A power unit for a hydraulic floor jack is provided having a unitary forged steel manifold engaged with a ram assembly, the ram assembly and manifold being selected from materials and finishes that when interacting with a cylinder bearing, exhibits a longer performance life.

A power unit for a hydraulic floor jack is provided having a unitary forged steel manifold engaged with a ram assembly, the ram assembly and manifold being selected from materials and finishes that when interacting with a cylinder bearing, exhibits a longer performance life.

A method and apparatus for transporting heavy machinery, equipment or other heavy loads from one location to another, whereby the apparatus may be constructed as a walking machine including a plurality of lifting assemblies operative to lift the load above the supporting surface and then move the load relative to the supporting surface by transporting the load via rollers or tracks in the walking machines. In one example, the lifting assemblies are provided with separate longitudinal and lateral drive mechanisms independently operative for translating the load in either or both longitudinal and lateral directions.

A method and apparatus for transporting heavy machinery, equipment or other heavy loads from one location to another, whereby the apparatus may be constructed as a walking machine including a plurality of lifting assemblies operative to lift the load above the supporting surface and then move the load relative to the supporting surface by transporting the load via rollers or tracks in the walking machines. In one example, the lifting assemblies are provided with separate longitudinal and lateral drive mechanisms independently operative for translating the load in either or both longitudinal and lateral directions.

The invention provides a tool for moving a drivetrain component in a nacelle of a horizontal axis wind turbine, the nacelle comprising a nacelle structure, the component being connected, in operation of the wind turbine, to a rotor of the wind turbine, the tool comprising at least drive unit for moving the component in relation to the nacelle in a direction parallel to the rotational axis of the rotor, and a plurality of position adjustment devices adapted to be located between the nacelle structure and the component, and distributed so that rotational movement of the component can be provided by coordinated control of the position adjustment devices.

The invention provides a tool for moving a drivetrain component in a nacelle of a horizontal axis wind turbine, the nacelle comprising a nacelle structure, the component being connected, in operation of the wind turbine, to a rotor of the wind turbine, the tool comprising at least drive unit for moving the component in relation to the nacelle in a direction parallel to the rotational axis of the rotor, and a plurality of position adjustment devices adapted to be located between the nacelle structure and the component, and distributed so that rotational movement of the component can be provided by coordinated control of the position adjustment devices.

The present disclosure pertains to a trailer stroke extender for use in a hydraulic trailer system, adapted to be arranged between a first hydraulic trailer and a second hydraulic trailer. The system comprises a cradle frame and first and second hydraulic cylinders. The cradle frame has a first cradle-to-beam connector adapted to be connected to the first hydraulic trailer and has a second cradle-to-beam connector adapted to be connected to the second hydraulic trailer. The first and the second cradle-to-beam connectors are spaced apart from each other in a longitudinal direction of the trailer stroke extender. The first and second hydraulic cylinders are adapted to move a trailer load in a vertical direction relative to the cradle frame over a single stroke length. The hydraulic cylinders are arranged in the cradle frame at a distance from each other in a lateral direction of the trailer stroke extender.

A hydraulic jack for providing safety security is disclosed. The hydraulic jack comprises a hydraulic cylinder storing hydraulic fluid inside, and a piston installed in the hydraulic cylinder that is raised up from the hydraulic cylinder by a pressure of the hydraulic fluid stored in the hydraulic cylinder, thereby a heavyweight can be lifted by the piston. The piston has a drill hole on a body thereof that has a determined diameter and is perpendicular to the piston. When the piston is raised up, a safety pin is penetrable through the drill hole to secure the piston in place.

A hydraulic jack for providing safety security is disclosed. The hydraulic jack comprises a hydraulic cylinder storing hydraulic fluid inside, and a piston installed in the hydraulic cylinder that is raised up from the hydraulic cylinder by a pressure of the hydraulic fluid stored in the hydraulic cylinder, thereby a heavyweight can be lifted by the piston. The piston has a drill hole on a body thereof that has a determined diameter and is perpendicular to the piston. When the piston is raised up, a safety pin is penetrable through the drill hole to secure the piston in place.

A lifting device with a head cavity in the lifting member shaped to accept a removable lifting head. The head cavity in the lifting devicee.g., the piston of a bottle jackmay be provided with threads, or may have the threads removed. A yoke fitted on the lifting head provides registration, horizontal restraint, or both against a lifted object, component, or surface to prevent sliding off the lifting head while in use. In a smooth-walled-shaft embodiment, a set of risers (spacers, adjusters, trims, or shims) serves to adjust an extension height of the shaft, elevating the lifting head with respect to the piston prior to beginning to lift the hydraulic piston.