The present application is directed to a tree stand lift system for elevating a person into a tree or other structure. The tree stand lift system includes, in an embodiment, a hunting platform assembly for supporting a person; a hoist assembly positioned above the platform; a hoist cable secured to the hoist assembly and positioned to lift a person from the ground up to the platform.

Method and apparatus for a portable hoisting system (10) having an upright gin pole (38) which is attached to the upright standing very tall pole (14) or tower (15) using a plurality of straps (16). Extending away from the gin pole (38) is an angularly adjustable arm (40) which is user selectable to be either, e.g., at a 90-degree angle or a 45-degree angle, which arm (40) is supported by a brace (42) connected between the extension arm (40) and the upright gin pole (38). The gin pole (38) is hollow on its inside which allows a load line (18) to travel through the interior (60) of the gin pole (38) from its lower end to its upper outlet end and includes a plurality of pulleys (44) which allow the load line (18) to travel through the inside (60) of the hoisting system (10). Also included is a heel block (24) wherein one end of the load line (18) is connected to a capstan hoist (30) disposed on the front or rear end of a vehicle (32) and a ball (19) with hook (20) for supporting a load (22). Also included optionally is a tag line (34) connected to the load line (18) and being held by a ground member (36) for helping to control the movement of the load (22).

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

A flange cover mounting and dismounting device, which comprises: a base part, comprising a fastener element with a fastener hole array, and being fastened on a flange cover mounting surface by the fastener hole array; and a jib arm assembly, having a first end being pivotally connected to the fastener element, and a second end being connected to the flange cover. The flange cover mounting and dismounting device can be fixed to the flange cover mounting surface having a corresponding fastener hole array, which is convenient for mounting and dismounting a flange cover. In addition, under most circumstances, the fastener hole array on the flange cover mounting surface is intrinsically owned by the devices, which originally can be applied to connect modules of each device or used for other applications.

An enclosure suitable for thermally insulating at least one distillation column comprising an elongate parallelepipedal framework and at least one part of a distillation column inside the framework, the enclosure or at least the lower part of the enclosure serving as support for the lifting means for installing elements in the column or for adding another part of the section of the column to that part of the column that is present in the enclosure or for adding another part of the enclosure.

A portable hoist system has an adjustable support strut mechanism, allowing for compact storage and portability, with the entire assembly retained as one unit. In one embodiment the support strut mechanism, which is connected on one end to a boom and at another end to a bracket, is foldable and adjustable using an adjustment pin and holes along the two-piece support strut mechanism. In one preferred form of the invention a winch of the hoist system is field-adjustable as to position on the hoist's boom, to overcome problems of space constraints.

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

Hoists, platforms and davits are described as well as methods of securing same to telecommunication and other towers. The hoists, platforms and davits may be secured to the towers on a temporary basis using clamps. The clamps may include brackets and cables. The cables may be attached to the brackets, may wrap around the outer surface/perimeter of the tower pole/leg and may use tension to keep the bracket in place.

The invention disclosed is a rotational hoisting device that is mounted into the top opening of a mast pole located on a cellular network tower. The hoisting device is connected to a third party block and tackle and hoist line that is connected to a piece of cellular network equipment such as an antenna or radio. The rotational hoisting device can rotate back and forth in the mast pole to achieve mounting of the cellular equipment on a particular position on the mast pole without ever having disconnect the cellular equipment from the hoist lie.