Abstract: An apparatus to drag logs to a log splitter from locations distant from the log splitter to locations near the log splitter, and then to assist with lifting logs for placement on the log splitter, comprises generally a mast-and-boom assembly with a first mount point and first pulley, and a second mount point and second pulley at a height below said first mount point and first pulley, a winch, and a cable attached a one end to said winch, threaded through said first pulley and said second pulley, and connectable at the other end to a log via a connection means, said apparatus being suitable for integration with a log splitter.

Abstract: A command shaping control system and method for rotary boom cranes provides a way to reduce payload pendulation caused by real-time input signals, from either operator command or automated crane maneuvers. The method can take input commands and can apply a command shaping filter to reduce contributors to payload pendulation due to rotation, elevation, and hoisting movements in order to control crane response and reduce tangential and radial payload pendulation. A filter can be applied to a pendulation excitation frequency to reduce residual radial pendulation and tangential pendulation amplitudes.

Abstract: A light-duty electric crane structure includes a base, a supporting mast, a movable boom and an electric winch. The base is mountable onto a truck body, and the supporting mast is placed into a holding pipe of the base and can be rotatably adjusted relative thereto. A center portion of the supporting mast is provided with a manual lever for controlling rotation and lateral movement of the movable boom. The top of the supporting mast is provided with a supporting base for securing of the boom, and the center portion of the boom is provided with a platform for the mounting of the electric winch. The angle of inclination of the boom can be adjusted by a pin latch. A free end of the boom has pivotally mounted thereon a pulley through which is fed a hoisting rope of the winch. A load hook is attached to the end of the rope.

Abstract: A portable crane includes a bracket mounted on a shaft extending upwardly from bearings on the vehicle; a boom extending outwardly from the bracket, a spool rotatable in the bracket carrying a cable, which extends outwardly around a pulley, a hook on the outer end of the cable for supporting a load, and a pair of slack adjusters, one of which receives the shaft for rotating the latter and consequently the boom between use and transport positions, the other slack adjuster engaging the spool for rotating the latter to wind the cable thereon.

Abstract: There is disclosed a hoist adapted to be mounted on a conventional sectional scaffold structure in which the hoist apparatus consists of a boom assembly to be mounted near the top of a scaffold structure and a winch assembly to be mounted near the bottom of such structure. The winch assembly includes a cable drum and a cable, a worm gear drive for the drum and a two-speed pulley drive from the motor to the worm gear. The cable runs upwardly in proximity to a column of the scaffold structure and through a short hollow vertical mast section on top of which is mounted a rotatable boom having a pair of pulleys to guide the cable out of the top of the mast section to the end of the boom and downwardly to receive a load. The mast section supporting the boom may be only about six feet long and is removably attached to a column of the scaffold structure so that the scaffold structure effectively supplies the mast for the boom of the hoist.