The present invention provides a hoisting device for working in heights, specifically including a vehicle body, a lower bracket installed at a bottom of a safety ladder, a host driver fixed on the lower bracket and providing lifting power, an upper bracket installed at a top of the safety ladder, a traction rope connecting the upper bracket, the vehicle body and the host driver, and a sliding rail installed on the safety ladder, and further including a fall arrester installed on the sliding rail, a guiding device assembly installed on a back portion of the vehicle body, a stall protection device installed on the vehicle body and matched with the sliding rail, a collapsible pedal installed on a lower portion of the vehicle body and configured to carry people and goods, an operation handle fixed to an upper portion of the vehicle body and a position-limiting bracket installed on an upper portion of the safety ladder. The host driver drives, trough the traction rope, the vehicle body to ascend or descend along the sliding rail, thus enabling the vehicle body to ascend or descend so as to convey people and goods. The hoisting device is simple and convenient to operate, occupies a small floor space and can be installed without changing a structure of an original safety ladder.

Embodiments of the present disclosure describe methods and apparatuses for a load lifting system.

Embodiments of the present disclosure describe methods and apparatuses for a load lifting system.

An modular lift system for hoisting objects along a track to a predetermined height. The lift system may include a limit switch, a carriage with an automatic emergency braking system, and a peak to engage the track, whereby the carriage rolls along the side rails of the track between the peak mounted to the top of the track and the bottom of the track. The carriage can be adjustable thereby permitting it to be adapted to various types and sizes of tracks. The automatic emergency braking system is adapted to prevent the uncontrolled descent of the carriage in the event of a cable or primary brake failure.

A ground rod and guy stake extractor according to the present approach overcomes many deficiencies of contemporary methods, and allows for the rapid extraction of ground rods and guy stakes across a full range of environments, and at a wide range of extraction angles, with a straight pull on the item being extracted. Embodiments may be lightweight, easily transported, and operated by a single individual. Embodiments may include a winch, winch cable system, and support structure. The geometry is such that it is easy and straight forward to align the direction of pull with any rod or ground stake, and particularly for those driven into the ground within the commonly prescribed angular limits, thus assuring a continuous, steady pull of at least four feet in most embodiments. Guy stakes can therefore be easily extracted in one step, and typically ground rods (because of their length) in two steps.

A ground rod and guy stake extractor according to the present approach overcomes many deficiencies of contemporary methods, and allows for the rapid extraction of ground rods and guy stakes across a full range of environments, and at a wide range of extraction angles, with a straight pull on the item being extracted. Embodiments may be lightweight, easily transported, and operated by a single individual. Embodiments may include a winch, winch cable system, and support structure. The geometry is such that it is easy and straight forward to align the direction of pull with any rod or ground stake, and particularly for those driven into the ground within the commonly prescribed angular limits, thus assuring a continuous, steady pull of at least four feet in most embodiments. Guy stakes can therefore be easily extracted in one step, and typically ground rods (because of their length) in two steps.

An attic ladder modification kit, a method of modifying an attic ladder using the kit, an attic ladder, and a method of using the attic ladder. The attic ladder modification kit includes a plurality of components for installation onto the attic ladder to improve the safety and ease of use of the attic ladder through modification, either during construction of the attic ladder, or as an after-market addition to the attic ladder. The plurality of components includes a pair of springs to bias a hinged connection between a middle section and an upper section of the attic ladder, means to removably secure a lower section hingedly connected to the middle section of the attic ladder, and a rope and pulley system and a descent rope to facilitate raising and lowering the attic ladder into and out of an attic opening, respectively.

An attic ladder modification kit, a method of modifying an attic ladder using the kit, an attic ladder, and a method of using the attic ladder. The attic ladder modification kit includes a plurality of components for installation onto the attic ladder to improve the safety and ease of use of the attic ladder through modification, either during construction of the attic ladder, or as an after-market addition to the attic ladder. The plurality of components includes a pair of springs to bias a hinged connection between a middle section and an upper section of the attic ladder, means to removably secure a lower section hingedly connected to the middle section of the attic ladder, and a rope and pulley system and a descent rope to facilitate raising and lowering the attic ladder into and out of an attic opening, respectively.

An air conditioning crane boom assembly having a number of mounting feet that removably secure the assembly to the rungs of a stepladder. Braces extend from these feet to a boom that extends horizontally away from the rungs of the stepladder. A pulley or a winch may be attached to the base of the boom, near the rungs of the stepladder, and the boom extends away from the stepladder to facilitate safe and stable lifting of loads such as air-conditioner components.

An air conditioning crane boom assembly having a number of mounting feet that removably secure the assembly to the rungs of a stepladder. Braces extend from these feet to a boom that extends horizontally away from the rungs of the stepladder. A pulley or a winch may be attached to the base of the boom, near the rungs of the stepladder, and the boom extends away from the stepladder to facilitate safe and stable lifting of loads such as air-conditioner components.