EP1312391A1 - Method for obtaining an "eight descender" for mountaineering and an "eight descender" obtained thereby - Google Patents

Method for obtaining an "eight descender" for mountaineering and an "eight descender" obtained thereby Download PDF

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Publication number
EP1312391A1
EP1312391A1 EP02354172A EP02354172A EP1312391A1 EP 1312391 A1 EP1312391 A1 EP 1312391A1 EP 02354172 A EP02354172 A EP 02354172A EP 02354172 A EP02354172 A EP 02354172A EP 1312391 A1 EP1312391 A1 EP 1312391A1
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Prior art keywords
descender
obtaining
section
intended
profile
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EP02354172A
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German (de)
French (fr)
Inventor
Bernard Contat
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Contat Freres Ets
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Contat Freres Ets
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    • 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
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B29/00—Apparatus for mountaineering
    • A63B29/02—Mountain guy-ropes or accessories, e.g. avalanche ropes; Means for indicating the location of accidentally buried, e.g. snow-buried, persons

Definitions

  • the present invention relates to a method for obtaining a descender 8 intended for belaying and abseiling of a mountaineer with all types of ropes.
  • Descenders 8 are known and consist of a part metallic forming two successive recessed zones linked together by a thinned area. With such a climbing piece, the user hangs his rope on it to form a braking loop by passing its rope through one zones hollowed out in one direction, and making it pass in this same zone hollowed out after passing said rope behind the shoulders formed by the thinned zone, the second hollowed out zone being intended for the attachment of a carabiner placed at the end of a connecting rope attached to the mountaineer.
  • Such a descender 8 which is generally metallic, steel or preferably aluminum, is carried out by forging a blank or by molding or machining.
  • the object of the present invention is to remedy these drawbacks and relates, for this purpose, to a method of obtaining a descender 8 intended for belaying and abseiling a mountaineer with all types of ropes and consisting of two successive recessed zones linked together by a zone thinned, said return cord being formed in a loop to cross one areas hollowed out in one direction and hang in an opposite direction behind the shoulders formed by the thinned zone, the second hollowed-out zone being intended for hanging a carabiner at the end of a rope binding fixed to the mountaineer, characterized in that it consists in deforming a portion of metal profile to give it its final configuration having roughly shaped like an 8.
  • the method comprises the following successive steps:
  • a straight portion of profile in a threadlike metal profile of length corresponding to that of developed from the descender to be obtained.
  • the straight section portion is deformed, to give it the final 8 shape.
  • the invention also relates to the descender obtained with the method of the invention.
  • Figure 1 illustrates a traditional descender 8, as part of its use.
  • Figure 2 illustrates the first step in the process.
  • FIGS 3a, 3b illustrate the second step of the process.
  • Figure 4 illustrates an additional step in the process.
  • Figure 5 is a view similar to Figure 4, showing a variant execution.
  • Figure 6 is an alternative embodiment.
  • FIG. 7 shows the descender according to the invention in progress use.
  • a descender 8 bearing the general reference (1), consists of a flat metal piece forming two hollowed out areas successive (2) and (3) connected together by a thinned zone (4) so as to allow the return rope (5) to be formed in a loop (6) to cross one of the recessed areas (3) in one direction and be ironed there in another direction after having passed behind the shoulders (4a, 4b) formed by the zone thinned (4), that is to say behind the second hollowed-out zone (2) which is, by elsewhere, intended for the attachment of a carabiner (7) disposed at the end of a connecting cord (8) fixed to the user as, for example, to his harness.
  • the method for obtaining such a descender 8 is characterized in that it is shaped from a portion of a profile metallic.
  • the production process consists in deforming a portion of metal profile to give it its final configuration having substantially the shape of an 8, consisting of two recessed zones adjacent (2, 3).
  • the descender 8 (1) thus formed comprises two hollowed out areas (2, 3) of different dimensions, namely, a first area hollowed out (3) and a second hollowed out area (2).
  • the first area (3) is dimensions larger than the second zone (2) and is intended for passage strands (5a, 5b) of the rope (3), while the latter goes in a loop behind said second zone (2), the latter being intended for attachment a carabiner (7) as shown in Figure 7.
  • the assembly of the end planes (11, 12) of the descender 8 (1) is carried out by a welding operation (13), figure 4.
  • the assembly of the end planes (11, 12) of the descender 8 (1) is carried out by means of an attached mechanical connecting part (14).
  • the material in which the descender 8 is made from the thread profile is aluminum.
  • the preference given to this material is due to its great lightness and its great resistance.
  • the metal profile (10) from which is made the descender 8 is of circular section (15).
  • the circular section is preferred for its sliding qualities.
  • the two hollow areas (2, 3) of the descender 8 are separated at the level of the thinning (4) that they form, by means of a separating element (16).
  • This intermediate separation element (16) is intended to receive a product referencing marking, it can also be used for marking of a standard or any other indication.
  • the intermediate partition (16) is fixed so permanent or removable on the descender proper by any means, such as welding, screwing, clipping, riveting etc.

Abstract

The method for obtaining a figure eight descender constituted by two successive hollowed zones (2,3) connected together by a thin zone (4) consists of deforming a metal section portion to give it its final figure of eight shape. Firstly a straight section is cut in a filiform section of length corresponding to that of the descender. The straight portion is deformed to give it its figure of eight shape and then the descender ends are assembled.

Description

La présente invention concerne un procédé d'obtention d'un descendeur 8 destiné à l'assurage et à la descente en rappel d'un alpiniste avec tous types de cordes.The present invention relates to a method for obtaining a descender 8 intended for belaying and abseiling of a mountaineer with all types of ropes.

Les descendeurs 8 sont connus et sont constitués par une pièce métallique formant deux zones évidées successives reliées entre elles par une zone amincie. Avec une telle pièce d'escalade, l'utilisateur y accroche sa corde de rappel pour former une boucle de freinage en passant sa corde dans l'une des zones évidées dans un sens, et la faisant repasser dans cette même zone évidée après avoir fait passer ladite corde derrière les épaulements formés par la zone amincie, la deuxième zone évidée étant destinée à l'accrochage d'un mousqueton disposé à l'extrémité d'une corde de liaison fixée à l'alpiniste.Descenders 8 are known and consist of a part metallic forming two successive recessed zones linked together by a thinned area. With such a climbing piece, the user hangs his rope on it to form a braking loop by passing its rope through one zones hollowed out in one direction, and making it pass in this same zone hollowed out after passing said rope behind the shoulders formed by the thinned zone, the second hollowed out zone being intended for the attachment of a carabiner placed at the end of a connecting rope attached to the mountaineer.

La réalisation d'un tel descendeur 8, qui est généralement métallique, en acier ou préférentiellement en aluminium, est effectuée par forgeage d'une pièce brute ou encore par moulage, ou usinage.The making of such a descender 8, which is generally metallic, steel or preferably aluminum, is carried out by forging a blank or by molding or machining.

Ceci nécessite une technique longue et onéreuse car mettant en oeuvre des machines importantes et sophistiquées.This requires a long and expensive technique because using large and sophisticated machines.

De plus, on observe dans ce type de procédé d'importants déchets de matières. In addition, in this type of process, significant waste of materials.

La présente invention a pour but de remédier à ces inconvénients et concerne, à cet effet, un procédé d'obtention d'un descendeur 8 destiné à l'assurage et la descente en rappel d'un alpiniste avec tous types de cordes et constitué par deux zones évidées successives reliées entre elles par une zone amincie, ladite corde de rappel étant formée en boucle pour traverser l'une des zones évidées dans un sens et s'accrocher dans un sens opposé derrière les épaulements formés par la zone amincie, la deuxième zone évidée étant destinée à l'accrochage d'un mousqueton disposé à l'extrémité d'une corde de liaison fixée à l'alpiniste, caractérisé en ce qu'il consiste à déformer une portion de profilé métallique pour lui donner sa configuration finale ayant sensiblement la forme d'un 8.The object of the present invention is to remedy these drawbacks and relates, for this purpose, to a method of obtaining a descender 8 intended for belaying and abseiling a mountaineer with all types of ropes and consisting of two successive recessed zones linked together by a zone thinned, said return cord being formed in a loop to cross one areas hollowed out in one direction and hang in an opposite direction behind the shoulders formed by the thinned zone, the second hollowed-out zone being intended for hanging a carabiner at the end of a rope binding fixed to the mountaineer, characterized in that it consists in deforming a portion of metal profile to give it its final configuration having roughly shaped like an 8.

Ainsi, le procédé comprend les étapes successives suivantes :Thus, the method comprises the following successive steps:

Dans une première étape, on découpe d'une portion droite de profilé dans un profilé métallique filiforme, de longueur correspondant à celle du développé du descendeur à obtenir.In a first step, we cut a straight portion of profile in a threadlike metal profile, of length corresponding to that of developed from the descender to be obtained.

Dans une deuxième étape, on déforme la portion droite de profilé, pour lui donner la conformation finale en forme de 8.In a second step, the straight section portion is deformed, to give it the final 8 shape.

Dans une étape complémentaire, on procède à l'assemblage desdits plans des extrémités du descendeur 8.In an additional step, we proceed to the assembly of said descender end plans 8.

L'invention concerne aussi le descendeur obtenu avec le procédé de l'invention. The invention also relates to the descender obtained with the method of the invention.

D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre, en regard des dessins annexés, qui ne sont donnés qu'à titre d'exemples non limitatifs.Other characteristics and advantages of the invention will emerge from the description which will follow, with reference to the appended drawings, which are not given only by way of nonlimiting examples.

La figure 1 illustre un descendeur 8 traditionnel, dans le cadre de son utilisation.Figure 1 illustrates a traditional descender 8, as part of its use.

La figure 2 illustre la première étape du procédé.Figure 2 illustrates the first step in the process.

Les figures 3a, 3b illustrent la deuxième étape du procédé.Figures 3a, 3b illustrate the second step of the process.

La figure 4 illustre une étape complémentaire du procédé.Figure 4 illustrates an additional step in the process.

La figure 5 est une vue similaire à la figure 4, montrant une variante d'exécution.Figure 5 is a view similar to Figure 4, showing a variant execution.

La figure 6 est une variante de réalisation.Figure 6 is an alternative embodiment.

La figure 7 montre le descendeur selon l'invention en cours d'utilisation.FIG. 7 shows the descender according to the invention in progress use.

De manière connue, un descendeur 8, portant la référence générale (1), est constitué par une pièce métallique plate formant deux zones évidées successives (2) et (3) reliées entre elles par une zone amincie (4) de manière à permettre à la corde de rappel (5) d'être formée en boucle (6) pour traverser l'une des zones évidées (3) dans un sens et y être repassée dans une autre sens après avoir été passée derrière les épaulements (4a, 4b) formés par la zone amincie (4), c'est-à-dire derrière la deuxième zone évidée (2) qui est, par ailleurs, destinée à l'accrochage d'un mousqueton (7) disposé à l'extrémité d'une corde de liaison (8) fixée à l'utilisateur comme, par exemple, à son harnais. In a known manner, a descender 8, bearing the general reference (1), consists of a flat metal piece forming two hollowed out areas successive (2) and (3) connected together by a thinned zone (4) so as to allow the return rope (5) to be formed in a loop (6) to cross one of the recessed areas (3) in one direction and be ironed there in another direction after having passed behind the shoulders (4a, 4b) formed by the zone thinned (4), that is to say behind the second hollowed-out zone (2) which is, by elsewhere, intended for the attachment of a carabiner (7) disposed at the end of a connecting cord (8) fixed to the user as, for example, to his harness.

Selon l'invention, le procédé d'obtention d'un tel descendeur 8 est caractérisé en qu'il est conformé à partir d'une portion d'un profilé métallique. En d'autres termes, le procédé de réalisation consiste à déformer une portion de profilé métallique pour lui donner sa configuration finale ayant sensiblement la forme d'un 8, constitué par deux zones évidées adjacentes (2, 3).According to the invention, the method for obtaining such a descender 8 is characterized in that it is shaped from a portion of a profile metallic. In other words, the production process consists in deforming a portion of metal profile to give it its final configuration having substantially the shape of an 8, consisting of two recessed zones adjacent (2, 3).

Le procédé d'obtention de l'invention consiste dans la réalisation des étapes suivantes suivantes :

  • dans une première étape (figure 2), on découpe d'une portion droite de profilé (10) dans un profilé métallique filiforme, de longueur (L) correspondant à celle du développé du descendeur (1) à obtenir,
  • dans une deuxième étape (figure 3a et 3b), on déforme la portion droite de profilé (10) (figure 3a) pour lui donner la conformation finale en forme de 8 (figure 3b); la déformation se fait avantageusement selon un gabarit (30) de dimensions telles à permettre aux plans (11, 12) des extrémités libres de ladite portion de se rejoindre,
  • dans une étape complémentaire éventuelle, on procède à l'assemblage desdits plans des extrémités (11, 12) du descendeur 8 (1) de manière fixe et tel que cela est illustré à la figure 4.
The process for obtaining the invention consists in carrying out the following steps:
  • in a first step (FIG. 2), a straight section of section (10) is cut from a wire-like metal section, of length (L) corresponding to that of the developed of the descender (1) to be obtained,
  • in a second step (FIG. 3a and 3b), the straight section portion (10) is deformed (FIG. 3a) to give it the final 8-shaped conformation (FIG. 3b); the deformation is advantageously done according to a template (30) of dimensions such as to allow the planes (11, 12) of the free ends of said portion to meet,
  • in a possible additional step, the said planes of the ends (11, 12) of the descender 8 (1) are assembled in a fixed manner and as illustrated in FIG. 4.

Préférentiellement, le descendeur 8 (1) ainsi formé, comprend deux zones évidées (2, 3) de dimensions différentes, à savoir, une première zone évidée (3) et une deuxième zone évidée (2). La première zone (3) est de dimensions plus grandes que la deuxième zone (2) et est destinée au passage des brins (5a, 5b) de la corde (3), tandis que cette dernière passe en boucle derrière ladite deuxième zone (2), cette dernière étant destinée à l'accrochage d'un mousqueton (7) tel que cela est illustré à la figure 7.Preferably, the descender 8 (1) thus formed, comprises two hollowed out areas (2, 3) of different dimensions, namely, a first area hollowed out (3) and a second hollowed out area (2). The first area (3) is dimensions larger than the second zone (2) and is intended for passage strands (5a, 5b) of the rope (3), while the latter goes in a loop behind said second zone (2), the latter being intended for attachment a carabiner (7) as shown in Figure 7.

Selon un mode de réalisation, l'assemblage des plans d'extrémité (11, 12) du descendeur 8 (1) est effectué par une opération de soudage (13), figure 4.According to one embodiment, the assembly of the end planes (11, 12) of the descender 8 (1) is carried out by a welding operation (13), figure 4.

Selon une variante de réalisation représentée sur la figure 5, l'assemblage des plans d'extrémité (11, 12) du descendeur 8 (1) est effectué par l'intermédiaire d'une pièce mécanique de liaison rapportée (14).According to an alternative embodiment shown in FIG. 5, the assembly of the end planes (11, 12) of the descender 8 (1) is carried out by means of an attached mechanical connecting part (14).

Préférentiellement, le matériau dans lequel est réalisé le descendeur 8 à partir du profilé filiforme est de l'aluminium. La préférence qui est donnée à ce matériau est due à sa grande légèreté et à sa grande résistance.Preferably, the material in which the descender 8 is made from the thread profile is aluminum. The preference given to this material is due to its great lightness and its great resistance.

Egalement préférentiellement, le profilé métallique (10) à partir duquel est réalisé le descendeur 8 est de section circulaire (15).Also preferably, the metal profile (10) from which is made the descender 8 is of circular section (15).

La section circulaire est préférée pour ses qualités de glissement.The circular section is preferred for its sliding qualities.

Selon une autre caractéristique de l'invention, les deux zones évidées (2, 3) du descendeur 8 sont séparées au niveau de l'amincissement (4) qu'elles forment, par l'intermédiaire d'un élément de séparation (16). According to another characteristic of the invention, the two hollow areas (2, 3) of the descender 8 are separated at the level of the thinning (4) that they form, by means of a separating element (16).

Cet élément de séparation intermédiaire (16) est destiné à recevoir un marquage de référencement du produit, il peut également servir au marquage d'une norme ou de toutes autres indications.This intermediate separation element (16) is intended to receive a product referencing marking, it can also be used for marking of a standard or any other indication.

L'avantage d'effectuer ce marquage sur cet élément réside dans le fait qu'on évite ainsi d'avoir à marquer le descendeur 8 lui-même, ce qui pourrait provoquer une usure de la corde lors du coulissement, du fait des aspérités que cela provoquerait.The advantage of carrying out this marking on this element lies in the fact this avoids having to mark the descender 8 itself, which could cause wear of the rope during sliding, due to the roughness that it would cause.

L'élément de séparation intermédiaire (16) est fixé de manière permanente ou amovible sur le descendeur proprement dit par tout moyens, tels que soudure, vissage, clipsage, rivetage etc.The intermediate partition (16) is fixed so permanent or removable on the descender proper by any means, such as welding, screwing, clipping, riveting etc.

Bien entendu, l'invention n'est pas limitée aux modes de réalisations décrits et représentés à titre d'exemples, mais elle comprend aussi tous les équivalents techniques ainsi que leurs combinaisons.Of course, the invention is not limited to the embodiments described and shown as examples, but it also includes all of the technical equivalents and their combinations.

Claims (10)

Procédé d'obtention d'un descendeur 8 (1) destiné à l'assurage et la descente en rappel d'un alpiniste constitué par deux zones évidées successives (2, 3) reliées entre elles par une zone amincie (4), caractérisé en ce que le procédé d'obtention consiste à déformer une portion de profilé métallique pour lui donner sa configuration finale ayant sensiblement la forme d'un 8.Method for obtaining a descender 8 (1) intended for belaying and abseiling from a mountaineer consisting of two successive hollowed out zones (2, 3) linked together by a thinned zone (4), characterized in what the process for obtaining consists in deforming a portion of metal profile to give it its final configuration having substantially the shape of an 8. Procédé d'obtention d'un descendeur 8 (1) selon la revendication 1, caractérisé en ce que, dans une première étape, on découpe d'une portion droite de profilé (10) dans un profilé métallique filiforme, de longueur (L) correspondant à celle du développé du descendeur (1) à obtenir.Method for obtaining a descender 8 (1) according to claim 1, characterized in that , in a first step, a straight section of section (10) is cut from a wire-like metal section, of length (L) corresponding to that of the descender's press (1) to be obtained. Procédé d'obtention d'un descendeur 8 (1) selon la revendication 2, caractérisé en ce que, dans une deuxième étape, on déforme la portion droite de profilé (10) pour lui donner la conformation finale en forme de 8.Method for obtaining a descender 8 (1) according to claim 2, characterized in that , in a second step, the straight portion of the profile (10) is deformed to give it the final conformation in the form of 8. Procédé d'obtention d'un descendeur 8 (1) selon la revendication 3, caractérisé en ce que, dans une étape complémentaire, on procède à l'assemblage desdits plans des extrémités (11,12) du descendeur 8 (1).Method for obtaining a descender 8 (1) according to claim 3, characterized in that , in a complementary step, the said planes of the ends (11,12) of the descender 8 (1) are assembled. Procédé d'obtention d'un descendeur 8 (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le descendeur 8 est formé par deux zones évidées (2, 3) de dimensions différentes, dont la plus grande (3) est destinée au passage des brins (5a, 5b) de la corde (3) et dont la plus petite (2) derrière laquelle passe la boucle (6) de la corde (5) est destinée à l'accrochage d'un mousqueton (7).Method for obtaining a descender 8 (1) according to any one of the preceding claims, characterized in that the descender 8 is formed by two recessed zones (2, 3) of different dimensions, the largest of which (3) is intended for the passage of the strands (5a, 5b) of the rope (3) and the smallest of which (2) behind which the loop (6) of the rope (5) passes is intended for the attachment of a carabiner ( 7). Procédé selon l'une des revendications 4 ou 5, caractérisé en ce que l'assemblage des plans d'extrémité (11, 12) du descendeur 8 (1) est effectué par une opération de soudage (13).Method according to one of claims 4 or 5, characterized in that the assembly of the end planes (11, 12) of the descender 8 (1) is carried out by a welding operation (13). Procédé selon l'une des revendications 4 ou 5, caractérisé en ce que l'assemblage des plans d'extrémité (11, 12) du descendeur 8 (1) est effectué par l'intermédiaire d'une pièce mécanique de liaison (14) rapportée.Method according to one of claims 4 or 5, characterized in that the assembly of the end planes (11, 12) of the descender 8 (1) is carried out by means of a mechanical connecting part (14) reported. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau dans lequel est réalisé le descendeur 8 (1) à partir du profilé filiforme est de l'aluminium.Method according to any one of the preceding claims, characterized in that the material from which the descender 8 (1) is made from the filiform profile is aluminum. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le profilé métallique (10) à partir duquel est réalisé le descendeur 8 est de section circulaire (15).Method according to any one of the preceding claims, characterized in that the metal profile (10) from which the descender 8 is made is of circular section (15). Descendeur 8 (1) caractérisé en ce qu'il est obtenu selon le procédé des revendications précédentes.Descender 8 (1) characterized in that it is obtained according to the method of the preceding claims.
EP02354172A 2001-11-14 2002-11-13 Method for obtaining an "eight descender" for mountaineering and an "eight descender" obtained thereby Withdrawn EP1312391A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0114746A FR2832068A1 (en) 2001-11-14 2001-11-14 Method for obtaining mountaineering figure eight descender consists of deforming metal section portion to give it its final figure of eight shape
FR0114746 2001-11-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9636526B2 (en) 2014-01-24 2017-05-02 Randall Luke Galyan Frictional rope control device with on the fly friction adjustment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673543A1 (en) * 1991-03-04 1992-09-11 Prechin Jean Paul Blocker (lock) for a climbing rope
FR2706314A1 (en) * 1993-06-14 1994-12-23 Frechin Jean Paul Self-locking descender for mountaineering
FR2767484A3 (en) * 1997-08-25 1999-02-26 Jean Paul Frechin Self-locking accessory for alpine abseil device
US5947229A (en) * 1995-03-27 1999-09-07 Zedel Energy absorbing device for use with a safety lanyard and system including the device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2673543A1 (en) * 1991-03-04 1992-09-11 Prechin Jean Paul Blocker (lock) for a climbing rope
FR2706314A1 (en) * 1993-06-14 1994-12-23 Frechin Jean Paul Self-locking descender for mountaineering
US5947229A (en) * 1995-03-27 1999-09-07 Zedel Energy absorbing device for use with a safety lanyard and system including the device
FR2767484A3 (en) * 1997-08-25 1999-02-26 Jean Paul Frechin Self-locking accessory for alpine abseil device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9636526B2 (en) 2014-01-24 2017-05-02 Randall Luke Galyan Frictional rope control device with on the fly friction adjustment

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