An apparatus including an inspection apparatus for inspecting an artefact, and a transfer mechanism for moving a pallet on which an artefact is located relative to the inspection apparatus so as to move the pallet to and from an inspection location, and further including at least one pallet lifter which can be actuated between a retracted and an extended configuration, configured such that when a pallet is at the inspection location the at least one pallet lifter can be actuated to its extended configuration so as to engage with and lift the pallet and thereby decouple the pallet from the transfer mechanism.

Apparatus and methods for lifting loads are described. The load lift includes a support frame and a lift assembly with main cylinder and at least one standby cylinder connecting a rotatable cross beam with a clamp plate. A rotary actuator assembly is connected to the lift beam to move the lift assembly out of the way while not in use by rotating the lift assembly from a lift position to a standby position.

A system, apparatus, and method for leveling a borehole or blasthole drilling machine, or portion thereof, provided over a drilling site can implement a ground contact detect phase or operation, a first coarse leveling phase or operation, a lowering phase or operation, and a fine leveling phase or operation. The phases or operations can be based on or responsive to signals from sensors of the drilling machine. The phases or operations can involve changing length of one or more of the jacks of the drilling machine when the drilling machine is positioned over the drilling site.

A system, apparatus, and method for leveling a borehole or blasthole drilling machine, or portion thereof, provided over a drilling site can implement a ground contact detect phase or operation, a first coarse leveling phase or operation, a lowering phase or operation, and a fine leveling phase or operation. The phases or operations can be based on or responsive to signals from sensors of the drilling machine. The phases or operations can involve changing length of one or more of the jacks of the drilling machine when the drilling machine is positioned over the drilling site.

A modular boost system can be added to a jack to enable greater lift capacity of the jack. One example can involve a jack that is positionable at a well surface for moving a tubing string through a wellbore in a subterranean formation. The jack can include a frame and an adjustable plate that is alternately (i) attachable at a stationary location in the frame for fixing the adjustable plate at the stationary location or (ii) detachable from the stationary location in the frame to enable the adjustable plate to vertically move within the frame. A boost cylinder can be removably coupled to the adjustable plate and a base for selectively supplying an additional lift capability to the jack.

A modular boost system can be added to a jack to enable greater lift capacity of the jack. One example can involve a jack that is positionable at a well surface for moving a tubing string through a wellbore in a subterranean formation. The jack can include a frame and an adjustable plate that is alternately (i) attachable at a stationary location in the frame for fixing the adjustable plate at the stationary location or (ii) detachable from the stationary location in the frame to enable the adjustable plate to vertically move within the frame. A boost cylinder can be removably coupled to the adjustable plate and a base for selectively supplying an additional lift capability to the jack.

A lift structure with adjustment assistance optimized based on ergonomics includes a top, a base, an X-shaped cross arm and a gas spring, wherein the X-shaped cross arm includes a first directional arm and a second directional arm; wherein one end of the gas spring rotates around a second rotating shaft fixed relative to the first directional arm, and the other end rotates around a third rotating shaft fixed relative to the second directional arm, and the first, second and third rotating axes being parallel with each other; and wherein at the reference height, in a plane where an axis of the gas spring is located and is perpendicular to the respective rotating axes, the axis of the gas spring is tangent to a circumference centered on the first rotating shaft and having a set radius, with a tangent point being located on the second rotating shaft.

The present invention provides a double parallelogram vertical lifting device comprising a linkage mechanism and a pushing device. The linkage mechanism comprises a first shaft seat, a second shaft seat, a third shaft seat, an upper support unit movably coupled to the first shaft seat and the second shaft seat on both ends, and a lower support unit movably coupled to the second shaft seat and the third shaft seat on both ends. The upper support unit is provided with a first gear, and the lower support unit is provided with a second gear that meshes with the first gear. The pushing device has one end set on the upper support unit and the other end set on the lower support unit. The invention utilizes the interaction of the first gear and the second gear to generate a reaction force, which enables the lower support unit to cooperate with the upper support unit to move up and down synchronously, and achieves the effect of simple structure and large load capacity.

The lifting/lowering device (100) includes: a first plate member (51); a second plate member (52) to which the first plate member (51) is rotatably connected; a first expansion and contraction bag (31) which is disposed between the first plate member (51) and the second plate member (52) and is capable of expanding and contracting by gas supply and exhaust; a third plate member (53) to which the second plate member (52) is rotatably connected; a second expansion and contraction bag which is disposed between the second plate member (52) and the third plate member (53) and is capable of expanding and contracting by gas supply and exhaust. The first plate member (51), the first expansion and contraction bag (31), the second plate member (52), the second expansion and contraction bag (32) and the third plate member (53) are disposed so as to overlap in a plan view.

A self-contained electric double-acting hydraulic cylinder jack for lifting objects is provided, comprising a vertically elongated upper housing section and lower housing section, which are slidably assembled on each other to form a self-contained assembly, a hydraulic electric linear actuator placed between the upper housing and lower housing sections, which actuator comprises an integrated motor, pump, valve, and double-acting cylinder, an on-board battery for supplying power to the hydraulic electric linear actuator, and a momentary on-off-on toggle switch conjugated in electrical connection with the battery to actuate the actuator.