 turn according arrows A, B in opposite directions thus to transport the mined material. With the discontinuous dotted line 20 the maximum load level for effective transport of mined material is indicated. Furthermore this figure shows two counter-contact surfaces 21 that are provided in the trough feed (transport channel) 11 8 of the conveyor segment 10 that provide support for the two contact surfaces 7 of the bearing beam 2.
Many more advantageous embodiments are possible for a person skilled in the art, other 5 than the non-limitative examples described here.

Claims (16)

1. Lager voor schroeftransporteurs in een transportinrichting-segment voor highwall-mijnbouw, omvattende een draagbalk die meerdere lagerbehuizingen houdt en 5 een lagersteun welke verbindbaar is met een behuizing van een transportinrichting-segment, waarbij de draagbalk zwenkend draaibaar met de lagersteun is verbonden.A bearing for screw conveyors in a conveyor device segment for highwall mining, comprising a support beam that holds a plurality of bearing housings and a bearing support which can be connected to a housing of a conveyor device segment, wherein the support beam is pivotally connected to the bearing support. 2. Lager voor schroeftransporteurs in een transportinrichting-segment volgens conclusie 1, met het kenmerk dat de draagbalk twee lagerbehuizingen omvat. 10Bearing for screw conveyors in a conveyor device segment according to claim 1, characterized in that the bearing beam comprises two bearing housings. 10 3. Lager voor schroeftransporteurs in een transportinrichting-segment volgens conclusie 1 of 2, met het kenmerk dat de draagbalk losneembaar met de lagersteun is verbonden met een enkele verbinding.Bearing for screw conveyors in a conveyor device segment according to claim 1 or 2, characterized in that the bearing beam is releasably connected to the bearing support with a single connection. 4. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één van de voorgaande conclusies, met het kenmerk dat de draagbalk met de lagersteun is verbonden met een losmaakbare pen.Bearing for screw conveyors in a conveyor device segment according to one of the preceding claims, characterized in that the bearing beam is connected to the bearing support with a releasable pin. 5. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één 20 van de voorgaande conclusies, met het kenmerk dat de draagbalk is voorzien van twee openingen die de lagerbehuizingen opnemen.5. Bearing for screw conveyors in a conveyor device segment according to one of the preceding claims, characterized in that the bearing beam is provided with two openings which receive the bearing housings. 6. Lager voor schroeftransporteurs in een transportinrichting-segment volgens conclusie 5, met het kenmerk dat de openingen in de draagbalk die de 25 lagerbehuizingen opnemen zodanig zijn aangebracht dat ze toegankelijk zijn voor uitwisseling van de lagerbehuizingen.6. Bearing for screw conveyors in a conveyor device segment according to claim 5, characterized in that the openings in the bearing beam accommodating the bearing housings are arranged such that they are accessible for exchange of the bearing housings. 7. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één van de voorgaande conclusies, met het kenmerk dat de draagbalk is voorzien van ten 30 minste twee contactoppervlakken om af te steunen tegen de behuizing van het transportinrichting-segment.7. Bearing for screw conveyors in a conveyor device segment according to one of the preceding claims, characterized in that the bearing beam is provided with at least two contact surfaces to support against the housing of the conveyor device segment. 8. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één van de voorgaande conclusies, met het kenmerk dat de draagbalk is voorzien van smeermiddelopeningen die naar de lagerbehuizingen voeren.Bearing for screw conveyors in a conveyor device segment according to one of the preceding claims, characterized in that the support beam is provided with lubricant openings leading to the bearing housings. 9. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één van de voorgaande conclusies, met het kenmerk dat de draagbalk met de lagersteun is verbonden met een speling van maximaal 3 mm.Bearing for screw conveyors in a conveyor device segment according to one of the preceding claims, characterized in that the bearing beam is connected to the bearing support with a play of a maximum of 3 mm. 10. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één 10 van de voorgaande conclusies, met het kenmerk dat de draagbalk is gemaakt van gesmeed of gegoten metaal.Bearing for screw conveyors in a conveyor device segment according to one of the preceding claims, characterized in that the bearing beam is made of forged or cast metal. 11. Lager voor schroeftransporteurs in een transportinrichting-segment volgens één van de voorgaande conclusies, met het kenmerk dat de draagbalk is voorzien van een 15 centraal uitsteeksel dat in de behuizing van het transportinrichting-segment moet worden gestoken.11. Bearing for screw conveyors in a conveyor device segment as claimed in any of the foregoing claims, characterized in that the bearing beam is provided with a central protrusion which must be inserted into the housing of the conveyor device segment. 12. Transportinrichting-segment voor gebruik in een productielijn van segmenten van een transportinrichting voor highwall-mijnbouw, omvattende: 20 een behuizing voor een transportinrichting-segment schroeftransporteurs voor het vervoer van gewonnen materiaal vanuit en naar overliggende plaatsen van de behuizing voor een transportinrichting-segment, en een lager dat de schroeftransporteurs draaibaar verbindt met de behuizing voor 25 een transportinrichting-segment waarbij het lager dat de schroeftransporteurs draaibaar verbindt met de behuizing voor een transportinrichting-segment een lager is volgens één van de voorgaande conclusies.12. Transporting device segment for use in a production line of segments of a transporting device for highwall mining, comprising: a housing for a transporting device segment screw conveyors for transporting recovered material from and to opposite locations of the housing for a transporting device segment and a bearing that rotatably connects the screw conveyors to the housing for a conveyor device segment, wherein the bearing that rotatably connects the screw conveyors to the housing for a conveyor device segment is a bearing according to any one of the preceding claims. 13. Transportinrichting-segment volgens conclusie 12, met het kenmerk dat het centrale uitsteeksel van de lagersteun is gelast aan de behuizing van het transportinrichting-segment.A conveyor device segment according to claim 12, characterized in that the central protrusion of the bearing support is welded to the housing of the conveyor device segment. 14. Transportinrichting-segment volgens conclusie 12 of 13, met het kenmerk dat de behuizing van het transportinrichting-segment is voorzien van ten minste twee contra-contactoppervlakken voor het maken van contact met de draagbalk bij op enige afstand van elkaar gelegen plaatsen afhankelijk van de relatieve draaipositie van de 5 draagbalk en de lagersteun.A conveyor device segment according to claim 12 or 13, characterized in that the housing of the conveyor device segment is provided with at least two counter-contact surfaces for making contact with the bearing beam at locations which are at some distance from each other depending on the relative pivot position of the support beam and the bearing support. 15. Transportinrichting-segment volgens één van de conclusies 12 tot en met 14, met het kenmerk dat de lagersteun is verbonden met de bovenzijde van de behuizing voor het transportinrichting-segment en de draagbalk aan de lagersteun hangt. 10Transporting device segment according to one of claims 12 to 14, characterized in that the bearing support is connected to the top of the housing for the transporting device segment and the bearing beam hangs on the bearing support. 10 16. Productielijn van segmenten van een transportinrichting volgens één van de conclusies 12 tot en met 15.Production line of segments of a conveyor device according to one of claims 12 to 15.
NL2006457A 2011-03-23 2011-03-23 Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing. NL2006457C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2006457A NL2006457C2 (en) 2011-03-23 2011-03-23 Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing.
PCT/NL2012/050006 WO2012128615A2 (en) 2011-03-23 2012-01-04 Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2006457 2011-03-23
NL2006457A NL2006457C2 (en) 2011-03-23 2011-03-23 Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing.

Publications (1)

Publication Number Publication Date
NL2006457C2 true NL2006457C2 (en) 2012-09-25

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NL2006457A NL2006457C2 (en) 2011-03-23 2011-03-23 Bearing for screw transporters in a conveyor segment for high wall mining and high wall mining conveyor segment including such bearing.

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WO (1) WO2012128615A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103274180A (en) * 2013-06-15 2013-09-04 山东恒远利废技术发展有限公司 Spiral paste lifter
CN106115195A (en) * 2016-08-22 2016-11-16 江苏菲力环保工程有限公司 A kind of Double helix conveyer device for sludge drying

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940740A (en) * 1958-03-20 1960-06-14 Salem Tool Co Multiple head coal mining auger
US5087101A (en) * 1990-12-11 1992-02-11 Coaltex, Inc. Power spiral conveyor section and method
US6270163B1 (en) * 1998-09-14 2001-08-07 Holmes Limestone Co. Mining machine with moveable cutting assembly and method of using the same
US7523996B1 (en) * 2005-10-26 2009-04-28 Republic Industries International, Inc Auger car bearing support

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940740A (en) * 1958-03-20 1960-06-14 Salem Tool Co Multiple head coal mining auger
US5087101A (en) * 1990-12-11 1992-02-11 Coaltex, Inc. Power spiral conveyor section and method
US6270163B1 (en) * 1998-09-14 2001-08-07 Holmes Limestone Co. Mining machine with moveable cutting assembly and method of using the same
US7523996B1 (en) * 2005-10-26 2009-04-28 Republic Industries International, Inc Auger car bearing support

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WO2012128615A3 (en) 2013-04-18

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