The drive device of the lifting apparatus includes an electric actuator 91, a movable part 93 that is driven and moved by an electric actuator 91, a first link member 951L (951R), a second link member 953L (953R) rotatably coupled to the first link member 951L (951R) via a shaft member 952L (952R), and a guide member 97L (97R) having a guide hole 971L (971R) for guiding the shaft member 952L (952R) that moves with the movement of the movable part 93. The lifting platform 50 is raised and lowered by vertically extending and retracting a pair of lower right and left X-shaped arms 71L (71R) and a pair of upper right and left X-shaped arms 75L (75R) via the first link member 951L and second link member 953L along with movement of the movable part 93.

An electric load lifting apparatus includes a rectangular lower frame, a rectangular upper frame, two lower pairs of scissors type levers, a transverse rod, two upper pairs of scissors type levers, a rear transverse member, a front transverse member having a handle, a support secured to the front transverse member, and a servo motor secured to the support and including a threaded shaft rotatably disposed through an internally threaded sleeve of the rear transverse member. The servo motor is activated to rotate the threaded shaft in a first direction to lower the internally threaded sleeve, thereby collapsing the upper frame or in a second direction opposing the first direction to lift the internally threaded sleeve, thereby extending the upper frame upward.

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 pli) 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 pli) 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.

An accessory device for use with an automated guided vehicle (AGV) to assist loading and unloading of components onto the AGV for transport by the AGV. In one example, an electric motor, two lifting devices and an inverted omega-shaped upper platform are used to selectively raise and lower the component. In another example an accessory is positioned on a central portion of the upper platform to engage a pallet to further assist loading, unloading and positioning of the pallet relative to the AGV.

A personal lift mechanism and method are disclosed. The personal lift mechanism comprises: a lift having a base structure which pivotally retains a pair of struts which are pivotally coupled with a lift platform; an actuator coupled with at least one of the pair of struts; and a damper coupled with the actuator and operable to dissipate kinetic energy transferred between the lift platform and the actuator. In this way, less mechanically-robust components are required for the lift mechanism, damage to those components and the actuator is less likely, and any load on the lift platform and/or base structure will experience reduced shock due to the energy being instead dissipated within the damper.

A medical image scanning system includes a top plate on which an object is placed, a drive screw shaft, and a fall prevention unit. The fall prevention unit includes a load support nut that is threadedly engaged with the drive screw shaft and to which the load of the top plate is applied; a fall prevention nut that is arranged below the load support nut and is threadedly engaged with the drive screw shaft; a rotation prevention mechanism that prevents the rotation of the load support nut; and a detent mechanism that performs the turning stop of the fall prevention nut and releases the turning stop of the fall prevention nut when the threaded engagement between the drive screw shaft and the load support nut is disconnected.

A storage device for a vehicle is disclosed. In one embodiment, the storage device has an exterior housing, an interior container, and a scissor lift mechanism. The scissor lift mechanism is located within the exterior housing and is operatively connected to the interior container. The scissor lift mechanism has a raised position and a lowered position. The interior container is within the exterior housing when the scissor lift mechanism is in the lowered position. The interior container is at least partially located outside the exterior housing when the scissor lift mechanism is in the raised position. The scissor lift mechanism includes crossed bars that pivot about a bolt or pin in scissor-like fashion to raise or lower the interior container. An actuator pivots the cross bars to the raised position and is oriented and connected to the crossed bars to have an upward vertical force component throughout the raising operation.

A storage device for a vehicle is disclosed. In one embodiment, the storage device has an exterior housing, an interior container, and a scissor lift mechanism. The scissor lift mechanism is located within the exterior housing and is operatively connected to the interior container. The scissor lift mechanism has a raised position and a lowered position. The interior container is within the exterior housing when the scissor lift mechanism is in the lowered position. The interior container is at least partially located outside the exterior housing when the scissor lift mechanism is in the raised position. The scissor lift mechanism includes crossed bars that pivot about a bolt or pin in scissor-like fashion to raise or lower the interior container. An actuator pivots the cross bars to the raised position and is oriented and connected to the crossed bars to have an upward vertical force component throughout the raising operation.

An automobile jack includes a housing having opposed side and end walls defining an interior area. A ramp extends from the housing and includes upper and lower ends. A platform defines a tire-receiving surface. The automobile jack includes a first linkage having an upper arm pivotally connected to a lower arm along a first horizontal axis and a second linkage having an upper arm pivotally connected to a lower arm along a second horizontal axis. Each upper arm is pivotally connected to the platform and each lower arm is pivotally connected to the housing. A threaded yoke is coupled to the second linkage. The jack includes a power screw for selectively changing a distance between the first and second horizontal axes to move the platform between a retracted configuration at which the tire-receiving surface even with the ramp and a raised configuration above the ramp.

An electrically-lifted computer desk and office desk thereof, wherein the computer desk comprises a bottom plate, a driving mechanism, an intermediate support member, a first side-support member, a second side-support member and a face plate, wherein the driving mechanism is fixedly disposed on the bottom plate; the face plate is fixedly disposed on the first side-support member and the second side-support member; and the driving mechanism drives the face plate to rise or fold via the intermediate support member, the first side-support member and the second side-support member.