WO2019173502A1 - Safety pull cord for a conveyor - Google Patents
Safety pull cord for a conveyor Download PDFInfo
- Publication number
- WO2019173502A1 WO2019173502A1 PCT/US2019/020997 US2019020997W WO2019173502A1 WO 2019173502 A1 WO2019173502 A1 WO 2019173502A1 US 2019020997 W US2019020997 W US 2019020997W WO 2019173502 A1 WO2019173502 A1 WO 2019173502A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spool
- cord
- conveyor
- retractor
- conveyor train
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 description 20
- 230000007246 mechanism Effects 0.000 description 6
- 230000000981 bystander Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/22—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration comprising a series of co-operating units
- B65G15/26—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration comprising a series of co-operating units extensible, e.g. telescopic
-
- 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
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
-
- 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
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
-
- 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
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/10—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof
- B65G21/14—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof to allow adjustment of length or configuration of load-carrier or traction element
-
- 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
- B65G67/00—Loading or unloading vehicles
- B65G67/02—Loading or unloading land vehicles
- B65G67/04—Loading land vehicles
- B65G67/10—Loading land vehicles using conveyors covering the whole length of vehicle trains
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
- H01H3/0226—Emergency operating parts, e.g. for stop-switch in dangerous conditions operated by a pull cord
Definitions
- the present application relates to conveyor systems, and more particularly to a safety pull cord for a conveyor.
- Mining conveyors facilitate the movement of a mined material.
- conveyors are required to have a safety pull cord that can be operated to shut down the conveyor in case of an emergency.
- some conveyors are flexible and move throughout a mining cycle causing conventional pull cords to accidentally shut down the conveyor.
- conventional pull cords provide a large amount of slack requiring a user to pull a significant amount before the conveyor shuts down.
- a conveyor system includes a flexible conveyor train configured to move along a path, a controller, and a safety actuator supported on the conveyor train.
- the conveyor train includes a first end, a second end, a continuous belt for transporting material along a length of the conveyor train, and at least one motor for driving the continuous belt.
- the controller is in communication with the motor to control operation of the conveyor train.
- the safety actuator includes a retractor, a trip switch electrically coupled to the controller, and a cord having a first end and a second end. The first end is coupled to the retractor, and the second end is coupled to the trip switch.
- a conveyor system in another embodiment, includes a conveyor train movable upon a support surface, a controller, and a safety actuator.
- the conveyor train includes a plurality of movable segments coupled to one another in series, a continuous belt for transporting material along a length of the conveyor train, and at least one motor for driving the continuous belt.
- the controller is supported by the conveyor train and operable to control operation of the conveyor train.
- the safety actuator is supported on the conveyor train and includes a cord, a spool for receiving the cord, and a clutch. While a rotational speed of the spool exceeds a predetermined level, the clutch inhibits rotation of the spool, thereby causing the controller to stop operation of the conveyor train.
- a conveyor system in yet another embodiment, includes a flexible conveyor train configured for movement along an underground path, a trip switch, and a cord.
- the conveyor train includes a first end, a second end, a continuous belt for transporting material along a length of the conveyor train, and at least one motor.
- the trip switch is selectively operable in a first mode in which operation of the motor is permitted and a second mode in which operation of the motor is inhibited.
- the cord is partially wrapped onto a spool and coupled to the trip switch.
- the spool is biased to wrap the cord onto the spool, and application of a force on the pull cord is operable to change the trip switch from the first mode to the second mode.
- FIG. 1 A illustrates an overview of a mining roadway and mining operation.
- FIG. 1B is a perspective view of a conveyor.
- FIG. 2 is a front elevation view of a safety actuator.
- FIG. 3 A is a side view of a retractor of the safety actuator of FIG. 2 in a free position.
- FIG. 3B is a side view of the retractor in a locked position.
- FIG. 4A is a perspective view of the retractor in a free position, with a clutch and cam member removed.
- FIG. 4B is a perspective view of the retractor in a locked position, with a clutch and cam member removed.
- FIG. 5 is a perspective view of a retractor according to another embodiment.
- FIG. 6 is a cross-sectional view of the retractor of FIG. 5, viewed along section 6—6.
- embodiments may include hardware, software, and electronic components or modules that, for purposes of discussion, may be illustrated and described as if the majority of the components were implemented solely in hardware.
- aspects may be implemented in software (for example, stored on non-transitory computer-readable medium) executable by one or more processing units, such as a microprocessor, an application specific integrated circuits (“ASICs”), or another electronic device.
- processing units such as a microprocessor, an application specific integrated circuits (“ASICs”), or another electronic device.
- ASICs application specific integrated circuits
- controllers may include one or more electronic processors or processing units, one or more computer- readable medium modules, one or more input/output interfaces, and various connections (for example, a system bus) connecting the components.
- ETnderground roadway development equipment typically includes a continuous miner and haulage equipment that transports cut material from a cutting face.
- a mining machine e.g., a continuous miner
- the mining machine 10 performs a cutting operation that includes cutting material from the cutting face and directing the cut material onto a conveyor (e.g., a flexible conveyor train or FCT) 14 to transfer the cut material to other material handling equipment (e.g., a crusher and/or feeder breaker).
- a conveyor e.g., a flexible conveyor train or FCT
- FCT flexible conveyor train
- an operator controls both the mining machine 10 and the flexible conveyor train 14 using a remote control.
- an operator may control the mining machine 10 and the flexible conveyor train 14 from a deck on the flexible conveyor train 14.
- the conveyor 14 is a flexible conveyor train.
- the flexible conveyor train 14 follows the mining machine 10 to collect and transport mined material.
- the flexible conveyor train 14 is capable of moving forward and backward along the underground roadway and is capable of turning.
- the flexible conveyor train 14 employs a plurality of segments or cars 18 coupled to one another in series.
- the cars 18 are coupled by universal joints to allow the flexible conveyor train 14 to flex in lateral and vertical directions.
- the flexible conveyor train 14 includes a flexible continuous conveyor belt 22 that wraps around rollers on the cars 18 to transport mined material from the mining machine 10 to the other material handling equipment.
- each of the cars 18 of the flexible conveyor train 14 includes a controller 26 (FIG. 1 A) and a safety pull cord system 30.
- the controllers 26 control the operation of the carts 18 and can communicate with one another and with a controller on the mining machine 10.
- the flexible conveyor train 14 includes a plurality of safety actuators or pull cords 30.
- a safety actuator or pull cord system 30 extends along one or more cars 18 of the flexible conveyor train 14.
- the safety actuator includes a pull cord 42 extending between a first end 34 and a second end 38 opposite the first end 34.
- the first end 34 of the safety actuator can be fixed (e.g., by screws, bolts, adhesives, etc.) to the flexible conveyor train 14 at, for example, a position near the back of a respective car 18.
- the second end 38 of the safety actuator can be fixed (e.g., by screws, bolts, adhesives, etc.) to the flexible conveyor train 14 at, for example, a position adjacent a controller 26 of the car 18.
- the first end 34 of the safety pull cord system 30 includes a retractor 46 positioned in a housing 50.
- the retractor 46 includes a spool 54, a resilient member (not shown), a centrifugal clutch 62, a cam member 66, and a pawl 70.
- the spool 54 is rotatably coupled to the inside of the housing 50 and includes a ratchet portion including teeth 74 positioned along an outer periphery.
- a first end 78 (FIG. 2) of the cord 42 is coupled to the spool 54 and slack from the cord 42 is wound about the spool 54.
- the resilient member biases the spool 54 to rotate in a first direction (e.g., counter-clockwise as seen in FIG.
- the centrifugal clutch 62 is pivotally coupled to the spool 54 adjacent the ratchet teeth 74.
- the clutch 62 is pivotably coupled to the spool 54 about a pin 76, and is biased toward a retracted or radially inward position by a spring 80.
- the cam member 66 is supported adjacent the spool 54.
- the cam member 66 is coupled to the pawl 70 by a sliding pin 82 that slides within an aperture 86 on the pawl 70.
- the retractor mechanism 46 acts to wind slack from the cord 42 around the spool 54. Slack from the cord 42 may be unwound or paid out from the retractor mechanism 46 when the spool 54 rotates in a second direction (e.g., clockwise as shown in FIGS. 3 A and 3B) against the bias of the resilient member. Releasing the cord 42 allows the resilient member to act on the spool 54 rotating it in the first direction to wind up the slack of the cord 42 (FIG. 4A). However, if slack from the cord 42 is paid out rapidly, the spool 54 will increase its rotational speed.
- a second direction e.g., clockwise as shown in FIGS. 3 A and 3B
- the increased rotational speed increases the rotational force on the spool 54 and causes the centrifugal clutch 62 to pivot driving an end 90 of the centrifugal clutch 62 radially outward away from the spool 54.
- the end 90 of the centrifugal clutch 62 engages and pushes the cam member 66 (e.g., upwardly as shown in FIG. 3B), moving the sliding pin 82 along the aperture 86.
- the movement of the sliding pin 82 pulls the pawl 70 into the path of the spinning ratchet teeth 74 of the spool 54 as shown in FIGS. 3B and 4B, inhibiting rotation of the spool 54 in the second direction and inhibiting payout of the cord 42.
- the retractor mechanism 46 is operable in a first mode in which the spool 54 is allowed to pay out slack from the cord 42, and operable in a second mode in which the spool 54 is prevented from paying out slack from the cord 42.
- the second end 38 of the safety actuator 30 includes a trip switch 94.
- the trip switch 94 includes a conductor 98 that is electrically coupled to the controller 26 of the car 18 of the flexible conveyor train 14 on which the corresponding safety pull cord system 30 is positioned.
- the trip switch 94 is operable in a first mode in which the trip switch 94 communicates with the controller 26 to operate the flexible conveyor train 14, and in a second mode in which the trip switch 94 communicates with the controller 26 to stop operation of the flexible conveyor train 14.
- the trip switch 94 further includes a latch 102, an emergency stop button 106, and a reset button 110.
- the latch 102 is coupled to a second end 114 of the cord 42 and is moveable between a first position and a second position. While the latch 102 is in the first position, the trip switch 94 is in the first mode to communicate with the controller 26 to operate the flexible conveyor train 14. While the latch 102 is in the second position, the trip switch 94 is in the second mode to communicate with the controller 26 to stop the motors running the flexible conveyor train 14.
- the emergency stop button 106 may be depressed to stop the motors of the flexible conveyor train 14 and the mining machine 10.
- the flexible conveyor train 14 and the mining machine 10 may be stopped by either actuating the emergency stop button 106 or moving the latch 102 to the second position (e.g., by pulling the cord 42).
- the latch 102 In order to resume operation of the mining machine 10 and flexible conveyor train 14, the latch 102 must be returned to the first position and/or the emergency stop button 106 must be returned to a non-depressed position and the reset button 110 must be actuated.
- the cord 42 is a poly-coated twisted/braided cord; the cord 42 can be made from a rope material covered in a polymer resin.
- the cord 42 may include clips/hooks 118 at both the first and second ends 78, 114 to attach to the trip switch 94 and/or the spool 54.
- Eyelets 122 may be coupled to the flexible conveyor train 14 between the first and second ends 34, 38 of the safety pull cord system 30 for the cord 42 to slide through and be supported.
- the flexible conveyor train 14 follows the mining machine 10 along the underground roadway. As the flexible conveyor train 14 moves, it traverses turns and rough terrain that requires it to flex and curve to maneuver around the underground passages.
- the maneuvering of the flexible conveyor train 14 will require more slack from the cord 42 in order to avoid an unintentional shut off of the mining equipment.
- the spool 54 will rotate to pay out the cord 42 from the retractor mechanism 46. Then, after the flexible conveyor train 14 has completed the turn, the slack is no longer needed and the resilient member rotates the spool 54 in an opposite direction to wind the cord 42 onto the spool 54.
- the cord 42 is allowed to extend and retract as needed without activating the trip switch 94. It should be noted that normal movement of the flexible conveyor train 14 is not sufficient to pull the cord 42 to lock the spool 54 and activate the trip switch 94.
- an operator or a bystander may pull the cord 42 sharply to shut the flexible conveyor train 14 down.
- the bystander could pull the cord 42.
- pulling the cord 42 sharply applies an increased centrifugal force to the spool 54 that causes the end 90 of the centrifugal clutch 62 to pivot.
- the centrifugal clutch 62 pushes the cam member 66 moving the pawl 70 into contact with the ratchet teeth 74, thereby stopping the rotation of the spool 54.
- the stopping of the spool 54 discontinues payout of the cord 42 and allows the second end 114 of the cord 42 to move the latch 102 of the trip switch 94 from the first position to the second position, shutting off the motors of the mining machine 10 and the flexible conveyor train 14.
- the latch 102 of the trip switch 94 can be moved back to the first position and the reset button 110 pressed to continue operation of the flexible conveyor train 14 and the mining machine 10.
- Providing a flexible conveyor train 14 with a safety pull cord system 30 including a centrifugal clutch 62 and a spool 54 advantageously allows the flexible conveyor train 14 to adhere to safety regulations while still permitting movement without activating a trip switch 94.
- the safety pull cord system 30 can be pulled by an operator in an emergency to shut down the flexible conveyor train 14.
- providing a conveyor 14 with a safety pull cord system 30 with a centrifugal clutch 62 and spool 54 manages the cord 42 to avoiding the excessive slack. Reducing slack allows a bystander or an operator to effectively pull the cord 42 to deactivate the conveyor 14 when needed.
- FIGS. 5 and 6 illustrates a retractor mechanism 200 according to another
- the retractor 200 is similar to the retractor 46, and some of the differences are described herein.
- the retractor 200 is positioned in the housing 50 and includes a spool 204 and a clutch 208.
- the spool 204 is supported for rotation on a drive shaft 212.
- the first end 78 of the cord 42 is coupled to the spool 204 and a portion of the cord 42 is wound about the spool 204.
- a resilient member biases the spool 204 to rotate in a first direction (e.g., counter clockwise) to wind up any slack from the cord 42.
- the clutch 208 is also supported on the drive shaft 212.
- the clutch 208 includes biasing members 216 (FIG. 6). As the speed of the drive shaft 212 increases, the biasing member 216 may be overcome and friction elements 218 may move radially outwardly to engage an inner surface of a drum 210, thereby stopping rotation of the drum 210.
- the retractor 200 acts to wind slack from the cord 42 around the spool 204.
- the cord 42 may be unwound or paid out from the retractor mechanism 200 when the spool 204 rotates in a second direction (e.g., clockwise) against the bias of the resilient member. Releasing the cord 42 allows the resilient member to act on the spool 204 rotating it in the first direction to wind up the slack of the cord 42.
- the rotational speed of the spool 204 will increase. The increased rotational speed increases the rotational force on the spool 204 and causes the friction elements 218 to engage the drum 210 and apply a braking force to inhibit rotation of the spool 204 and thus payout of the cord 42.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Aviation & Aerospace Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
- Control Of Conveyors (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
- Escalators And Moving Walkways (AREA)
- Ropes Or Cables (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3093410A CA3093410A1 (en) | 2018-03-06 | 2019-03-06 | Safety pull cord for a conveyor |
RU2020132611A RU2769319C1 (en) | 2018-03-06 | 2019-03-06 | Emergency shutdown cable for a conveyor |
GB2015636.0A GB2586730B (en) | 2018-03-06 | 2019-03-06 | Safety pull cord for a conveyor |
AU2019231680A AU2019231680A1 (en) | 2018-03-06 | 2019-03-06 | Safety pull cord for a conveyor |
ZA2020/05983A ZA202005983B (en) | 2018-03-06 | 2020-09-28 | Safety pull cord for a conveyor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862639000P | 2018-03-06 | 2018-03-06 | |
US62/639,000 | 2018-03-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019173502A1 true WO2019173502A1 (en) | 2019-09-12 |
Family
ID=66379646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2019/020997 WO2019173502A1 (en) | 2018-03-06 | 2019-03-06 | Safety pull cord for a conveyor |
Country Status (6)
Country | Link |
---|---|
AU (2) | AU2019231680A1 (en) |
CA (2) | CA3035866A1 (en) |
GB (2) | GB2586730B (en) |
RU (2) | RU2019106293A (en) |
WO (1) | WO2019173502A1 (en) |
ZA (2) | ZA201901396B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113460615A (en) * | 2021-07-06 | 2021-10-01 | 安徽溢彩玻璃器皿有限公司 | Safety shutdown device for glass production belt conveyor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843707A (en) * | 1955-05-03 | 1958-07-15 | Jab Company Inc | Electrical safety switch |
US3760910A (en) * | 1972-04-14 | 1973-09-25 | A Koshihara | Safety device |
EP1081066A2 (en) * | 1999-08-27 | 2001-03-07 | BMH Wood Technology Oy | Scraper conveyor for transporting bulk material |
US7022930B2 (en) * | 2003-12-04 | 2006-04-04 | Honeywell International Inc. | Single directional cable actuated emergency stop device |
US20160186566A1 (en) * | 2013-08-12 | 2016-06-30 | Fred STANFORD | Apparatus, system and method for material extraction in underground hard rock mining |
US20170140890A1 (en) * | 2015-11-17 | 2017-05-18 | Rockwell Automation Technologies Inc. | Safety switch and associated methods |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3531610A (en) * | 1967-10-30 | 1970-09-29 | Band B Co | Pull cord type conveyor belt control switch |
GB2078447A (en) * | 1980-06-18 | 1982-01-06 | Huwood Ardee Ltd | Conveyor systems |
CN201072760Y (en) * | 2007-06-18 | 2008-06-11 | 无锡尚德太阳能电力有限公司 | Intelligent solar cell photovoltaic component |
DE102015111071A1 (en) * | 2015-07-08 | 2017-01-12 | Vossloh Kiepe Gmbh | Switching device with a ripcord |
-
2019
- 2019-03-06 AU AU2019231680A patent/AU2019231680A1/en active Pending
- 2019-03-06 GB GB2015636.0A patent/GB2586730B/en active Active
- 2019-03-06 CA CA3035866A patent/CA3035866A1/en active Pending
- 2019-03-06 AU AU2019201543A patent/AU2019201543A1/en not_active Abandoned
- 2019-03-06 RU RU2019106293A patent/RU2019106293A/en not_active Application Discontinuation
- 2019-03-06 ZA ZA2019/01396A patent/ZA201901396B/en unknown
- 2019-03-06 WO PCT/US2019/020997 patent/WO2019173502A1/en active Application Filing
- 2019-03-06 CA CA3093410A patent/CA3093410A1/en active Pending
- 2019-03-06 RU RU2020132611A patent/RU2769319C1/en active
- 2019-03-06 GB GB1902982.6A patent/GB2573614B/en active Active
-
2020
- 2020-09-28 ZA ZA2020/05983A patent/ZA202005983B/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843707A (en) * | 1955-05-03 | 1958-07-15 | Jab Company Inc | Electrical safety switch |
US3760910A (en) * | 1972-04-14 | 1973-09-25 | A Koshihara | Safety device |
EP1081066A2 (en) * | 1999-08-27 | 2001-03-07 | BMH Wood Technology Oy | Scraper conveyor for transporting bulk material |
US7022930B2 (en) * | 2003-12-04 | 2006-04-04 | Honeywell International Inc. | Single directional cable actuated emergency stop device |
US20160186566A1 (en) * | 2013-08-12 | 2016-06-30 | Fred STANFORD | Apparatus, system and method for material extraction in underground hard rock mining |
US20170140890A1 (en) * | 2015-11-17 | 2017-05-18 | Rockwell Automation Technologies Inc. | Safety switch and associated methods |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113460615A (en) * | 2021-07-06 | 2021-10-01 | 安徽溢彩玻璃器皿有限公司 | Safety shutdown device for glass production belt conveyor |
CN113460615B (en) * | 2021-07-06 | 2022-11-04 | 安徽溢彩玻璃器皿有限公司 | Safety shutdown device for glass production belt conveyor |
Also Published As
Publication number | Publication date |
---|---|
RU2769319C1 (en) | 2022-03-30 |
GB2573614B (en) | 2022-06-15 |
AU2019231680A1 (en) | 2020-10-22 |
GB201902982D0 (en) | 2019-04-17 |
GB202015636D0 (en) | 2020-11-18 |
GB2586730B (en) | 2022-06-15 |
ZA201901396B (en) | 2020-01-29 |
CA3093410A1 (en) | 2019-09-12 |
CA3035866A1 (en) | 2019-09-06 |
AU2019201543A1 (en) | 2019-09-26 |
GB2573614A (en) | 2019-11-13 |
GB2586730A (en) | 2021-03-03 |
RU2019106293A (en) | 2020-09-07 |
ZA202005983B (en) | 2021-08-25 |
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