EP2246100B1 - A self-locking descender and a method for descending a load on a rope - Google Patents

A self-locking descender and a method for descending a load on a rope Download PDF

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Publication number
EP2246100B1
EP2246100B1 EP09461510A EP09461510A EP2246100B1 EP 2246100 B1 EP2246100 B1 EP 2246100B1 EP 09461510 A EP09461510 A EP 09461510A EP 09461510 A EP09461510 A EP 09461510A EP 2246100 B1 EP2246100 B1 EP 2246100B1
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EP
European Patent Office
Prior art keywords
rope
pulley
self
descender
pivotable
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.)
Active
Application number
EP09461510A
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German (de)
English (en)
French (fr)
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EP2246100A1 (en
Inventor
Jacek Sordyl
Marek Polanek
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Individual
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Individual
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Priority to ES09461510T priority Critical patent/ES2402625T3/es
Priority to EP09461510A priority patent/EP2246100B1/en
Priority to PL09461510T priority patent/PL2246100T3/pl
Publication of EP2246100A1 publication Critical patent/EP2246100A1/en
Application granted granted Critical
Publication of EP2246100B1 publication Critical patent/EP2246100B1/en
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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

Definitions

  • the invention relates to a self-locking descender for controlling the movement of a load on a rope and a method for descending a load on a rope.
  • Descender devices for controlling movement of a load on a rope are widely used for mountaineering, alpinism, life-saving and other applications.
  • Various attempts have been made to improve the descenders in order to obtain a device which is simple, yet safe to use.
  • the commonly used descenders have a self-locking mechanism which can be released by a lever, which is to be operated by one hand of the user which has to grip the descender, while the other hand of the user guides the free end of the rope.
  • a US patent US5850893 describes a self-locking descender for a rope having a head clamping the rope to a resistive element, which can be released via a lever operable directly by the user's hand which does not guide the free end of the rope.
  • a European patent application EP2018894 describes a self-locking descender for a rope, also comprising a head clamping the rope to a resistive element, which can be released via a lever operable by user's hand, wherein the user may further move the lever to a position which additionally blocks the passage of the rope.
  • a German patent application DE2602092A1 describes a self-locking descender for controlling the movement of a load on a rope, comprising rope guiding means comprising a rotatable head with a clamping element for clamping the rope to a resistive element and a pulley, around which the rope is to be guided.
  • the pulley is movable between a first position and a second position and coupled with the rotatable head by a coupling mechanism, such that when the descender is loaded, when the pulley is in the first position, the clamping element of the rotatable head clamps the rope towards the resistive element so that the rope movement is blocked, and when the pulley is in the second position, the clamping element of the rotatable head is distanced from the resistive element so that the rope movement is enabled.
  • the pulley is movable from the first position to the second position by pulling the free end of the rope. When the free end of the rope is not pulled, the pulley is automatically movable from the second position to the first position due to the action of a spring.
  • the aim of the present invention is to provide a self-locking descender which is simpler and safer to use, as well as a simpler and safer method for descending a load on a rope.
  • the object of the invention is a self-locking descender for controlling the movement of a load on a rope, comprising rope guiding means comprising a rotatable head with a clamping element for clamping the rope to a resistive element, wherein the rope guiding means further comprise a pulley, around which the rope is to be guided, the pulley movable between a first position and a second position, wherein the pulley is coupled with the rotatable head by a coupling mechanism, such that when the descender is loaded, when the pulley is in the first position, the clamping element of the rotatable head clamps the rope towards the resistive element so that the rope movement is blocked, and when the pulley is in the second position, the clamping element of the rotatable head is distanced from the resistive element so that the rope movement is enabled, wherein the pulley is movable from the first position to the second position by pulling the free end of the rope.
  • the coupling mechanism comprises a pivotable arm coupled with the pulley at its movable end and having a first element of a transmission fixed at its pivot point, the first element of the transmission being coupled with a second element of the transmission fixed to a rotatable shaft on which the rotatable head is mounted and when the free end of the rope is not pulled, the pulley is automatically movable from the second position to the first position by the pivotable arm due to the friction force between the rotatable head and the rope.
  • the coupling mechanism further comprises a stabilizing mechanism for stabilizing the coupling mechanism when the pulley is in the second position.
  • the pivotable arm is coupled with the pulley via a pivotable portion of the pivotable arm, the pivotable portion being coupled with a first pivotable hook of the stabilizing mechanism, the first pivotable hook being engagable with a second pivotable hook fixed apart from the pivotable arm.
  • the first pivotable hook and the second pivotable hook have sliding surfaces which are configured to engage when the pulley moves from the first position to the second position and to disengage when the pulley moves from the second position to the first position.
  • the self-locking descender comprises an internal plate, wherein the rope guiding means are located on one side of the internal plate and the coupling mechanism is located on the opposite side of the internal plate.
  • the pulley is movable along an opening in the internal plate.
  • the internal plate comprises a load attachment opening.
  • the self-locking descender further comprises a base plate, on which the coupling mechanism is mounted, wherein the base plate is fixed to the internal plate.
  • the self-locking descender further comprises a cover plate pivotally mounted on the internal plate, for covering the rope guiding means.
  • the cover plate comprises a load attachment opening limited by a pivotable flap.
  • a further object of the invention is a method for descending a load on a rope, comprising the steps of providing the self-locking descender according to the invention, mounting the descender on a rope, attaching a load to the descender, pulling the free end of the rope in order to enable movement of the loaded descender on the rope.
  • the self-locking descender according to the invention is simpler to use than the prior art descenders, as it requires only one hand of the user to guide the rope and control the movement of the rope. Therefore, it is also safer to use, as the user has one hand free to perform additional actions during descending on the rope. Furthermore, the rope is guided via the descender in a straight fashion, i.e. it does not rotate along its longitudinal axis, therefore the rope does not twist during operation. Accordingly, the method for descending a load using a descender according to the invention is also simpler and safer than the prior art methods.
  • the self-locking descender comprises rope guiding means 200 for guiding and controlling the movement of a rope 100 when the descender is in use.
  • the rope guiding means 200 comprise a rotatable head 201 with a clamping element 202 for clamping the rope to a resistive element 203.
  • the rope guiding means 200 further comprise a pulley 204, around which the rope is to be guided.
  • the pulley 204 is movable between a first position and a second position.
  • the pulley 204 is coupled with the rotatable head 201 by a coupling mechanism 300.
  • the rope 100 is installed by placing the rope within the rope guiding means 200.
  • the load such as the body of the user or a separate load, is attached to a load-attachment opening 412 directly or via attachment means such as a karabiner.
  • One end of the rope constitutes is loaded end 101, i.e. the end which is tensed between a rope fixing point and the loaded descender, while the other end of the rope is the free end 102, i.e. the end towards which the load descends.
  • the pulley 204 When the descender is loaded, the pulley 204 is movable from the first position to the second position by pulling the free end 102 of the rope 100. In turn, when the free end 102 of the rope 100 is not pulled, the pulley 204 is automatically movable from the second position to the first position due to the friction force between the rotatable head 201 and the rope 100.
  • Such configuration allows controlling the movement of the load on the rope by pulling the free end of the rope. Therefore, the user may use only one hand for both guiding the free end of the rope and controlling the rate of descending, while the other hand is free to perform additional actions.
  • the coupling mechanism 300 comprises a pivotable arm 301 coupled with the pulley 204 at its movable end and having a first element 321 of a transmission 320 fixed at its pivot point.
  • the first element 321 of the transmission 320 is coupled with a second element 322 of the transmission 320 fixed to a rotatable shaft 323 on which the rotatable head 201 is mounted.
  • the rotatable shaft 323 may be rotatable in a ball bearing 324 with rings 325, 326.
  • the transmission 320 may be a toothed gear transmission.
  • the coupling mechanism 300 further comprises a stabilizing mechanism 310 for stabilizing the coupling mechanism 300 when the pulley 204 is in the second position.
  • the transmission 320 causes rotation of the rotatable head 201 such that the clamping element 202 is distanced from the resistive element 203 and thus the descender is in movement-enabled configuration.
  • the stabilizing mechanism 310 stabilizes the coupling mechanism so that slight variations in the pulling force do not affect the movement of the rope 100.
  • the user by slightly releasing the tightened rope, may effect movement of the rope in order to descend along the rope.
  • the stabilizing mechanism 310 may be formed by two pivotable hooks 311, 312.
  • the pivotable arm 301 may by coupled with the pulley 204 via a pivotable portion 302 of the pivotable arm 301, the pivotable portion 302 being coupled with a first pivotable hook 311 of the stabilizing mechanism 310.
  • the first pivotable hook 311 may be engagable with a second pivotable hook 312 fixed apart from the pivotable arm 301.
  • the first pivotable hook 311 and the second pivotable hook 312 may have sliding surfaces 313, 314 configured to engage when the pulley 204 moves from the first position to the second position and to disengage when the pulley 204 moves from the second position to the first position.
  • the sliding surfaces 313, 314 remain engaged when the hook 311 is pressed by the pivotable portion 302 of the arm 301, which is effected by acting via the rope on the movable pulley 204 attached on one end of the pivotable portion 302.
  • the sliding surfaces 313, 314 of the hooks having appropriate slope, disengage.
  • the friction force between the rotatable head 201 and the rope 100 causes the rotation of the clamping element 202 of the rotatable head 201 towards the resistive element 203. Due to lack of pulling force at the free end 102 of the rope 100 and thus due to no additional force (additional to the weight of the free part of the rope) acting on the pulley 204, the pivotable portion 302 of the pivotable arm 301 is free to move and the pivotable hooks 311, 312 of the stabilizing mechanism 310 disengage. At the same time, the coupling mechanism 300, via the transmission 320 and the pivotable arm 301, causes the pulley 204 to move from the second position shown in Fig.
  • the descender preferably comprises an internal plate 410, wherein the rope guiding means 200 are located on one side of the internal plate 410 and the coupling mechanism 300 is located on the opposite side of the internal plate 410.
  • the internal plate may have an opening 411 along which the pulley 204 may be movable, thus further stabilizing the movement path of the pivotable arm 301.
  • the descender may comprise a base plate 420 fixed to the internal plate 410 and the coupling mechanism 300 can be mounted on the base plate 420.
  • the descender may further comprise a cover plate 430 pivotally mounted on the internal plate 410, for covering the rope guiding means 200, so as to prevent the rope guiding means 200 from clogging or from accidental falling out of the rope.
  • the cover plate 430 may comprise a load attachment opening 431 limited by a pivotable flap 432. This allows the user to pivot the cover plate 430 even when a karabiner is attached to the descender, by moving aside the pivotable flap 432.
  • the pivotable flap 432 may comprise a spring which causes automatic return of the pivotable flap 432 to the closed position.
  • the rotatable head 201, the resistive element 203 and/or the pulley 204 may comprise circumferential concave edges, so as to increase the area of contact with the rope 100.
  • the rotatable head 201 may comprise a spring for keeping the head 201 in a movement-enabled position when the descender is not in use, thereby making it easier for the user to install the rope before using the descender.
  • the descender may be produced in a variety of sizes, adapted to specific diameters of ropes.
  • One type of descender may be designed to be suitable for a particular rope diameter or a range of rope diameters, depending on the dimension of the rope guiding means, especially their circumferential concave edges and the distance between the clamping element 202 and the resistive element 203.
  • the elements of the rope guiding means 200 such as the rotatable head 201, the resistive element 203 and the pulley 204 may be made of aluminum alloy or stainless steel.
  • the elements of the coupling mechanism 300 may be made of tool steel, such as NC11, WCL, WNL steel.
  • the internal plate 410, the base plate 420 and the covering plate 430 may be made of aluminum alloys.
  • the self-locking descender In order to descend a load on a rope using the method according to the invention, the self-locking descender according to the invention is used.
  • the descender is mounted on the rope 100 by guiding the rope 100 via the rope guiding means 200 and a load is attached to the descender, for example via a karabiner to the load attachment opening 412.
  • the load may be the body of the user or any other load.
  • the user then pulls the free end 102 of the rope 100 in order to move the pulley 204 to the second position and thus set the descender in a movement-enabled configuration, thereby enabling movement of the loaded descender on the rope 100.
  • the descender automatically blocks the rope by rotation of the head 201 and clamping the rope 100 towards the resistive element 203 by the clamping element 202 of the head 201.
  • the self-locking descender according to the invention is particularly usable for controlling the movement of a load on a rope, in particular a synthetic climbing rope. It may be used in various mountaineering, alpinism, life-saving, special forces and other applications.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
EP09461510A 2009-05-01 2009-05-01 A self-locking descender and a method for descending a load on a rope Active EP2246100B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES09461510T ES2402625T3 (es) 2009-05-01 2009-05-01 Un dispositivo de descenso de cierre automático y un método para descender una carga sobre una cuerda
EP09461510A EP2246100B1 (en) 2009-05-01 2009-05-01 A self-locking descender and a method for descending a load on a rope
PL09461510T PL2246100T3 (pl) 2009-05-01 2009-05-01 Samoblokujący się przyrząd zjazdowy i sposób obniżania ładunku na linie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09461510A EP2246100B1 (en) 2009-05-01 2009-05-01 A self-locking descender and a method for descending a load on a rope

Publications (2)

Publication Number Publication Date
EP2246100A1 EP2246100A1 (en) 2010-11-03
EP2246100B1 true EP2246100B1 (en) 2013-01-09

Family

ID=40756243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09461510A Active EP2246100B1 (en) 2009-05-01 2009-05-01 A self-locking descender and a method for descending a load on a rope

Country Status (3)

Country Link
EP (1) EP2246100B1 (pl)
ES (1) ES2402625T3 (pl)
PL (1) PL2246100T3 (pl)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2554219B1 (en) * 2011-08-03 2023-11-29 Camp S.p.A. Assisted safety locking device equipped with anti-panic device
CN102847244B (zh) * 2012-09-17 2015-07-22 何少敦 一种悬吊器
CN102824703B (zh) * 2012-09-20 2015-07-22 何少敦 一种悬吊器
CA2917827C (en) * 2013-08-02 2022-08-30 Atlas Devices, Llc Descent assist device for powered ascenders
EP3074093A4 (en) * 2013-11-25 2017-08-02 3M Innovative Properties Company Rope grab
BR112019012333A2 (pt) 2016-12-16 2020-03-03 3M Innovative Properties Company Aparelho de proteção contra quedas com sistema de frenagem
IT201700067165A1 (it) * 2017-06-16 2018-12-16 Bernhard Kofler Freno per corda per scalatori per assorbire cadute in corda
CN110975179B (zh) * 2019-12-10 2021-09-03 浙江华电器材检测研究所有限公司 一种防慌乱的速降器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH609934A5 (en) 1975-09-12 1979-03-30 Mubir Ag Masch & App Pulley block with rope-clamping device
FR2741539B1 (fr) 1995-11-28 1998-01-30 Zedel Descendeur autobloquant pour corde a levier de commande
FR2919196B1 (fr) 2007-07-26 2009-10-09 Zedel Soc Par Actions Simplifi Descendeur autobloquant a poignee debrayable.

Also Published As

Publication number Publication date
ES2402625T3 (es) 2013-05-07
PL2246100T3 (pl) 2013-06-28
EP2246100A1 (en) 2010-11-03

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