An apparatus for positioning an electronic display is described. The apparatus can be combined with an existing work surface to provide a multi-position workstation. In some cases, the apparatus includes a mounting portion configured to support an electronic display and a keyboard. The mounting portion may be movable with respect to the work surface between multiple positions, including for example, a sitting position and a standing position. Methods for positioning an electronic display and a keyboard are also included.

A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

A lifting table includes a top plate height adjustment device that performs a height adjustment of all support columns in a synchronized manner. The top plate is supported on the floor by of a leg structure provided with multiple support columns arranged in parallel. Top plate receiving structures attach a column to the top plate and change the length of the support columns. Push valves exposed on the inside of the top plate receiving structures are actuated, changing the length of gas springs provided inside of the support columns. By extending an operation rod unit into the top plate receiving structures from a single handle of an operation lever via a connection fitting, the push valves are operated the same amount and at the same time in all of the columns with a single operation, so that it is possible to smoothly raise and lower the top plate.

A mobile workstation comprises a wheeled base, a height-adjustable post assembly fixedly coupled to the rear end of the wheeled base, and a tray assembly fixedly coupled to the top of the post assembly. The post assembly has a four-post construction, with upper and lower vertical posts pivotally connected to a pair of linking posts. To accommodate different users, the post assembly is designed to articulate between an upper position and a lower position through a primarily vertical travel path. The four-post construction of the post assembly disperses the weight of the tray assembly, thereby reducing the manual force required to implement height adjustment. The planar, primarily vertical, travel path undertaken by the post assembly during height adjustment maintains the workstation center of gravity to a centralized location in the base, thereby minimizing the use of counterbalances to ensure stability. As a result, the workstation is lightweight and easily maneuverable.

A mobile workstation comprises a wheeled base, a height-adjustable post assembly fixedly coupled to the rear end of the wheeled base, and a tray assembly fixedly coupled to the top of the post assembly. The post assembly has a four-post construction, with upper and lower vertical posts pivotally connected to a pair of linking posts. To accommodate different users, the post assembly is designed to articulate between an upper position and a lower position through a primarily vertical travel path. The four-post construction of the post assembly disperses the weight of the tray assembly, thereby reducing the manual force required to implement height adjustment. The planar, primarily vertical, travel path undertaken by the post assembly during height adjustment maintains the workstation center of gravity to a centralized location in the base, thereby minimizing the use of counterbalances to ensure stability. As a result, the workstation is lightweight and easily maneuverable.

A steel wire self-locking mechanism and a lifting device are provided. The steel wire self-locking mechanism includes a surrounding plate and a self-locking gear and a locking device arranged in the surrounding plate, and uses a friction force of a threaded sleeve to lock the lifting device. The lifting device includes a lifting assembly and a beam assembly. The steel wire self-locking mechanism is arranged in the beam assembly, and the locking of the lifting device is realized by the steel wire self-locking mechanism. The steel wire self-locking mechanism and the lifting device have good adaptability. Due to a smaller volume, the steel wire self-locking mechanism is applicable to lifting tables in various sizes.

A gas spring system (3) for a height adjustable table (1) comprises a gas spring (4) having a gas spring cylinder (6) with a gas compartment (9) provided therein, a gas spring piston (7) arranged therein and a gas spring piston rod (8) joined thereto. The gas spring system (3) further comprises a gas interface (10), connected to the gas compartment (9), which at least inserts gas from outside into the gas spring system (3), a transfer cylinder (12) having a transfer piston (13), a first transfer chamber (14) and a second transfer chamber (15) separated by the transfer piston (13), and a hydraulic pump (16). The gas comportment (9) is connected to the first transfer chamber (14) and the hydraulic pump (16) is connected to the second transfer chamber (15). The hydraulic pump (16) conveys hydraulic oil and the transfer piston (13) is moved in direction towards the first transfer chamber (14) by the hydraulic oil conveyed by the hydraulic pump (16) in order to increase a pressure in the first transfer chamber (14) and in the gas comportment (9).

A gas spring system (3) for a height adjustable table (1) comprises a gas spring (4) having a gas spring cylinder (6) with a gas compartment (9) provided therein, a gas spring piston (7) arranged therein and a gas spring piston rod (8) joined thereto. The gas spring system (3) further comprises a gas interface (10), connected to the gas compartment (9), which at least inserts gas from outside into the gas spring system (3), a transfer cylinder (12) having a transfer piston (13), a first transfer chamber (14) and a second transfer chamber (15) separated by the transfer piston (13), and a hydraulic pump (16). The gas comportment (9) is connected to the first transfer chamber (14) and the hydraulic pump (16) is connected to the second transfer chamber (15). The hydraulic pump (16) conveys hydraulic oil and the transfer piston (13) is moved in direction towards the first transfer chamber (14) by the hydraulic oil conveyed by the hydraulic pump (16) in order to increase a pressure in the first transfer chamber (14) and in the gas comportment (9).

A supporting device for a height adjustable table (1) comprises a first (3) and a second supporting element (3′) respectively having a first, a second, and a third liner component (5, 5′, 6, 6′, 7, 7′) arranged in a manner displaceable relative to each other to cause a change of length (L) of the supporting elements (3, 3′). The first (5, 5′), the second (6, 6′) and the third liner component (7, 7′) are coupled such that a displacement of the second to the first liner component synchronously causes a displacement of the third to the second liner component. The supporting device comprises a synchronization device to synchronize the displacement of the second liner component (6, 6′) to the first liner component (5, 5′) or the displacement of the third liner component (7, 7′) to the second liner component (6, 6′) between the first and the second supporting elements.

A supporting device for a height adjustable table (1) comprises a first (3) and a second supporting element (3′) respectively having a first, a second, and a third liner component (5, 5′, 6, 6′, 7, 7′) arranged in a manner displaceable relative to each other to cause a change of length (L) of the supporting elements (3, 3′). The first (5, 5′), the second (6, 6′) and the third liner component (7, 7′) are coupled such that a displacement of the second to the first liner component synchronously causes a displacement of the third to the second liner component. The supporting device comprises a synchronization device to synchronize the displacement of the second liner component (6, 6′) to the first liner component (5, 5′) or the displacement of the third liner component (7, 7′) to the second liner component (6, 6′) between the first and the second supporting elements.