Abstract: Roller system (10) to be installed at a base (12) of a domestic appliance, such as an oven, a dishwasher or the like, said roller system (10) comprising a housing (14) to be fixed at the base (12); a turning lever (16) pivotingly attached at its one free end to the housing (14); a roller (18) rotatably attached to the other free end of the turning lever (16); a tension arm (20) pivotingly attached to the turning lever (16), and a set screw (22) to be seated at the base (12) and being in thread engagement with a thread provided at the tension arm (20), wherein the roller system (10) is designed in such a manner that, when installed at the base (12) of a domestic appliance, the actuation of the set screw (22) leads to a pivoting of the turning lever (16) and thus to a height adjustment of the roller (18).

Abstract: A method and system for repositioning a pump jack installed atop a generally planar supporting surface to pump fluid from a wellbore uses at least three lift jacks arranged for movement along the supporting surface and for lifting upward relative thereto. The lift jacks are used to lift the pump jack upward from the supporting surface to be carried on the lift jacks and a force is applied to the pump jack in a predetermined direction along the supporting surface to move the lift jacks and the pump jack carried thereon along the supporting surface to a new position.

Abstract: A positioning actuator with three axes includes a base having a movable supporting member and a device for moving the member up and down, and a shaft connecting the movable head of the actuator to the base. The connecting shaft forms a swivel-type double linkage enabling sideways movement of the head relative to the base, and the lower end of the connecting shaft engages a part made of elastomeric material and is provided within the movable supporting member.

Abstract: An apparatus for supporting an umbrella. The apparatus of the invention includes a base plate which is placed on the surface of the area in which the umbrella is desired, a hollow cylinder connected at its lower end to the base plate and extending upwardly therefrom for receipt and support of an umbrella shaft, and a jack for contacting the underside of a vehicle to place a downward force on the base plate.

Abstract: An aircraft landing gear trolley (1) for supporting a landing gear (2) and adjusting the position of pintle bearings (39, 71) thereof in relation to pintle mountings on an aircraft is provided. The trolley (1) includes a rolling chassis (3) and a number of frames (15, 16, 17, 18, 19) nested therein, each arranged to provide a different degree of freedom for the landing gear (2). The said degrees of freedom include movement along horizontal, longitudinal and transverse axes, raising and lowering movement and rotational movement about horizontal and substantially upright axes. The rotational axes are coincident at a point positioned centrally of one of the pintle bearings (39) of landing gear (2) supported by the trolley.

Abstract: A dolly to transport articles such as wheel assemblies and transmissions, to present them with adjustable height and inclination. Support member on a base member are both controlled by seaparate elevator means, which are separately operable to vary the height and inclination of an article supported by them.

Abstract: A hydraulic jack, for lifting a heavy-weight structure such as a wing of an airplane, comprises a vertical primary cylinder, a ram vertically movably inserted in the primary cylinder, a lock nut threadedly mounted on an external thread of the ram, a first gear provided on the lock nut, a nut rotatably supported in a housing, a second gear provided on the nut and releasably meshing with the first gear of the lock nut, and a screw rod extending parallel to the ram and connected to the ram via a bracket. The screw rod has a second external thread and threadedly extends through the nut for vertical movement.

Abstract: The invention provides a lifting device for re-railing railroad vehicles comprising a guide rail which is adapted to be disposed substantially horizontally in use, having an outer surface including a toothed rack, a traveller mounted by rollers for guided movement along the rail, the traveller being adapted to support a lifting jack or the like in use, and a drive engaging the toothed rack for transversely moving the traveller.

Abstract: A powered lifter that enables one person to move loads such as cars, trucks, farm equipment, trailers and the like from one location to another. The device includes a rear frame supported by a pair of wheels that mounts an upstanding telescoping mast having a rotatable load supporting carriage at its upper end and a hydraulic cylinder connected to the mast for raising and lowering the carriage. The device also includes a front frame pivotally connected to the rear frame and supported by a drive wheel which is driven by a hydraulic motor and steered by a steering arm connected to the front frame which also houses the electronic circuitry for the device. A cabinet is mounted on the rear frame for housing the electrical and hydraulic components for the device, and for reinforcing the frame to avoid sagging and lateral shifting of the frame.

Abstract: A vehicle rerailing device for use in difficult climates and the full range of temperature conditions present in such climates comprising rerailing elements connectable to and acting on a derailed and possibly overturned vehicle and hydraulic means which can be operated over said full range of temperature conditions to operate the rerailing elements. Said hydraulic means comprises a hydraulic lift device which includes a plurality of pressure displacement cylinders, each with a displaceable piston in it, a pressure chamber at one side of the piston and a second chamber at the other side of the piston. A high pressure generating unit is connected with the pressure chamber. A vacuum generator is connected with the pressure chamber. A control valve determines whether the pressure chamber is pressurized or is at reduced pressure to shift the piston, respectively, to lift the load or to return unloaded.

Abstract: A vehicle hoist has an inclined column along which a carriage having normally horizontal support members is moved. The carriage is moved by a hydraulic cylinder and engages the column in a ratchet-like fashion allowing upwards movement but preventing the lowering of the carriage unless a release mechanism is actuated simultaneously with the hydraulic valve governing the cylinder. The invention improves safety and provides smooth surfaces about the column.

Abstract: An apparatus for laterally removing a workpiece, such as a guide roller on an endless track vehicle or motor from a piece of heavy equipment, from a space having limited vertical access. The apparatus includes a base for stably supporting the apparatus in a position laterally adjacent the workpiece, a support member secured to the base, a pivotable frame member pivotally secured to a portion of the support member, a cradle member for receiving and supporting the workpiece, which cradle member is secured to the pivotable frame member to be raised and lowered as the pivotable frame member is pivoted, and a force actuator, such as a hydraulic cylinder, supported by the support member and connected to the rigid pivotable frame member for pivoting it to raise and lower the cradle member as the force actuator is extended and retracted between its extended and stowed positions.

Abstract: An attachment or accessory to a wheeled floor jack of the type that rolls during use is disclosed. The accessory comprises a flat, elongated guard sized to receive and carry the wheels of the jack and to captivate them within it. The accessory provides a flat platform or base on which and within which the jack can roll and over which the weight lifted can be spread and serves to keep the wheels from the ambient surface. The attachment thus overcomes the problem encountered when using such jacks on a soft surface, such as snow, sand, dirt or asphalt, of having the wheels embed and the jack "snow plow," or slip. The attachment is designed to remain attached to the jack after insertion, but to easily receive the jack and be removed from it. The attachment also aids in handling the jack and limits or eliminates undesirable rolling, for example, when the jack is stored in the trunk of an automobile.

Abstract: A machine stepper has a machine-supporting platform that normally stands on the floor by means of fixed support posts. A substantially rectangular frame is provided underneath this platform and can shift relative to it. This frame is constituted by a pair of generally parallel longitudinal members and a pair of generally parallel transverse members pivoted together at corners at each of which is provided a respective upright and vertically extensible leg. Two of the diagonally opposite legs pivot about respective longitudinally extending horizontal pivot axes and the other two legs pivot about respective transverse horizontal pivot axes. Cylinders are provided for horizontally shifting the frame relative to the platform so that when the legs have been extended to lift the posts of the platform off the ground these cylinders can step the platform horizontally and when the expansible legs are shortened it is set back down on the floor.

Abstract: A jacking assembly for positioning portable structures, mobile homes or the like includes at least two vertically operating jacks arranged as a pair on an elongated roller bed, which may be arranged in a parallel fashion with a second pair of jacks on a second roller bed. A horizontal operating jack associates one vertically operating jack with the roller bed to provide movement thereto. An adjustable link interconnects the one vertically operating jack on the roller bed so that the movement imposed upon the one vertically operating jack of the pair by the horizontal jack is translated to the other vertically operating jack. A hydraulic control system is provided to selectively actuate individual jacks from a position remote of the roller beds.

Abstract: A method and fixture for lateral and longitudinal positioning of mobile home or modular housing units on the foundation site is disclosed, particularly related to positioning more than one module sometimes referred to as double wide or other structural units, such as modular subunits with respect to each other incidental to assembly operations. The method includes the procedure of initially installing one of the double wide or other structural unit on a foundation including a plurality of stanchions, positioning a second structural unit adjacent the position of the first structural unit with a clearance space therebetween for carrying out steps preparatory to joining of the units, the second unit being positioned on a series of temporary cross beams supported on the foundation stanchions and engaging the structural units underframe members.

Abstract: A mobile transporter for use in transporting equipment during the construction of a building, said transport comprising a lower section supported on ground engaging means for movement thereon, a mast supported within the lower section for vertical movement relative to the lower section, with an upper frame supported on the upper end of the mast. The lower end of the mast carries a ground engaging support structure, and hydraulic lifting means are interconnected between the mast and support structure arrangement and the lower section for lowering and raising the mast and support structure between a position wherein the lower section is supported on the ground engaging means and a position whereby the support structure is moved to a ground engaging position for subsequently lifting the lower section and its ground engaging means off the ground whereby the lower section is supported on the support structure.

Abstract: An apparatus and method wherein a pair of frame members each having four jacks and placed one upon another are provided with other jacks which are horizontally movable to change the relative position of the frame members, and the jacks are suitably operable sequentially to provide the frame members with a capacity to be moved freely within a dock, whereby a propeller or rudder for a large ship is held between a pair of scaffolds provided on the frame members and the article is then conveyed to the desired place and mounted in the desired position of the ship.