Abstract: The invention provides apparatus for precise, well controlled positioning and levelling of factory constructed buildings. The apparatus comprises units used in pairs, one near each end of a building being installed. Each unit is a four wheeled vehicle with a jack at each end. Each wheel is independently driven and the units are remotely controlled, using cables, hydraulic or pneumatic hoses or wireless apparatus. In use the units are moved under the building under their own power and adjusted and maneuvered so that the jacks can engage the longitudinal beams used in factory manufactured buildings. The jacks are then operated to raise, lower and level the building and the wheels are driven to move the position the building desired. The jacks support pivotally mounted jack plates which can remain in secure engagement with the beam while the units are maneuvered such that the building can be moved lengthwise or sidewise or turned about an axis essentially perpendicular to the terrain.

Abstract: A portable power-operated lift and presenting mechanism has a base that is placed on the floor of an automobile trunk. A carriage moves between an elevated position and a lowered, transport position when a scissors jack connecting the carriage to the base respectively expands vertically and contracts vertically, expanding horizontally. The scissors jack is selectively power-operated, by a reversible electrical motor, to expand and contract vertically. The carriage has drawer slide assemblies on which is mounted a platform capable of supporting a heavy and bulky article. The platform is movable by the drawer slide assemblies, when the carriage is in an elevated position, between a retracted position in which the platform is generally over the base and within the trunk, and a presenting position in which the platform extends out from over the base, generally out of the trunk.

Abstract: The handling apparatus includes two spaced apart lower arms pivoting on a base, and two spaced apart upper arms pivoting on an elbow bearing on the lower arms. The lower arm is driven by a ball-screw arrangement in which a threaded drive, mounted on the base of the apparatus is connected to a ball screw attached to a strut between the ball screw and the lower arm. Moving the ball screw along the threaded drive member pivots the lower arm upward. Another ball screw arrangement is mounted on the lower arm and is attached to the lower end of the upper arm by means of cables that extend along a rear curved surface of the upper arm to allow for more travel of the upper arm. Various attachment can be mounted on the upper arm including hangers for propellers and rudders and a gripper unit for supporting propeller shafts. When handling propellers and rudders, a single material handling unit is used, and the propeller or rudder is hung between the spaced apart arms.

Abstract: A lift/tilt-bed trailer. Apparatus is described for either raising from or lowering to the ground a trailer bed in a single step while maintaining a substantially horizontal attitude relative thereto, or for tilting the trailer bed which is normally positioned parallel to the ground when the trailer is in its traveling mode for the purpose of loading or unloading the bed without substantial change in the orientation of the trailer "U"-frame in which the bed is located. Four pivotable tracks attached to the frame and corresponding roller wheels attached to the bed cooperate to achieve the desired motion. Since the trailer need not be detached from whatever device is used to move it about when it is to be loaded or unloaded, increased stability results with consequent reduction in risk to the operator.

Abstract: Lifting apparatus and a wheeled vehicle upon which it can be mounted. There is provided in accordance with an embodiment of the present invention lifting apparatus comprising a scissors mechanism including scissor arms having formed thereon a curved cam path, a cam disposed between the scissor arms for engagement therewith and selectable separation thereof for producing lifting motion thereof, a load support mounted onto the scissor arms and apparatus for selectably tilting the load support with respect to the scissors mechanism.

Abstract: A temporary roof support comprising a boom pivotally mounted and positioned on the front of the mining vehicle. A temporary roof support jack is pivotally mounted to the front of said boom. The jack comprises a base structure secured to the boom and extending laterally thereof. The base structure has four pivot pins including an inside pair of pivot pins symmetrically spaced on each side of the base structure and an outside pair of pivot pins symmetrically spaced on each side of the base structure. Two pairs of swing arms are pivoted to said inside pivot pins. Two linkage extensions are pivotally joined to each other and at opposite ends to the free ends of the swing arms. Two extensible hydraulic means are pivotally secured at one end to the outside pivot pins and pivoted at the opposite ends to the swing arms such that the axes of the swing arms and extensible hydraulic means are always crossed. A beam is attached to the pivot joint of the linkage arms for supporting the roof.

Abstract: A device including a stretchable assembly (2) of pairs of intersecting arms (3) and (4) pivoted to each other at the intersections for raising or lowering a table (5) mounted on the upper ends of the arms. The stretchable assembly (2) is vertically expandable or collapsible by a unit (6) of a cylinder (61) for advancing or retracting a piston rod (62), a pump (63) and an oil tank (66) mounted on a base plate (7) and fixed to a frame (1) at the lower end of the stretchable assembly (2). The piston rod (62) extends substantially upward from the cylinder (61) and is connected at its forward end to lower portions of the arms (3). The piston rod (62) intersects the arms (3) substantially at right angles thereto when the stretchable assembly (2) is in its collapsed position.

Abstract: A trailer comprises a container supported between a pair of scissors lifts having first and second arms movable about a pivot by a ram. The arms support the container by a pair of rollers and a mounting lug. The mounting lug comprises a lug on the container for engagement with a pair of U-shaped slots, a tilt slot and a lift slot. The lug engages the lift slot when the trailer is to be lifted. For tilting the lug engages the tilt slot thereby causing the rollers to disengage the container to permit tilting.

Abstract: A draft gear removal apparatus comprising a hydraulically actuated scissors type draft gear lifting apparatus having a plurality of wheels mounted outboard on the base thereof having portions thereof extending above the base and two of the wheels being steerable and having a hydraulically actuated draft gear compression device removably mounted on the table of the lifting apparatus having a movable plurality of hydraulically actuated cylinders thereon to selectively bear against the center sill of a railcar to assist in the removal of a compressed draft gear from the center sill.