A pulley system for a confined space tripod includes a pulley including a pulley cavity having a first width and a second width. A pulley safety bracket is attached with the pulley. The pulley safety bracket includes a removable detent pin configured for placement above the pulley that prevents a pulley cable from dislodging from the pulley.

A hoist tool for handling a shrink element of a gear system. The hoist tool includes a suspension section, support legs for leaning on a foundation structure of the gear system and for supporting the suspension section to be above the shrink element, a lift sling for surrounding the shrink element, and a force generating system between the suspension section and the lift sling and suitable for generating a lifting force on the lift sling so as to suspend the shrink element. During maintenance of the gear system, the weight of the shrink element can be compensated for with the hoist tool and therefore crane capacity is needed for compensating for only the rest of the weight of the gear system without the weight of the shrink element.

A lifting device (1, 14, 18, 28, 31, 36, 46, 50) has three booms (2, 19) of adjustable length, which in each case have a first end section (4, 20) and a second end section (5, 21) opposite the first end section (4, 20). While the first end sections (4, 20) of all booms (2, 19) are articulatedly connected to one another, the second end sections (5, 21) are articulatedly and rotatably mounted in respective bearings (7, 24, 29). The bearings (7, 24, 29) are thereby arranged at fixed positions relative to one another. Furthermore, in each boom (2, 19) at least the first end section (4, 20) can be rotated about the longitudinal axis of the boom (2, 19) with respect to the second end section (5, 21). In particular, the booms (2, 19) always form a tripod, which is characterized by a high stability. The lifting device (1, 14, 18, 28, 31, 36, 46, 50) is therefore suitable for lifting very heavy loads, wherein greater ranges can be achieved compared to known lifting devices. In addition, the lifting device (1, 14, 18, 28, 31, 36, 46, 50) can be pivoted further than known lifting devices.

An article of manufacture for providing an earth extraction device provides a set of three posts, a post securing bolt having a threaded end and a fix end and passing through the first top hole and the second top hole of each of the three posts in consecutive order for coupling the set of three posts together at a coupling point, a mating nut for coupling to the threaded end of the post securing bolt after protruding through the second top hole of the third post, a block and tackle pully-and-winch, and a top chain having a first end and a second end, the top chain configured around each of the posts of the set of three post above the coupling point. The block and tackle pully-and-winch includes a hook coupled to a top end, a winch cable configured within the pully and winch; a bottom chain coupled to a bottom end, and a winch handle, the winch handle configured to rotate the winch causing the winch cable within the block and tackle to shorten with an upward stroke. The first end and the second end of the top chain engaging the hook to suspend the pully and winch below the coupling point of the set of three posts.

A crane assembly is configured to move a camera. The crane assembly has a base support assembly which includes a box support, joined to at least three box leg sleeves extending outward and downward from the box support. A plurality of legs where each leg is joined to one of the box leg sleeves. A plurality of drop in leg forks where each drop in leg fork joined is to at least one of the legs. A plurality of spreader bars where each spreader bar is joined to two of the drop in leg forks.

A hoist for removing an object to enable an individual to work on the object includes a first substantially vertical support mounted on a floor surface. A second substantially vertical support mounted on the floor surface and being spaced a predetermined distance away from the first substantially vertical support. The first and second substantially vertical supports include an upper surface. A substantially horizontal member extending across the upper surfaces of the first and second substantially vertical supports. A first vertical lift is operatively positioned within the first substantially vertical support. A second vertical lift is operatively positioned within the second substantially vertical support. The first and second vertical lifts selectively raising the member relative to the floor surface. A winch is operatively mounted on the substantially horizontal member for lifting the object relative to the member for enabling an individual to work on the object.

A silo-mountable rescue assembly for accessing a distressed person in a silo includes a tripod that is configured to couple to a top of a silo so that an apex of the tripod is substantially centrally positioned over an opening in the silo. A block and tackle is coupled to the tripod proximate to the apex. The block and tackle is configured to lower equipment and personnel into the silo to rescue a distressed person in the silo.

A silo-mountable rescue assembly for accessing a distressed person in a silo includes a tripod that is configured to couple to a top of a silo so that an apex of the tripod is substantially centrally positioned over an opening in the silo. A block and tackle is coupled to the tripod proximate to the apex. The block and tackle is configured to lower equipment and personnel into the silo to rescue a distressed person in the silo.

A system and method for quickly and efficiently installing a toilet using a hoist. The toilet hoist includes a hoist base, at least one leg, a drive system, a power system, and at least one support mechanism. The at least one leg is coupled to the hoist base. The power system controls actuation of the drive system; when actuated, the drive system alters the vertical position of the support mechanism. The support mechanism is configured to secure a toilet for hoisting.

A tripod comprising a head assembly and three legs, wherein each of the three legs is pivotally coupled at a proximal end thereof to the head assembly, the legs having a closed configuration in which they are arranged substantially parallel to each other, and an operative configuration in which the distal ends of the legs are extended outwards; wherein the head assembly includes a head body and a locking ring rotatably coupled to the head body; wherein the locking ring has a first orientation relative to the head body in which portions of the locking ring engage each of the legs in their operative configuration and the locking ring prevents displacement of each leg from its operative configuration to its closed configuration; and the locking ring has a second orientation relative to the head body in which peripheral portions of the locking ring are spaced from each of the legs and the legs are permitted to be displaced from their operative configuration to their closed configuration