The present invention relates to inspection and repair of piping, pipe supports and other often elevated cable racks on chemical, metallurgical and other industrial plants. In particular, the invention relates to devices and systems for lifting or raising heavy objects relatively short heights. More specifically, the invention relates to a jack system and a jack used with said system.

A lift device includes a base, a platform that is repositionable relative to the base between a fully raised position and a fully lowered position, a scissor assembly coupling the base to the platform, and a booster. The scissor assembly includes a scissor layer including a first scissor arm pivotally coupled to a second scissor arm, a pulley coupled to the scissor layer, a tensile member wrapped around the pulley, and an actuator configured to vary a working length of the tensile member such that the first scissor arm rotates relative to the second scissor arm to move the platform relative to the base. A booster is positioned to engage a portion of the tensile member and apply an upward force on the scissor assembly when the platform is in the fully lowered position.

A lifting mechanism of an automated guided vehicle includes: a carrier tray; a base plate; a connecting rod module connected between the carrier tray and the base plate and configured to cause the carrier tray to translate along a first direction; and a lifting module, which is arranged on the base plate, connected to the connecting rod module and located on one side of the connecting rod module and configured to cause the carrier tray to translate by means of driving the connecting rod module, wherein the first direction is a lifting direction of the lifting module lifting the connecting rod module or a direction opposite to the lifting direction. An automated guided vehicle is also disclosed.

A lift device including a base, a platform that is repositionable relative to the base between a raised position and a lowered position, a scissor assembly coupling the base to the platform, and a booster positioned to apply an upward force on the scissor assembly when the platform is in the lowered position. The scissor assembly includes a scissor layer including a first scissor arm pivotally coupled to a second scissor arm, a tensile member coupled to the scissor layer, and a motor configured to apply a tensile force onto the tensile member to move the platform relative to the base.

A portable lifting apparatus is provided. The apparatus has a modular frame comprising a first frame member and a second frame member, which in combination support a load-bearing beam having a lifting device secured thereto above a lifting surface. The first frame member, the second frame member, and the lifting device are each removably secured to the beam such that the apparatus may be disassembled into constituent components for transport or storage. Each frame member may be configured to disassemble into constituent components comprising a base and two or more support rails. The apparatus may further comprise a counterbalance. The counterbalance may serve to balance load distribution when the apparatus in use and act as a storage receptacle for the first and second frame members, the beam, and the lifting device when the apparatus is disassembled.

A scissor lift table (1) has a first base element (2) and a second base element (3) and a scissor (4). The scissor (4) has a first scissor part (6) and a second scissor part (7), wherein the first scissor part (6) and the second scissor part (7) are pivotable relative to one another about a scissor axis (5). The first base element (2) and the second base element (3) are connected by the scissor (4) such that a pivoting of the scissor parts (6, 7) relative to one another about the scissor axis (5) causes a change in the distance between the first base element (2) and the second base element (3), wherein the first scissor part (6) is pivotably borne on the first base element (2) using a fixed bearing (10) and the second scissor part (7) is displaceably and pivotably borne on the first base element (2) using a floating bearing (11). The scissor lift table (1) is designed such the first scissor part (6) may be pivotably fixed relative to the first base element (2) about a temporary pivot axis (12) and a mechanical connection (14) between fixed bearing (10) and first base element (2) may be disconnected and the position of the pivot axis is selected such that when the first scissor part (6) is fixed and the mechanical connection (14) is disconnected, reducing the distance between the first base element (2) and second base element (3) causes an increase in the distance between the first base element (2) and the fixed bearing (10).

The present invention relates to inspection and repair of piping, pipe supports and other often elevated cable racks on chemical, metallurgical and other industrial plants. In particular, the invention relates to devices and systems for lifting or raising heavy objects relatively short heights. More specifically, the invention relates to a jack system and a jack used with said system.

A load-compensating device for a lifting application with an object to be lifted or lowered includes a movable platform, wherein the platform carries the object and, for purposes of load compensation, the platform is supported by at least one spring element that acts on a spreading unit which, in order to achieve spreading, transfers a spring force of the spring element into a scissors arrangement, where, by virtue of the scissors arrangement, the spring force results in a lifting force that produces a lifting action on the platform, and where a substantially constant lifting force is provided over a substantial lifting distance of the platform by the lifting geometry formed via the spreading unit and the scissors arrangement.

A load-compensating device for a lifting application with an object to be lifted or lowered includes a movable platform, wherein the platform carries the object and, for purposes of load compensation, the platform is supported by at least one spring element that acts on a spreading unit which, in order to achieve spreading, transfers a spring force of the spring element into a scissors arrangement, where, by virtue of the scissors arrangement, the spring force results in a lifting force that produces a lifting action on the platform, and where a substantially constant lifting force is provided over a substantial lifting distance of the platform by the lifting geometry formed via the spreading unit and the scissors arrangement.

An extendable lift assembly for a vehicle, including a sliding rail assembly, including a plate slidably connected to the vehicle, and a knuckle arm pivotably connected to the plate, a first platform pivotably connected to the knuckle arm, and a second platform extending from and pivotably connected to the plate.