Retrieval and fall arrest system for manhole applications

Details Retrieval and fall arrest system for manhole applications Retrieval and fall arrest system for manhole applications

A - Human Necessities

62

B

A62B 1/06 (2006.01) A62B 1/08 (2006.01) A62B 35/00 (2006.01) B66C 5/02 (2006.01) B66C 23/26 (2006.01) B66D 5/00 (2006.01) E02D 29/12 (2006.01) E04H 17/18 (2006.01)

Patent

CA 2685871

A foldable hoist, fall-arrest and recovery system to be used in connection with a rectangular manhole guard having vertical posts at four corners of the guard including an upper structure having four elongated support members forming a pyramid shaped structure with the base of each of the support members being securely mounted to the top of a post on the manhole guard and the other ends of the support members being pivotally connected to an apex so that the upper structure can be folded for storage and shipment when disconnected from the base and means connected at the apex for raising and lowering workers and/or cargo into and out of the manhole or for arresting the fall or recovering a worker.

L'invention concerne un système de levage d'arrêt de chute et de récupération pliable, utilisable avec une barrière de trou d'homme rectangulaire, ayant des montants verticaux aux quatre coins de la barrière comprenant une structure supérieure ayant quatre éléments de support allongés formant une structure de forme pyramidale, la base de chaque élément de support étant fermement montée sur le sommet d'un montant sur la barrière de trou d'homme, et les autres extrémités des éléments de support étant raccordées de manière pivotante à un sommet, de sorte que la structure supérieure peut être repliée en vue d'un stockage et d'une expédition lorsqu'elle est déconnectée de la base, et un moyen étant raccordé au sommet pour soulever et descendre des ouvriers et/ou un chargement dans le trou d'homme et hors de celui-ci, ou afin d'arrêter la chute d'un ouvrier ou de le récupérer.

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