Abstract: An apparatus for lifting an object for working therebeneath comprising a pair of parallel side plates having apertures through their upper ends and with a pin extending through the apertures. A base comprised of feet is secured with respect to the lower ends of the side plates. The base also has a forwardly extending foot. A sprocket is secured to the pin for rotation about an axis coincident with the axis of the pin with the sprocket having teeth extending radially therefrom. A chain is positioned over the sprocket with the links of the chain sequentially positionable with the teeth of the sprocket through the chain. A lifting plate is positionable in a lower orientation with a lifting surface. The lifting plate has an upwardly extending attachment member. A pedal has an interior end reciprocable between an elevated location and a lowered location. The pedal has an upwardly extending attachment member secured with respect to the second free end of the chain with a locking component.

Abstract: A relatively simple jack which can be manually operated using a wrench or mechanically operated using a driven socket wrench includes an elongated, upwardly tapering, square cross section casing, with a slot extending longitudinally of one side wall thereof, an endless chain mounted on sprockets at the top and bottom ends of the casing, and an off-the-shelf slack adjuster mounted on an upper side wall of the casing for driving the chain, which is engaged by a pawl having a load support arm extending outwardly through the slot in the front wall of the casing. By rotating the worm gear drive of the slack adjuster, the load support arm can be caused to move vertically in the slot to raise or lower a load.

Abstract: The present invention relates to a device for pushing and pulling an accessory instrument of a manufacturing plant, such as a clamp for a metallic mould, by means of a chain driven by a hydraulic actuator having a vertical cylinder. One end of the chain is supported by a case which houses the chain. The chain is driven by one of more sprockets engaging the chain at and rotatably supported by a movable part of the cylinder.

Abstract: Bar stock is fed to the chuck of a machine tool by a ball chain having a rigid pusher at the end engagable with the bar stock, the ball chain being advanced by a wheel having pockets for the ball chain.

Abstract: An apparatus for ejecting stacks of flat products, especially printed products from a receiver chute of a stacker device. The stack supported upon a support table which closes the receiver chute at its lower end is displaced by means of a forward and rearward movable ejection element from the support table. The ejection element is secured to one end of a flexible, spatially movable thrust and traction element, for instance a ball-and-socket chain. At the other end of the thrust and traction element there engages a drive unit, for instance an hydraulic or pneumatic piston-and-cylinder unit. The thrust and traction element is guided by a guide having a stationary part and a section which travels in the support table which changes its position. In a rest position of the support table the section travelling in the support table is in alignment with the stationary part of the guide. During its displacement over the support table the ejection element bears at the support table, preferably by means of rolls.