Abstract: 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.

Abstract: The invention relates to a crane socket for a loading crane, including a base part which has a bearing region for bearing the rotatable part of a loading crane, at least one support part which is used to additionally support the crane socket on a substructure, and a joint which connects the base part to the at least one support part. The joint is a torsionally flexible support, in which a first end of the support is connected to the base part, and a second end of the support is connected to the at least one support part.

Abstract: A self-propelled flat-bed trolley is provided which includes a motor for locomotion and including a load-bearing platform and an articulated crane with a telescopic arm adapted to load and unload articles to and from the platform. The crane is maneuverable to locate the center-of-mass of the articles within a base of support for the trolley, with the trolley further including a controller for controlling the motor and articulated crane.

Abstract: A telescopic boom for a crane has at least two telescopable telescoping sections in the form of lattice pieces, each of which exhibits a hollow structure that has in essence the shape of a box. The bottom chords of adjacent sections have in each instance a pinning structure to provide for pinning to each other during normal crane operations. By way of the design of at least the outer telescoping section, at least some of the force that is introduced into the pinned joint can be dissipated into the top chord of the boom.

Abstract: A telescopic mast system includes a telescopic mast comprising a plurality of telescopic mast sections and a drive mechanism for extending and retracting the telescopic mast sections. The drive mechanism includes a rigid chain having one end connected to a last one of the telescopic mast sections to move the telescopic mast sections and a plurality of guide plates cooperating with the telescopic mast sections to prevent buckling of the rigid chain.

Abstract: A crane tower device includes a basket that supports a tower crane and sits within a bay formed by the vertical columns of a building under construction. The basket and the tower crane are supported by support stubs that are attached to the vertical columns. Because the lateral and vertical load is principally distributed vertically to the vertical columns rather than horizontally, no reinforcement of the horizontal beams, floors or any other portion of the building structure are needed, which results in substantial cost savings.

Abstract: The hydraulic lift boom attachment including a support frame and a telescopic lifting arm wherein the support frame is coupled to a tractor's three point hitch which hydraulically raises or lowers the support frame. The telescopic lifting arm has one end coupled to the support frame and the other end is coupled to the tractor's draw bar via a pulley assembly to rotate such other end of the telescopic lifting arm when the support frame is hydraulically raised or lowered. Furthermore, the support frame of the hydraulic lift boom attachment includes a telescopic vertical support assembly to vary the vertical height of the telescopic lifting arm.

Abstract: A platform assembly designed for use in supporting a crane during the construction of a multi-story building is described. The assembly includes a platform for supporting a crane and means for fixedly attaching the platform to differing locations along the length of a structural column of such building during construction of the latter.

Abstract: A hoisting system for lifting construction items at a construction site that includes a base assembly, a telescoping pole assembly carried on the base assembly, a slidably positionable line guide assembly slidably mounted to the telescoping pole assembly, a hoisting line assembly having a hoisting line threaded through a guiding aperture of the line guide assembly, and a ratcheting winch assembly mounted onto the telescoping pole assembly and including a take up reel upon which a length of the hoisting line is wound.

Abstract: Apparatus to temporarily enclose multi-story structures such as municipal water towers during sandblasting and painting to thereby contain the debris and overspray from the environment. A plurality of booms extending in an array outwardly from the top of the structure are temporarily attached to the structure. Hoisting and guide cables extend downwardly from the ends of the booms out beyond the outermost periphery of the structure. A plurality of fabric or plastic panels are supported on a framework in turn attached to guides on the guide cables and the guides are attached to the hoisting cables. The guide cables are anchored to ground. The hoisting cables are connected to a common hoisting engine. The entire assembly of panels can be raised in unison about the structure for daily activities and then lowered at night or quickly lowered in the event of high winds.

Abstract: A crane or lifting device includes a base assembly with a telescopic and rotatable column mounting a boom assembly including a telescopic boom arm. A strap is connected at one end thereof to the base assembly, extends through the boom arm, and is connected at another end thereof to a hook for engaging a load. An extensible/retractable jack assembly innerconnects the column and the boom arm for raising and lowering the boom arm. The crane can be mounted in an automobile trunk for raising and lowering the boom assembly.

Abstract: The instant invention concerns a transportable overhead gantry for spanning a roadway having two supports linked in an articulated manner to a cross-member. The cross-member is adjustable for height, for example using a winch operable to move the cross-member along the supports and, being made up of three or four parts, can be telescopically retracted. The supports can be folded towards each other in a plane defined by the cross-member so that the entire overhead gantry can be transported on a conventional truck. The overhead gantry can be erected at any point along a multi-lane expressway without special machinery or equipment and is thus suitable for the rapid and temporary display of traffic signs.

Abstract: An apparatus connected to an arm in a robot system removes injection molded and die cast products while compensating for the load on the piston rods of the apparatus. A chuck for grasping the products is moved up and down by a pair of pneumatic cylinders on a frame and intermediate frame. The pneumatic cylinders carry the load of the various elements of the apparatus. In order to eliminate variations in the load carried by the cylinders and absorb the shock at the ends of the cylinder strokes, the apparatus includes surge tanks connected to the cylinders. Compressed air is provided through the surge tanks to provide an upward pressure offsetting the load on the cylinders.