Provided is a raising and lowering apparatus which enables achievement of a design that enables a reduction in height of a stage in a raising and lowering direction while reducing the buckling of a push chain. The raising and lowering apparatus includes a push chain (10), a stage (12) , a guide (14), and a sprocket (16). The push chain has a first straight rod part (10A) that extends along a first direction (D1), a second straight rod part (10B) that extends along a second direction (D2), and a first bent part (10C) that is provided between the first straight rod part and the second straight rod part. The stage is formed on the first straight rod part and is raised and lowered along the first direction. The sprocket engages with a push chain on a side closer to the second straight rod part than to the first bent part.

Provided is a raising and lowering apparatus which enables achievement of a design that enables a reduction in height of a stage in a raising and lowering direction while reducing the buckling of a push chain. The raising and lowering apparatus includes a push chain (10), a stage (12) , a guide (14), and a sprocket (16). The push chain has a first straight rod part (10A) that extends along a first direction (D1), a second straight rod part (10B) that extends along a second direction (D2), and a first bent part (10C) that is provided between the first straight rod part and the second straight rod part. The stage is formed on the first straight rod part and is raised and lowered along the first direction. The sprocket engages with a push chain on a side closer to the second straight rod part than to the first bent part.

A continuously variable speed controller comprises an operating unit, an operation detector coupled to the operating unit to detect a continuous variation of an action of the operating unit, an information processor electrically connected to the operation detector to obtain a corresponding motor speed variation quantity based on a detection result from the operation detector, and a motor controller electrically connected to the information processor to receive the motor speed variation quantity and adjust a speed of the motor continuously based on the motor speed variation quantity. As such, speed control becomes more intuitive, and can achieve stepless speed change, while no need to set the speed switch to occupy the control and detection ports, simplifying structure of the product.

A continuously variable speed controller comprises an operating unit, an operation detector coupled to the operating unit to detect a continuous variation of an action of the operating unit, an information processor electrically connected to the operation detector to obtain a corresponding motor speed variation quantity based on a detection result from the operation detector, and a motor controller electrically connected to the information processor to receive the motor speed variation quantity and adjust a speed of the motor continuously based on the motor speed variation quantity. As such, speed control becomes more intuitive, and can achieve stepless speed change, while no need to set the speed switch to occupy the control and detection ports, simplifying structure of the product.

A vehicle support assembly mountable to a runway vehicle lift having a frame with a plurality of vertically oriented spaced apart support, a rack having a plurality of portions, wherein each portion is movably coupled to a different vertically oriented support, a runway vehicle support supported on the rack, a lift actuator coupled to the rack to move the rack and the runway vehicle support up and down. The vehicle support assembly comprising: a pair of carriage assemblies, each carriage assembly having an arm carriage and a two movable arms, each arm having a first end coupled to the arm carriage and a second end configured to engage an undercarriage of a vehicle; and a pair of posts wherein each post supports a carriage assembly, each post being movably coupled to the runway vehicle lift with a mount to move the post to and from a first position wherein the post is arranged vertically with the arms extended to support the vehicle above the runway vehicle support and a second storage position wherein the post is displaced from the first position.

A vehicle support assembly mountable to a runway vehicle lift having a frame with a plurality of vertically oriented spaced apart support, a rack having a plurality of portions, wherein each portion is movably coupled to a different vertically oriented support, a runway vehicle support supported on the rack, a lift actuator coupled to the rack to move the rack and the runway vehicle support up and down. The vehicle support assembly comprising: a pair of carriage assemblies, each carriage assembly having an arm carriage and a two movable arms, each arm having a first end coupled to the arm carriage and a second end configured to engage an undercarriage of a vehicle; and a pair of posts wherein each post supports a carriage assembly, each post being movably coupled to the runway vehicle lift with a mount to move the post to and from a first position wherein the post is arranged vertically with the arms extended to support the vehicle above the runway vehicle support and a second storage position wherein the post is displaced from the first position.

A vehicle support assembly mountable to a runway vehicle lift having a frame with a plurality of vertically oriented spaced apart support, a rack having a plurality of portions, wherein each portion is movably coupled to a different vertically oriented support, a runway vehicle support supported on the rack, a lift actuator coupled to the rack to move the rack and the runway vehicle support up and down. The vehicle support assembly comprising: a pair of carriage assemblies, each carriage assembly having an arm carriage and a two movable arms, each arm having a first end coupled to the arm carriage and a second end configured to engage an undercarriage of a vehicle; and a pair of posts wherein each post supports a carriage assembly, each post being movably coupled to the runway vehicle lift with a mount to move the post to and from a first position wherein the post is arranged vertically with the arms extended to support the vehicle above the runway vehicle support and a second storage position wherein the post is displaced from the first position.

A vehicle support assembly mountable to a runway vehicle lift having a frame with a plurality of vertically oriented spaced apart support, a rack having a plurality of portions, wherein each portion is movably coupled to a different vertically oriented support, a runway vehicle support supported on the rack, a lift actuator coupled to the rack to move the rack and the runway vehicle support up and down. The vehicle support assembly comprising: a pair of carriage assemblies, each carriage assembly having an arm carriage and a two movable arms, each arm having a first end coupled to the arm carriage and a second end configured to engage an undercarriage of a vehicle; and a pair of posts wherein each post supports a carriage assembly, each post being movably coupled to the runway vehicle lift with a mount to move the post to and from a first position wherein the post is arranged vertically with the arms extended to support the vehicle above the runway vehicle support and a second storage position wherein the post is displaced from the first position.

A system for following the handling of an aircraft engine includes a cradle which supports the engine and stands which are spread out under the cradle. Each stand includes a seating configured to secure the stand on the ground, an actuating cylinder secured to the seating and having a translationally mobile piston, a fixing structure secured to the exterior end of the piston and configured to be fixed to the cradle, and a fluid source which causes the piston to be raised or lowered. Each stand also includes a detector designed to detect an inappropriate movement of the piston and a blocking which blocks the piston from moving when the detector detects an inappropriate movement of the piston. Thus, when an inappropriate movement of the piston is detected, the blocking blocks the movement of the cradle and prevents it from tipping.

An improved system and method for bracing, transporting, assembling, and disassembly of drilling equipment at oil and gas land-based well sites. The system has a substructure with side boxes support bracing that are in a scissor jack (or grand plié) style bracing with telescoping tension link(s), linking pins, and vertical hydraulic cylinders. These linking pins are set after raising the substructure and secure the telescoping tension link, support arms, and support bracing in place to maintain the integrity of the substructure. Alternatively the system has a substructure with side boxes support bracing that are in a scissor jack (or grand plié) style bracing with screw jacks and a means of stabilization during substructure raising. The substructure bracing reduces the overall length, reduces the upper and lower box spans, and balances the raising loads, subsequently lowering the transport weight of the side box such that a commercial walking system may be integrated into the side box and remain there during transport while maximizing the operating drill floor height while minimizing the transport height.