A lifter is constructed to include a hollow main upright, a frame pivoted to the main upright to carry a hand winch, a link coupled between the frame and the main upright, a hollow auxiliary upright axially movably mounted in the hollow main upright, a lifting upright axially movably mounted in the hollow auxiliary upright, two first pulley blocks coupled between the hand winch and the hollow auxiliary upright and adapted to lift the hollow auxiliary upright upon operation of the hand winch, and...

A portable cable hoist mechanism is provided which incorporates a wheel mounted base structure having base legs that are capable of being unlocked and folded or otherwise moved to an out-of-the-way position for storage or handling. The base forms a framework to which the extendible base legs are movably secured. Latch members fixed to each of the base legs are projected through latch receptacles in the base framework when the base legs are fully extended. Locking elements establish locking engag...

A carriage cooperates with a cable way machine with an oblique multigroove pulley and a friction drive drum, so oriented that the cable runs in straight directions off and onto circular grooves of the drum. One cable portion runs from the cable way machine through the carriage towards a fixed anchoring point, the remaining cable portion runs also through the carriage to a tension biasing anchoring point; function and configuration of a main cable and of a hauling cable are thus combined.

A jack for supporting a ceiling beam is provided and consists of a pair of vertical sliding support members operated by a winch mechanism with cable which allows one person to set the beam. The jack will lift heavy loads eliminating the need for a crane and more manpower. In a modification the winch handle can be operated by a foot lever on base of the jack.

A portable plural telescoping mast cable hoist mechanism is provided which incorporates a single cable for telescopically extending and retracting the mast sections and for controlling movement of a load handling carriage. A carriage lock mechanism is provided to prevent inadvertent movement of the carriage and movable mast sections while the cable hoist mechanism is being transported or otherwise moved about while positioned on its side. The carriage lock mechanism incorporates a freely pivotal...

A jack including an elongated hollow upright base section, an elongated tubular intermediate section and an inner section mounted for telescopic movement inside the base section. A cable runs from a winch on the base section over pulleys at lower and upper ends of the intermediate section to a cable anchor mounted on the inner section adjacent a lower end portion thereof. When the winch is turned, the inner and intermediate sections are raised and lowered. Transverse openings in the inner and in...

An extensible structure comprising in combination a plurality of elements adapted to fit into one another and to slide on a guiding device so as to increase or reduce the volume of the structure, each element having one girder, two lateral walls, a framework and a roof supported on said lateral walls and said girder, means for movably supporting the said elements and means for sequentially moving the said elements.

A multi-purpose lift device for use with vehicles and the like to elevate portions thereof, the device consisting of three concentric spaced apart telescoping pipe sections identified as an outer pipe section, an intermediate pipe section, and an inner pipe section, the outer pipe section being supported in a vertical position on a base, a cable supporting winch affixed to the outer pipe section adjacent the top end thereof, a pair of aligned tandemly disposed pulleys diametrically affixed to op...

This invention relates to a self-contained apparatus for extending an object from a central point in one of a plurality of directions and particularly to a new and improved automobile parking apparatus. The apparatus is mounted on an elevator and operates to direct a dolly having an automobile supported thereon into a stall on either side of the elevator. The apparatus includes fluid drive means coupled to the dolly through a unique pulley arrangement which multiplies the movement of the drive m...

A safety device for a lifting apparatus, said lifting device having a carriage member (12) guided in a column (14) said carriage member (12) selectively positioned with respect to said column member (14) by a flexible tension member (20) connected to a drive means (22); a pawl member (34) is disengaged from an elongated rack (62) by a predetermined tension in the tension member (20); A reduction in the predetermined tension in the flexible tension member (20) will automatically engage the pawl m...