FR2637505A1 - Tensioner for tethers for belts for working on masts - Google Patents

Tensioner for tethers for belts for working on masts Download PDF

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Publication number
FR2637505A1
FR2637505A1 FR8813437A FR8813437A FR2637505A1 FR 2637505 A1 FR2637505 A1 FR 2637505A1 FR 8813437 A FR8813437 A FR 8813437A FR 8813437 A FR8813437 A FR 8813437A FR 2637505 A1 FR2637505 A1 FR 2637505A1
Authority
FR
France
Prior art keywords
lanyard
branch
tensioner
brake
handle
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.)
Granted
Application number
FR8813437A
Other languages
French (fr)
Other versions
FR2637505B1 (en
Inventor
Robert Pest
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.)
Komet
Original Assignee
Komet
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Filing date
Publication date
Application filed by Komet filed Critical Komet
Priority to FR8813437A priority Critical patent/FR2637505B1/en
Publication of FR2637505A1 publication Critical patent/FR2637505A1/en
Application granted granted Critical
Publication of FR2637505B1 publication Critical patent/FR2637505B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope
    • 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
    • A62B35/0006—Harnesses; Accessories therefor
    • A62B35/0025—Details and accessories
    • A62B35/0037—Attachments for lifelines and lanyards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/10—Quick-acting fastenings; Clamps holding in one direction only
    • F16G11/101—Quick-acting fastenings; Clamps holding in one direction only deforming the cable by moving a part of the fastener
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/10—Quick-acting fastenings; Clamps holding in one direction only
    • F16G11/105—Clamps holding in one direction only
    • F16G11/106—Clamps holding in one direction only using a toothed surface

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)

Abstract

Tensioner for tethers for belts for working on masts, of the type comprising a small bar 9 and a handle 14 formed by a U-shaped body, a connecting rod 10, an articulated parallelogram, the connecting rod 10 comprising a branch 10b extending towards the bottom of the plate 5 of the body, in order to form a brake intended to wedge a tether 34 passing through the body 1 by clamping it against the bottom of the plate 5, elastic means 17 being provided to tension the brake in the closed direction, characterised in that the small bar 9 comprises a branch 9b extending in the body 1 and arranged so that any movement of the handle 14 beyond a position in which the brake is separated from the tether 34 forces the said branch 9b to bear against the tether 34 in order to wedge it against the bottom of the plate 5 of the body 1.

Description

La présente invention vise un tendeur de longes pour ceintures de travail sur des poteaux
On connalt de tels tendeurs qui comprennent un corps dans lequel coulisse la longe, un frein bloquant la longe dans le corps et une poignée pour agir sur le frein afin de rendre libre le coulissement de la longe.The present invention relates to a lanyard tensioner for work belts on posts
Such tensioners are known which comprise a body in which the lanyard slides, a brake blocking the lanyard in the body and a handle for acting on the brake in order to make the sliding of the lanyard free.

Dans de tels dispositifs, l'une des extrémités de la longe est fixée à une ceinture portée par un ouvrier travaillant le long d'un poteau télégraphique ou électrique, ladite longe formant une boucle pour passer derrière le poteau et le tendeur monté sur la longe étant par un anneau relié à la ceinture, ledit anneau étant monté de manière que lorsqu'une traction est exercée le frein bloque la longe. In such devices, one end of the lanyard is attached to a belt worn by a worker working along a telegraph or electric pole, said lanyard forming a loop to pass behind the pole and the tensioner mounted on the lanyard being by a ring connected to the belt, said ring being mounted so that when traction is exerted the brake blocks the lanyard.

Au cours des travaux, l'ouvrier doit pouvoir s'approcher ou s'écarter du poteau de sorte qu'il doit agir sur la poignée afin de libérer la longe. On a constaté à de nombreuses reprises que si l'ouvrier, au moment où il libère la longe, continue à exercer une traction sur la boucle formée par la longe autour du poteau, qu'il était en perte d'équilibre et que sa première réaction était de serrer la poignée du tendeur, ce qui bien entendu est une erreur puisque seul le relâchement de cette dernière engendre le blocage de la longe. During the work, the worker must be able to approach or move away from the post so that he must act on the handle in order to release the lanyard. It has been observed on numerous occasions that if the worker, when he releases the lanyard, continues to exert traction on the loop formed by the lanyard around the post, that he is losing his balance and that his first reaction was to tighten the handle of the tensioner, which of course is an error since only the release of the latter causes the blocking of the lanyard.

L'un des buts de la présente invention est de réaliser un tendeur qui offre une grande sécurité et qui évite les inconvénients de la technigue antérieure. One of the aims of the present invention is to provide a tensioner which offers great security and which avoids the drawbacks of the prior art.

Le tendeur, selon l'invention est du type comprenant un corps en forme de U avec deux ailes et une ame, une biellette articulée par une extrémité sur un axe porté par les ailes du corps et par son autre extrémité sur un axe d'une poignée, une barrette articulée sur un axe porté par les ailes dudit corps et par son autre extrémité sur un axe de ladite poignée de manière que l'ensemble forme un parallélogramme articulé, la biellette comportant une branche s'étendant en direction du fond de l'ame du corps pour former un frein destiné à coincer une longe traversant le corps en enserrant celle-ci contre le fond de blâme, des moyens élastiques étant prévus pour tendre la branche à s'appliquer contre la longe et un anneau étant relié à l'un des éléments du parallélogramme et destiné à être fixé à la ceinture et monté de manière qu'une traction effectuée sur ledit anneau tende à serrer le frein et est caractérisé en ce que la barrette comporte une branche s'étendant dans le corps et disposée de manière que tout déplacement de la poignée au-delà d'une position dans laquelle le frein est écarté de la longe force ladite branche à porter contre la longe pour la coincer contre le fond de blâme du corps. The tensioner according to the invention is of the type comprising a U-shaped body with two wings and a core, a link articulated by one end on an axis carried by the wings of the body and by its other end on an axis of a handle, a bar articulated on an axis carried by the wings of said body and by its other end on an axis of said handle so that the assembly forms an articulated parallelogram, the rod comprising a branch extending towards the bottom of the core of the body to form a brake intended to wedge a lanyard passing through the body by enclosing it against the bottom of the reprimand, elastic means being provided for tensioning the branch to be applied against the lanyard and a ring being connected to the '' one of the elements of the parallelogram and intended to be fixed to the belt and mounted so that a pull carried out on said ring tends to apply the brake and is characterized in that the bar comprises a branch he extending in the body and arranged so that any movement of the handle beyond a position in which the brake is moved away from the lanyard forces said branch to be carried against the lanyard to wedge it against the background of blame of the body.

Grâce à une telle disposition on réalise un tendeur présentant une grande sécurité puisque si ouvrier serre la poignée la longe est bloquée dans le corps.Thanks to such an arrangement, a tensioner is produced which is very secure since if the worker tightens the handle, the lanyard is locked in the body.

Suivant une caractéristique constructive, la branche de le barrette s'étend sensiblement perpendiculairement à ladite barrette en direction du frein et l'anneau comporte une patte percée d'un trou qui est traversé par l'axe sur lequel s'articule la barrette sur la poignée.  According to a constructive characteristic, the branch of the bar extends substantially perpendicular to said bar in the direction of the brake and the ring comprises a tab pierced with a hole which is crossed by the axis on which the bar is articulated on the handle.

L'invention va maintenant etre décrite avec plus de détails en se référant à un mode de réalisation particulier donné à titre d'exemple seulement et représenté aux dessins annexés, dans lesquels
Figure 1 est une ~vue en perspective d'un tendeur automatique, selon l'invention.The invention will now be described in more detail with reference to a particular embodiment given by way of example only and shown in the accompanying drawings, in which
Figure 1 is a perspective view of an automatic tensioner according to the invention.

Figure 2 est une vue en plan du tendeur de la figure 1. Figure 2 is a plan view of the tensioner of Figure 1.

Figure 3 est une vue en coupe suivant la ligne III-III de la figure 2 montrant le tendeur, selon l'invention, en fonctionnement. Figure 3 is a sectional view along line III-III of Figure 2 showing the tensioner according to the invention, in operation.

Figure 4 est une vue en coupe montrant le tendeur dans une position dans laquelle il libère la longe. Figure 4 is a sectional view showing the tensioner in a position in which it releases the lanyard.

Figure 5 est une vue en coupe montrant le tendeur en position de sécurité. Figure 5 is a sectional view showing the tensioner in the safety position.

Le tendeur représenté aux différentes figures comprend un corps 1 à section en U présentant deux ailes 3 et 4 et une âme 5, cette dernière sur sa surface intérieure comportant des crans 6.  The tensioner shown in the various figures comprises a body 1 with a U-section having two wings 3 and 4 and a core 5, the latter on its inner surface comprising notches 6.

Les ailes 3 et 4 supportent des axes 7 et 8 sur - lesquels sont articulées respectivement une paire de barrettes 9 et quatre biellettes 10. The wings 3 and 4 support axes 7 and 8 on which are respectively hinged a pair of bars 9 and four links 10.

Les biellettes 10 sont empilées les unes sur les autres et présentent une branche rectiligne 10a et un prolongement arqué lOb dont le bord tourné vers le fond de l'amie 5 est pourvu de crans 12, la branche 1Qb constituant un frein. The rods 10 are stacked on each other and have a straight branch 10a and an arcuate extension 10b whose edge facing the bottom of the friend 5 is provided with notches 12, the branch 1Qb constituting a brake.

La branche rectiligne 10a des biellettes 10 est traversée par un axe 13 solidaire des joues 15 d'une poignée 14 sensiblement à section en U, un ressort 17 étant enroulé sur l'axe 13 et présentant une extrémité 18 butant contre le fond de ladite poignée et une extrémité 19 portant sur les biellettes 10 de manière à tendre à rapprocher les crans 12 de l'âme 5. The rectilinear branch 10a of the rods 10 is crossed by an axis 13 integral with the cheeks 15 of a handle 14 substantially of U-section, a spring 17 being wound on the axis 13 and having an end 18 abutting against the bottom of said handle and one end 19 bearing on the rods 10 so as to tend to bring the notches 12 closer to the core 5.

Les deux autres barrettes 9 présentent deux branches 9a et 9b qui forment un coude entre elles, la bran che 9a étant traversée par un axe 21 solidaire des joues 15 de la poignée 14, ledit axe 21 traversant librement un trou 24 d'une patte 23 solidaire d'un anneau 22, ladite patte étant inserée entre les deux barrettes 9. The other two bars 9 have two branches 9a and 9b which form an elbow between them, the branch 9a being crossed by an axis 21 integral with the cheeks 15 of the handle 14, said axis 21 freely passing through a hole 24 of a tab 23 integral with a ring 22, said tab being inserted between the two bars 9.

Les branches 9b s'étendent en direction du prolongement 10b et sont reliées par un rivet 26 au voisinage de leur extrémité libre. The branches 9b extend in the direction of the extension 10b and are connected by a rivet 26 in the vicinity of their free end.

Le tendeur, selon l'invention, est destiné à être utilisé avec un ensemble comprenant une ceinture 30 destinée à être portée par un ouvrier travaillant, par exemple, le long d'un poteau électrique ou télégraphique, la ceinture comportant deux anneaux 31 et 32, l'anneau 31 étant destiné à recevoir un mousqueton 33 d'une extrémité d'une longe 34 passant derrière le poteau et sur laquelle est monté le tendeur, selon l'invention, l'anneau 22 étant relié par un anneau ouvrable 35 à l'anneau 32. The tensioner according to the invention is intended to be used with an assembly comprising a belt 30 intended to be worn by a worker working, for example, along an electric or telegraph pole, the belt comprising two rings 31 and 32 , the ring 31 being intended to receive a carabiner 33 of one end of a lanyard 34 passing behind the post and on which the tensioner is mounted, according to the invention, the ring 22 being connected by an openable ring 35 to the ring 32.

On remarquera que la poignée 14 les barrettes 9 et 10 et le corps 1 forment un parallélogramme articulé et que la distance séparant la branche 9b du fond de l'amie 5 est supérieure à la distance séparant le frein du fond de l'âme 5. It will be noted that the handle 14, the bars 9 and 10 and the body 1 form an articulated parallelogram and that the distance separating the branch 9b from the bottom of the friend 5 is greater than the distance separating the brake from the bottom of the core 5.

Comme on le voit à la figure 3 en position normale d'utilisation l'anneau 22 est tiré dans le sens de la flèche f de sorte que la longe 34 se trouve enserrée entre les crans 6 et les crans 12 du frein et ne peut par conséquent glisser, le tendeur étant ainsi solidarisé à la longe 34. As seen in Figure 3 in the normal position of use the ring 22 is pulled in the direction of the arrow f so that the lanyard 34 is clamped between the notches 6 and the notches 12 of the brake and can not Consequently, the tensioner is thus secured to the lanyard 34.

Lorsque l'ouvrier veut raccourcir la boucle formée par la longe 34, il appuie sur la poignée 14 (voir figure 4) le frein s'éloigne du fond de l'âme 5 et la longe peut coulisser librement. When the worker wants to shorten the loop formed by the lanyard 34, he presses the handle 14 (see Figure 4) the brake moves away from the bottom of the core 5 and the lanyard can slide freely.

On sait par expérience que, si l'ouvrier maintient son poids en arrière, la boucle formée par la longe s'agrandit puisque celle-ci passe derrière le poteau et que l'ouvrier risque de tomber. Le premier réflexe de l'ouvrier est de serrer le tendeur ce qui dans la technique antérieure ne produit aucun freinage, de sorte, que les risques d'accidents sont important.  We know from experience that, if the worker keeps his weight back, the loop formed by the lanyard becomes larger since it goes behind the post and the worker risks falling. The first reflex of the worker is to tighten the tensioner which in the prior art produces no braking, so that the risk of accidents is important.

Comme on le voit à la figure 5, le fait de serrer le tendeur amène le basculement de la branche 9b dans une position dans laquelle le rivet 25 prend appui sur la longe 34 et ainsi serre celle-ci contre le fond de l'âme 5 de sorte que le tendeur se bloque sur ladite longe 34. As can be seen in FIG. 5, the fact of tightening the tensioner brings about the tilting of the branch 9b in a position in which the rivet 25 bears on the lanyard 34 and thus clamps the latter against the bottom of the core 5 so that the tensioner is blocked on said lanyard 34.

Lorsque le tendeur est relâché, par l'action du ressort 17, la poignée 14 revient dans sa position initiale (Figure 3) le frein assurant le blocage sur la longe. When the tensioner is released, by the action of the spring 17, the handle 14 returns to its initial position (Figure 3), the brake ensuring the blocking on the lanyard.

On conçoit que le tendeur, selon l'invention, est particulièrement intéressant et qu'il permet d'éviter un grand nombre d'accidents. It will be appreciated that the tensioner according to the invention is particularly advantageous and that it makes it possible to avoid a large number of accidents.

Bien entendu, l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit et représenté. On pourra y apporter de nombreuses modifications de détail sans sortir pour cela du cadre de l'invention.  Of course, the invention is not limited to the embodiment which has just been described and shown. Many detailed modifications can be made without departing from the scope of the invention.

Claims (2)

REVENDICATIONS U avec deux ailes (3-4) et une âme (5), une biellette (10) articulée par une extrémité sur un axe (8) porté par les ailes du corps et par son autre extrémité sur un axe (13) d'une poignée (14) une barrette (9) articulée sur un axe (7) porté par les ailes dudit corps (1) et par son autre extrémité sur un axe (21) de ladite poignée (14) de manière que l'ensemble forme un parallélogramme articulé , la biellette (10) comportant une branche (lOb) s'étendant en direction du fond de l'âme (5) du corps pour former un frein destiné à coincer une longe (34) traversant le corps (1) en enserrant celle-ci contre le fond de l'âme (5), des moyens élastiques (17) étant prévus pour tendre la branche (lobs à s'appliquer contre la longe (34) et un anneau (22) étant relié à l'un des éléments du parallélogramme et destiné à être fixé à la ceinture et monté de manière qu'une traction effectuée sur ledit anneau (22) tende à serrer le frein caractérisé en ce que la barrette (9) comporte une branche (9b) s'étendant dans le corps (1) et disposée de manière que tout déplacement de la poignée (14) au-delà d'une position dans laquelle le frein est écarté de la longe (34) force ladite branche (9b) à porter contre la longe (34) pour la coincer contre le fond de l'âme (5) du corps (1).CLAIMS U with two wings (3-4) and a core (5), a link (10) articulated by one end on an axis (8) carried by the wings of the body and by its other end on an axis (13) d '' a handle (14) a bar (9) articulated on an axis (7) carried by the wings of said body (1) and by its other end on an axis (21) of said handle (14) so that the assembly forms an articulated parallelogram, the link (10) comprising a branch (10b) extending towards the bottom of the core (5) of the body to form a brake intended to wedge a lanyard (34) passing through the body (1) by enclosing it against the bottom of the core (5), elastic means (17) being provided for tensioning the branch (lobs to be applied against the lanyard (34) and a ring (22) being connected to the '' one of the elements of the parallelogram and intended to be fixed to the belt and mounted so that a pull made on said ring (22) tends to apply the brake characterized in that the bar (9) comprises a branch (9b) extending in the body (1) and arranged so that any movement of the handle (14) beyond a position in which the brake is removed from the lanyard (34) forces said branch (9b) to bear against the lanyard (34) to wedge it against the bottom of the core (5) of the body (1). 1 - Tendeur de longes pour ceintures de travail sur des poteaux du type comprenant un corps en forme de 1 - Lanyard tensioner for work belts on posts of the type comprising a body in the form of 2"- Tendeur de longes pour ceintures de travail sur des poteaux, selon la revendication 1, caractérisé en ce que la branche (9b) de la barrette (9) s'étend sensiblement perpendiculairement à ladite barrette en direction du frein et l'anneau (22) comporte une patte (23) percée d'un trou (24) qui est traversé par l'âne (21) sur lequel s'articule la barrette t9} sur la poignée (14).  2 "- Lanyard tensioner for work belts on posts, according to claim 1, characterized in that the branch (9b) of the bar (9) extends substantially perpendicular to said bar in the direction of the brake and the ring (22) has a tab (23) pierced with a hole (24) which is crossed by the donkey (21) on which the t9} bar is articulated on the handle (14).
FR8813437A 1988-10-12 1988-10-12 LANYARD TENSIONER FOR WORKING BELTS ON POSTS Expired - Fee Related FR2637505B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8813437A FR2637505B1 (en) 1988-10-12 1988-10-12 LANYARD TENSIONER FOR WORKING BELTS ON POSTS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8813437A FR2637505B1 (en) 1988-10-12 1988-10-12 LANYARD TENSIONER FOR WORKING BELTS ON POSTS

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FR2637505A1 true FR2637505A1 (en) 1990-04-13
FR2637505B1 FR2637505B1 (en) 1990-12-07

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FR8813437A Expired - Fee Related FR2637505B1 (en) 1988-10-12 1988-10-12 LANYARD TENSIONER FOR WORKING BELTS ON POSTS

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0561682A1 (en) * 1992-03-18 1993-09-22 Komet Security apparatus for workers working at high places
WO1998058703A1 (en) * 1997-06-20 1998-12-30 Tankersafe Limited Fall prevention system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1243059A (en) * 1959-10-29 1960-10-07 Self-tightening pliers for safety devices
DE1092353B (en) * 1958-07-29 1960-11-03 Walter Steinhagen Safety belt for climbing power poles
FR1419011A (en) * 1964-10-16 1965-11-26 Aerazur Quick-adjust tensioner, for mooring rope
EP0004328A1 (en) * 1978-03-20 1979-10-03 Mittelmann & Co., Armaturenwerk Cable safety grip
FR2437843A1 (en) * 1978-10-04 1980-04-30 Koch Albert Safety unit for working at heights - has automatic set of cord clamping rings and manually operated set to give double safety action
US4560029A (en) * 1984-08-29 1985-12-24 Wgm Safety Corp. Security device
DE3531391A1 (en) * 1985-09-03 1987-03-12 Bornack Herbert Fa Fall brake

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1092353B (en) * 1958-07-29 1960-11-03 Walter Steinhagen Safety belt for climbing power poles
FR1243059A (en) * 1959-10-29 1960-10-07 Self-tightening pliers for safety devices
FR1419011A (en) * 1964-10-16 1965-11-26 Aerazur Quick-adjust tensioner, for mooring rope
EP0004328A1 (en) * 1978-03-20 1979-10-03 Mittelmann & Co., Armaturenwerk Cable safety grip
FR2437843A1 (en) * 1978-10-04 1980-04-30 Koch Albert Safety unit for working at heights - has automatic set of cord clamping rings and manually operated set to give double safety action
US4560029A (en) * 1984-08-29 1985-12-24 Wgm Safety Corp. Security device
DE3531391A1 (en) * 1985-09-03 1987-03-12 Bornack Herbert Fa Fall brake

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0561682A1 (en) * 1992-03-18 1993-09-22 Komet Security apparatus for workers working at high places
FR2688815A1 (en) * 1992-03-18 1993-09-24 Komet IMPROVEMENTS IN SAFETY DEVICES FOR WORKERS WORKING IN HIGH AREAS.
US5323873A (en) * 1992-03-18 1994-06-28 Societe Anonyme Dite: Komet Safety device
WO1998058703A1 (en) * 1997-06-20 1998-12-30 Tankersafe Limited Fall prevention system
GB2326327B (en) * 1997-06-20 2001-10-17 Millennium Safety Ltd Fall prevention system
US6374945B1 (en) * 1997-06-20 2002-04-23 Tankersafe Limited Et Al. Fall prevention system

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Publication number Publication date
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