EP0687482A2 - Dispositif et procédé d'arrêt de chute - Google Patents

Dispositif et procédé d'arrêt de chute Download PDF

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Publication number
EP0687482A2
EP0687482A2 EP95109474A EP95109474A EP0687482A2 EP 0687482 A2 EP0687482 A2 EP 0687482A2 EP 95109474 A EP95109474 A EP 95109474A EP 95109474 A EP95109474 A EP 95109474A EP 0687482 A2 EP0687482 A2 EP 0687482A2
Authority
EP
European Patent Office
Prior art keywords
drum
rotation
pawl
ring
housing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP95109474A
Other languages
German (de)
English (en)
Other versions
EP0687482A3 (fr
Inventor
Wayne L. Olson
Gary E. Choate
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rose Systems Inc
Original Assignee
Rose Systems 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 Rose Systems Inc filed Critical Rose Systems Inc
Publication of EP0687482A2 publication Critical patent/EP0687482A2/fr
Publication of EP0687482A3 publication Critical patent/EP0687482A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/0093—Fall arrest reel devices

Definitions

  • This invention relates generally to devices for arresting the fall of an individual and more particularly to the use of webbing wound, on the drum of a fall arresting device to arrest the fall.
  • This invention provides a device and a method for arresting the fall of an individual using an elongated webbing wound on a rotatable drum in a housing so that, when a fall occurs and the rotation of the drum is stopped, the fall arresting force is absorbed by the compaction of a plurality of layers of the elongated webbing and in some instances by the compaction of a resilient means between the drum and the first layer of the elongated webbing and when necessary, by the elongation of the portion of the elongated webbing located outside of the housing.
  • the fall arresting device comprises a housing having an opening formed therein.
  • a drum is rotatably mounted in the housing and has an axis of rotation.
  • An elongated webbing is wound on the drum and has one end secured to the drum and the other end thereof passing out through the opening.
  • a connecting device is secured to the other end of the elongated webbing for connecting the other end where desired, such as to a harness on a worker.
  • Force applying means such as a falling body, apply a force on the connecting device to rotate the drum.
  • Stop means are provided for preventing rotation of the drum when a predetermined rotational velocity thereof has been reached.
  • Arresting means are provided for absorbing the fall arrest energy and reducing the deceleration forces applied to the load supporting device.
  • the stop means comprise at least a portion of the drum having an outer surface having at least one cam thereon.
  • At least one pawl is pivotally mounted at a fixed location on the housing and has a surface in contact with the outer surface.
  • At least one catch is mounted on the drum for rotation therewith.
  • Resilient means are provided for urging the surface of the pawl into contact with the outer surface.
  • the cam is located on a first radian of the axis of rotation of the outer surface spaced in a circumferential direction from a second radian of the axis of rotation of the outer surface passing through the at least one catch in the direction of rotation of the drum.
  • the cam moves the pawl into the engagement zone above the catch at lower than locking speeds and requires the normal action of the spring and pivot pin to pull the pawl out of the engagement zone before the tip of the sperrad catch engages it, thus providing a fail safe system.
  • the cam applies sufficient force on the pawl to overcome the resilient means and move the at least one pawl into contact with the at least one catch to prevent rotation of the drum.
  • Resilient means are provided to act on the drum to apply a resilient force on any portion of the elongated webbing extending out of the housing and to rotate the drum to rewind the extended webbing.
  • the resilient means comprise a coiled spring having a plurality of layers with all but a few of the layers having a diameter at least twice the diameter of the central body portion of the drum.
  • the coiled spring has one end secured to the housing at a fixed location and another end secured to the drum for rotation therewith.
  • the fall arresting means comprise a plurality of layers of the elongated webbing wound on central body portion of the drum. When a fall occurs, the plurality of layers wound on the central body portion of the drum are compressed when the rotation of the drum is stopped. The fall may further be arrested by the elongation of the portion of the elongated webbing unwound from the drum.
  • resilient means are located between the outer surface of the central body portion of the drum and the first layer of the elongated webbing to provide for additional compaction of the layers of the elongated webbing.
  • the method further comprises pulling a portion of the elongated webbing out of the housing and stretching the portion of the elongated webbing pulled out of the housing to aid in arresting the downward movement of the connecting device in the event of a fall.
  • means are provided for attaching a fall arresting device to a harness of the type described in United States Patent No. 4,712,513.
  • the attachment means comprise a D-ring attached to the harness and secured to a nozzle secured between the front and rear cover plates with a portion of the nozzle extending through the D-ring.
  • Locking means are provided on the nozzle for permitting movement of the D-ring over the portion of the nozzle but preventing removal of the D-ring after the D-ring has passed over the portion of the nozzle.
  • Abutment means are provided on another portion of the nozzle for preventing movement of the D-ring over the another portion.
  • additional locking means are provided for urging the D-ring into contact with the locking means.
  • a fail arrester 2 of this invention having an anchorage mount configuration.
  • the fall arrester 2 has a housing 4 having an arcuate extent, Fig. 5, of about 290 degrees so as to provide for an opening 6.
  • the housing 4 has a plurality of circumferentially spaced apart threaded openings 8 for purposes described below.
  • a front cover plate 10 and a rear cover plate 12, Figs. 2 and 4 each have a plurality of circumferentially spaced apart openings 14 so that headed threaded bolts 16 may pass through the openings 14 and be threadedly secured in the threaded openings 8 to secure the front 10 and rear 12 cover plates to the housing 4.
  • a drum 20 is mounted for rotation about an axis of rotation in the housing 4 and has a central body portion 22 having generally cylindrical inner surfaces 24 and 26 on either side of a central radially inwardly extending flange 28.
  • Bearings 30 and 32 are mounted on the generally cylindrical surfaces 24 and 26.
  • a fixed shaft 34 has a generally cylindrical surface 36 which is in contact with the other side of the bearings 30 and 32 to allow for rotation of the drum 20. The ends of the shaft 34 fit into recesses 38 and 40 in the front 10 and rear 12 cover plates and are secured therein by headed threaded bolts 42 and 44.
  • An annular plate 50 is secured on the central body portion 22 using a plurality of circumferentially spaced apart headed threaded bolts 52.
  • a flange portion 54 projects radially outwardly from the central body portion 22 and cooperates with the annular plate 50 to define a first cavity 56.
  • An elongated webbing 58 is wound on a generally cylindrical outer surface 60 and is located in the first cavity 56.
  • One end 62 of the elongated webbing 58 is secured to the central body portion by suitable means described below.
  • the other end 64 passes out of the housing 4 through a nozzle 66, explained more fully below.
  • the other end 64 is permanently secured to a portion 68 of the elongated webbing 58.
  • Other portions 70 of the other end 64 are doubled upon themselves and temporarily secured together.
  • a connecting device 72 such as a D-ring, snap hook or other similar devices, is located between the other end 64 and the other portions 70 for connecting the other end 64 where desired, such as to the harness (not shown) of a worker.
  • the inner surfaces of the other portions 70 are distinctively colored so that when sufficient force is placed on the connecting device to arrest a fall, the other portions will be broken open to reveal the colored portions to indicate that the fall arrester 2 has been used.
  • a second cavity 80 is formed between the annular plate 50 and the front cover plate 10.
  • a coiled spring 82 Figs. 2 and 7, is located in the second cavity 80 and has one end thereof secured to the nozzle, described below, by suitable means (not shown).
  • the other end 86 of the coiled spring 82 is secured in the central body portion 22 so that as the central body portion 22 rotates, the coiled spring 82 is wrapped thereon.
  • the coil spring 82 exerts a varying force of between about 3 pounds on the outer layer of the elongated webbing 58 and about 12 pounds on the inner layer of the elongated webbing 58 on the central body portion 22 tending to keep the elongated webbing 58 wound on the reel 20.
  • the coiled spring 82 is attached to ride in the housing, not the drum, so that in its unwound state substantially all of the coils thereof are adjacent to the housing 4.
  • a handle 90 is secured to the housing 4 by suitable means such as headed threaded bolts 91 passing through reinforced openings 92 in the housing 4.
  • Stop means 100 are illustrated in Figs. 1-3.
  • An axially outer portion 102 of the central body portion 22 is provided with an outer surface having a plurality of linear extending surfaces 104 separated by a plurality of cams 106.
  • a sperrad 108 is secured on the flange portion 54 by a plurality of headed threaded bolts (not shown) passing through circumferentially spaced apart openings (not shown) in the flange portion 54 and threadedly secured in the threaded openings 110.
  • the sperrad 108 has an inner surface having a plurality of catches 112.
  • a plurality of pawls 114 are pivotally mounted on pivot studs 116 projecting outwardly from the rear cover plate 12.
  • Resilient means 118 urge a surface 120 of each pawl 114 into contact with the linear surfaces 104 of the cams 106.
  • a radian A passing through the center point of a cam 106 is located behind a radian B passing through the tip of a catch 112 in the direction of rotation of the drums 20.
  • the surface 120 of the pawl 114 is in contact with the cam 106, the distance between the axis of the drum 20 and the tip 115 of the pawl 114 is greater than the distance between the axis of the drum 20 and the tip of the catch 112 as indicated by the dashed lines in Fig. 3 and referred to as the engagement zone.
  • the surface 120 of the pawl 114 moves onto the linear surface 104 so that the distance between the axis of the drum 20 and the tip 115 of the pawl 114 is less than the distance between the axis of the drum 20 and the tip of the catch 112.
  • the cam moves the pawl into the engagement zone at lower than locking speeds and requires the normal action of the spring and pivot pin to pull the pawl out of the engagement zone before the tip of the sperrad catch engages it, thus providing a fail safe feature. This permits the normal extension of the webbing 58 as required by a worker. This is accomplished by the circumferentially spaced apart locations of the cams 106 and the catches 112.
  • the inertial force exerted by the resilient means 118 will be overcome by the force exerted on the pawls 114 by the cams 106 so that the pawls 114 remain extended and will enter into the catches 112 and stop the rotation of the drum. If something should happen to the resilient means 118, the pawls 114 would remain as positioned by the cams 106 so that the pawls 114 would enter into the catches 112 and prevent rotation of the drum 20 and thus provide for a fail safe condition.
  • the portions forming the nozzle 66 are illustrated in Figs. 1, 8 and 9.
  • the nozzle 66 comprises two V-shaped members 122 and 124, having slots 126 and 128 formed therein.
  • the slots 126 and 128 are in alignment to form an opening for the other end 64 of the elongated webbing 58 to pace through.
  • Each of the V-shaped members 122 and 124 are provided with passageways 130 extending therethrough so that headed threaded bolts 132 may be passed through openings 134 in the front 10 and rear 12 cover plates and be secured in threaded openings in studs (not shown) located in the passageways 130 and extending between and in contact with the front and rear cover plates 10 and 12.
  • passageways 138 are formed in each of the V-shaped members 122 and 124 and extend therethrough so that bolts 140 may be passed through openings 142 in the front 10 and rear 12 cover plates and be secured.in threaded openings in studs (not shown) located in the passageways 138 and extending between and in contact with the front and rear cover plates 10 and 12.
  • the one end 62 of the webbing 58 is illustrated in Fig. 10.
  • a portion 150 is folded back on another portion 152 and partially stitched together to form a loop 154.
  • Fig. 11 there is illustrated one embodiment of the invention for securing the one end 62 to the central body portion 22.
  • the central body portion 22 has an inner portion 156 and a spaced apart outer portion 158 so as to form a cavity 160.
  • An opening 162 in the outer portion 158 provides access to the cavity 160.
  • the outer portion 158 has threaded openings 164 for receiving the bolts 52.
  • the loop 154 is placed around the inner portion 156 and the portions 150 and 152 pass through the opening 162 and are then wound around the outer portion 158.
  • a steel spring 166 is located between the outer surface 168 of the outer portion 158 and the first wrap 150 and 152 of the webbing 58 and is used to provide for additional compression of the webbing 58 on the drum 20.
  • the steel spring 166 has a plurality of spaced apart sections 170 in contact with the outer surface 168 and another plurality of spaced apart sections 172 spaced from the outer surface 168.
  • the steel spring 166 has arcuate shaped end portions 174 for securing it to the outer portion 158.
  • the steel spring 166 provides for additional compaction of the layers of the elongated webbing in the event of a fall.
  • a strip of elastomeric material 176 such as foamed rubber or other materials having similar characteristics, is located between the outer surface 168 and the first wrap 150 and 152 and is used to provide for additional compression o the webbing 58 on the drum 20.
  • the strip of elastomeric material 176 provides for additional compaction of the layers of the elongated webbing in the event of a fall.
  • the bearings 30 and 32 are inserted into the central body portion 22.
  • the sperrad 108 is secured to the flange portion 54.
  • the one end 62 of the elongated webbing 58 is secured to the generally cylindrical outer surface 60 and then wound thereon.
  • the annular plate 50 is then secured to the central body portion 22.
  • a portion of the elongated webbing 58 prior to the other portions 70 is located in the slots 126 and 128 and the back cover plate 12 is placed in position.
  • One end of the coiled spring 82 is secured to the nozzle 122 or 124 and the other end 86 is secured in a notch in the central body portion 22.
  • At least one wrap of the coil spring 82 is used to retain the other end 86 in the notch in the central body portion 22.
  • the front cover plate 10 is then positioned on the housing 4 and the various bolts are used to secure the arresting device 2 in an assembled condition.
  • a force is applied to the load supporting member 72 to pull all of the elongated webbing 58 out of the housing 4 and then the spring 82 is used to retract the elongated webbing 58.
  • the handle 90 is secured to a fixed support or a life line (not shown) and the connecting device 70 is secured to the safety harness (not shown) on a worker.
  • the elongated webbing 58 has a length of about twenty-one feet to allow for ordinary movement of the worker. In the event of an accident or other reasons, if the worker starts to fall, a greater force is applied to the connecting device 72 so as to accelerate the rotation of the drum 20. The acceleration of the drum 20 is rapid so that, when five to seven inches of the elongated webbing 58 have passed through the nozzle 66, the pawls 114 have moved into the catcher 112 to prevent rotation of the drum 20.
  • the deceleration force of the fall is then reduced by the fall arresting energy being absorbed by the compaction of the elongated webbing 58 on the drum 20 and, when necessary, the elongation of the portion of the elongated webbing 58 passing through the nozzle 66.
  • the deformation of the steel spring 166 or the elastomeric material 176 will also provide for additional compression of the webbing 58 on the central body portion 22.
  • an external shock absorber such, as that illustrated in United States Patent No. 4,618,026, which is incorporated herein by reference thereto, may be secured to the load supporting device 72.
  • Table 1 Test Parameter ANSI Z359.1 OSHA 1910.66 CSA Z259.2 CEN Test weight (lbs.) 220* 220 220** 220 Free Fall (ft.) 0* 0 2** 2 Freq. Filter (hz.) 100 120* No spec. 60** Cable Extraction (ft.) 3* No spec. 2 2 Allowables: Force (lbf.) 1,800 1,260* 2,700 1,350** Extension (in.) 54 42* 40** 78
  • the ANSI and OSHA are United States requirements; the CSA is Canadian requirements and the CEN is European requirements.
  • a series of tests were conducted using various materials as the webbing 58. The parameters indicated by the single asterisk were used to determine whether or not a material passes a 0 free fall and the parameters indicated by the double asterisks were used to determine whether or not a material passed at 2 feet of free fall. In addition to the test at three feet of initial webbing extraction, tests were conducted at eight, thirteen and eighteen feet of initial webbing extraction.
  • Figs. 14-16 there is illustrated a back pack configuration for attaching the fall arrester 2 to the rear plate of the safety harness illustrated in United States Patent No. 4,712,513 which is incorporated herein by reference thereto or any other similar safety harness.
  • a D-ring 180, Fig. 18, is used instead of the ring illustrated in the '513 patent.
  • a nozzle 182, Fig. 17, comprises two members 184 and 186 which have passageways 188 and 190 similar to the passageways 130 and 128 so that the members 184 and 186 may be secured to the front and rear cover plates 10 and 12 in the same manner as the members 122 and 124.
  • the members 184 and 186 When joined together, the members 184 and 186 have a rectangular portion 192 and a cylindrical portion 194.
  • a recess 196 is formed in the member 184 and a recess 198 is formed in the member 186 so that when the members 184 and 186 are joined together they form a slot for the passageway of the elongated webbing 58.
  • a pivot pin 208 is located in the openings 200 and 204 and another pivot pin 210 is located in the openings 202 and 206.
  • Two spaced apart recesses 212 and 214 are formed in the member 184 and two spaced apart recesses 216 and 218 are formed in the member 186.
  • a locking lever 220 is located in the recesses 212 and 216 and is mounted for pivotal movement on the pivot pin 208 and is urged outwardly by a spring 222 located in recesses (not shown) in the members 184 and 186.
  • Another locking lever 224 is located in recesses 214 and 218 and is mounted for pivotal movement on the pivot pin 210 and is urged outwardly by a spring 226 located in recesses (not shown) in the members 184 and 186.
  • a recess 230 is formed in the member 184 and a plate 232 is located in the recess 230.
  • a portion 234 projects from the plate 232 and is located in a recess in the cylindrical portion 194 and has an arcuate hook portion 236 for purposes described below.
  • the plate 232 has two abutment surfaces 238 and 240.
  • a recess 242 is formed in the member 186 and a plate 244 is located in the recess.
  • a portion 245 of the plate 244 projects from the plate 244 and is located in a recess in the cylindrical portion 194.
  • the plate 244 has two abutment surfaces 246 and 248.
  • the plates 232 and 244 are secured in the recesses 230 and 242 by headed threaded bolts 250 passing through openings in the front and rear cover plates 10 and 12 and secured in threaded openings 252 in studs 254 located in passageways 256 and 258 formed in the members 184 and 186 and in contact with the plates 232 and 244.
  • the D-ring 180 has three straight sides 260, 262 and 264 and an arcuate side 266.
  • a center partition 268 forms a rectangular opening 270 and a circular opening 272 and is thinner than the straight sides 260, 262 and 264 and arcuate side 268.
  • the crossing portions of the harness as illustrated in the '513 patent are located in the rectangular opening 270.
  • the arcuate side 266 is placed under the hook portion 236 and the D-ring 180 is moved over the cylindrical portion 194.
  • the D-ring 180 moves over the cylindrical portion 194, it pushes the locking levers 220 and 224 inwardly.
  • the springs 222 and 226 move the locking levers 220 and 224 outwardly so that the end portions 274 and 276 will be superposed over the straight sides 260 and 264 to prevent the accidental removal of the D-ring 180.
  • Portions of the center partition 268 are in contact with the abutment surfaces 246 and 248.
  • FIG. 19-21 Another preferred embodiment of the invention is illustrated in Figs. 19-21 and is to be used in association with the harness in United States Patent No. 4,712,513 or any other similar safety harness. Portions of the embodiment of Figs. 19-21 are similar to portions of the embodiment illustrated in Figs. 14-18 and have been given the same reference numerals. This embodiment requires a double action to release the D-ring as required for use with double action single locking snap hooks.
  • a pair of spaced apart recesses 280 are formed in the member 186 and a mating pair of spaced apart recesses 282 are formed in the member 184.
  • Inverted L-shaped metal plates 284 are located in the recesses 280 and 282.
  • the pivot pins 206 and 208 pass through openings in the inverted L-shaped metal plates 284.
  • Threaded metal bolts 286 pass through passageways in the members 184 and 186 and are threaded into opposite ends of a common threaded nut 288.
  • Resilient means 290 are provided for urging the portions 260 and 264 of the D-ring 180 into the locking levers 220 and 224 or for maintaining the locking levers in a retracted position.
  • a sleeve having a generally cylindrical portion 292 and a flange portion 294 is mounted for sliding movement over the cylindrical portion 194 of the members 184 and 186.
  • a coiled spring 295 has a first coil 296 secured by a press fit to the cylindrical portion 194 and a second coil 298 secured by a press fit to the cylindrical portion 292. Under normal conditions, the coiled spring 195 will hold the cylindrical portion 292 at a location to hold the locking levers 220 and 224 in a retracted position as illustrated in Fig. 20 wherein the D-ring has been moved into contact with the flange portion 294.
  • a force is applied to the portions 260 and 264 of the D-ring 180 to move them over a portion of the cylindrical portion 194 and moved into contact with the flange portion 294.
  • Continued movement of the portions 260 and 264 compresses the coiled spring 295 and the movement of the portions 260 and 264 is continued until the locking levers 220 and 224 are urged outwardly by the springs 222 and 226.
  • Outward movement of the locking levers 220 and 224 is halted when portions thereof contact abutment surfaces 300 and 302.
  • the force is removed from the portions 260 and 264 and the coiled spring 295 urges the portions 260 and 264 in contact with the locking levers 220 and 224.
EP95109474A 1994-06-17 1995-06-19 Dispositif et procédé d'arrêt de chute Withdrawn EP0687482A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26146094A 1994-06-17 1994-06-17
US261460 1994-06-17

Publications (2)

Publication Number Publication Date
EP0687482A2 true EP0687482A2 (fr) 1995-12-20
EP0687482A3 EP0687482A3 (fr) 1996-07-24

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ID=22993405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109474A Withdrawn EP0687482A3 (fr) 1994-06-17 1995-06-19 Dispositif et procédé d'arrêt de chute

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EP (1) EP0687482A3 (fr)
CA (1) CA2152025A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1034813A2 (fr) * 1999-03-10 2000-09-13 Sarl P.M.T.L. Rambarde de sécurité
EP1034814A1 (fr) * 1999-03-10 2000-09-13 Sarl P.M.T.L. Dispositif de sécurité pour travail en hauteur
FR2791077A1 (fr) * 1999-12-17 2000-09-22 P M T L Plate-forme de travail en hauteur
GB2432141A (en) * 2005-11-15 2007-05-16 Latchways Plc A safety device for a fall arrest system
GB2543366A (en) * 2015-10-12 2017-04-19 Swisslogo Ag Self-Braking Pulley
JP2019076372A (ja) * 2017-10-24 2019-05-23 サンコー株式会社 安全帯のストラップ巻取装置
US20200078621A1 (en) * 2018-09-11 2020-03-12 Yoke Industrial Corp. Fall arrest device
WO2022204457A1 (fr) * 2021-03-26 2022-09-29 Msa Technology, Llc Moyeu polymère de verrouillage en deux parties pour dispositif d'autorétraction de câble

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712513A (en) 1985-04-22 1987-12-15 Gebr. Wahlefeld Gmbh & Co. Kg Suspension harness

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US2546202A (en) * 1938-04-02 1951-03-27 Trouin Joseph Apparatus for protection against falls into space
GB851981A (en) * 1958-01-22 1960-10-19 Sala Maskinfabriks Aktiebolag Improvements in safety blocks
FR1270109A (fr) * 1960-07-15 1961-08-25 Appareil de sécurité antichute
GB999552A (en) * 1962-03-30 1965-07-28 Joseph Trouin Safety apparatus
GB1552667A (en) * 1977-10-07 1979-09-19 Barrow Hepburn Equip Ltd Self winding drum
FR2631615B1 (fr) * 1988-05-20 1991-07-12 Froment Sa Enrouleur de courroie a systeme anti-vrillage
US4877110A (en) * 1988-10-14 1989-10-31 D B Industries, Inc. Safety device with retractable lifeline

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712513A (en) 1985-04-22 1987-12-15 Gebr. Wahlefeld Gmbh & Co. Kg Suspension harness

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1034813A2 (fr) * 1999-03-10 2000-09-13 Sarl P.M.T.L. Rambarde de sécurité
EP1034814A1 (fr) * 1999-03-10 2000-09-13 Sarl P.M.T.L. Dispositif de sécurité pour travail en hauteur
FR2790672A1 (fr) * 1999-03-10 2000-09-15 P M T L Dispositif de securite pour travail en hauteur et plate-forme de travail en hauteur equipee de ce dernier
EP1034813A3 (fr) * 1999-03-10 2000-09-27 Sarl P.M.T.L. Rambarde de sécurité
FR2791077A1 (fr) * 1999-12-17 2000-09-22 P M T L Plate-forme de travail en hauteur
GB2432141A (en) * 2005-11-15 2007-05-16 Latchways Plc A safety device for a fall arrest system
GB2432141B (en) * 2005-11-15 2010-06-16 Latchways Plc Safety Block
GB2543366A (en) * 2015-10-12 2017-04-19 Swisslogo Ag Self-Braking Pulley
JP2019076372A (ja) * 2017-10-24 2019-05-23 サンコー株式会社 安全帯のストラップ巻取装置
US20200078621A1 (en) * 2018-09-11 2020-03-12 Yoke Industrial Corp. Fall arrest device
US10960243B2 (en) * 2018-09-11 2021-03-30 Yoke Industrial Corp. Fall arrest device
WO2022204457A1 (fr) * 2021-03-26 2022-09-29 Msa Technology, Llc Moyeu polymère de verrouillage en deux parties pour dispositif d'autorétraction de câble

Also Published As

Publication number Publication date
EP0687482A3 (fr) 1996-07-24
CA2152025A1 (fr) 1995-12-18

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