Patent ID: 9133632
Filing Date: 2015-09-15
Classification: B66B,B66F,E04G

Abstract:
1. A device for lifting loads or individuals over a structure, the device comprising: at least one platform; a first mast and a second mast independently attached to the at least one platform, the first mast and the second mast being formed from a plurality of modular elements; a plurality of hoist lifting elements adapted to be connected or disconnected from said first and second masts; a plurality of spring-loaded hooks configured to temporarily immobilize the at least one platform relative to one of the plurality of modular elements of the masts to allow addition or removal of at least one of said plurality of modular elements with respect to the masts, each of said plurality of hooks having an indented aperture configured to saddle a brace of one of said plurality of modular elements, each of said plurality of hooks forming a retractable catch configured to pivot upon contacting a bottom surface of said brace during lifting of the at least one platform relative to the masts, and each of said plurality of hooks being configured to rest on one of the plurality of modular elements in order to prevent lowering of the at least one platform with respect to the masts, each of said plurality of hooks being connected to a horizontal bar having a major longitudinal axis configured to move horizontally between the masts into an extended and retracted position, said extended position being when a respective one of said hooks extends into one of the plurality of modular elements to prevent lowering of the at least one platform relative to the masts, and said retracted position being when said respective one of said hooks is positioned outside of the plurality of modular elements to allow lowering of the at least one platform relative to the masts; each of said first and second masts respectively having at least two guide paths configured to guide the at least one platform, said masts having a free surface capable of attaching an anchor to the structure along which the first and second masts are positioned, wherein each guide path is configured to be directly connected to a single platform so as to allow synchronous and asynchronous raising of two platforms positioned on opposite sides of only one of the masts; the at least one platform having a C-shaped support removably connected thereto, the support having a channel fitted with rollers configured to travel along each guide path of the masts; and an additional safety device comprising a roller connected to a stop element, the roller being configured to travel along a cable of the plurality of hoist lifting elements, the additional safety device configured to prevent the at least one platform from falling with respect to the masts when the cable moves into a loosened state, and the additional safety device being configured to allow the at least one platform to move freely along the masts when the cable is in a taught state.