The present invention relates generally to a furniture support structure that can be used, for example, on beds, desks, tables, chairs, and other furniture. In some embodiments, a furniture support structure comprises a hollow elongated metal tube having a first end and a second end, wherein the first end is crimped and comprises a hollow circular cross-section and wherein at least a portion of the inner surface of the hollow circular cross-sectional portion of the first end is threaded. Some embodiments of the present invention also relate to devices for adjusting the height of a furniture item.

The present invention relates generally to a furniture support structure that can be used, for example, on beds, desks, tables, chairs, and other furniture. In some embodiments, a furniture support structure comprises a hollow elongated metal tube having a first end and a second end, wherein the first end is crimped and comprises a hollow circular cross-section and wherein at least a portion of the inner surface of the hollow circular cross-sectional portion of the first end is threaded. Some embodiments of the present invention also relate to devices for adjusting the height of a furniture item.

A stool comprises a height-adjustable seat. The seat is coupled to a stem of the stool using a ball and socket mechanism. The ball and socket mechanism enables the seat to be tiltable up to 20 degrees in all directions about a vertical axis. The ball and socket mechanism aids in providing the seated individual with an increased range of motion. The range of tiltable motion can be adjusted using an adjustment member.

The present invention relates to a screw arrangement (10), comprising: a drive unit (16) for introducing a torque into the screw arrangement, a drive element (24) driven in rotation about a main axis (A) of the screw arrangement by the drive unit (16) and having an external thread (30), and a driven element (12) having an internal thread (32), which is in threaded engagement with the drive element (24). The invention further relates to a seat arrangement.

The present invention relates to a screw arrangement (10), comprising: a drive unit (16) for introducing a torque into the screw arrangement, a drive element (24) driven in rotation about a main axis (A) of the screw arrangement by the drive unit (16) and having an external thread (30), and a driven element (12) having an internal thread (32), which is in threaded engagement with the drive element (24). The invention further relates to a seat arrangement.

Joint arrangement (10) has a hollow cylindrical receiving cylinder (20) that extends in a cylinder axis direction (Z) and receives one end of a chair column (30) of an active-dynamic wobble chair, the latter movably mounted in a substantially hollow cylindrical outer joint shell (40) composed of joint shell segments (45). Movable mounting of receiving cylinder (20) is achieved by deformable elastic elements (50) arranged to be variable in shape and position in a bearing gap (60) between an outer wall portion (21, 22) of the receiving cylinder (20) and an inner wall portion (41, 42) of the joint shell (40). Receiving cylinder (20) is actuated in a force-dependent manner, whereby shape and/or position of the elastic elements (50) change as viewed in a radial direction (Rs) from changing, preferably reducing, clearance of the bearing gap (60) when the receiving cylinder (20) is actuated in a cylinder axis direction (Z).

A chair is provided. The chair includes a seat having an adjustable seat height; a central column extending from the seat; a central hub having a central opening that receives the central column; a plurality of plate legs with inner and outer leg ends, each of the plurality of plate legs being spaced around the central hub and extending radially outward from the central hub and including a frame; and, a plurality of wheel assemblies, whereby each one respective wheel assembly is coupled to a respective one plate leg of the plurality plate legs. Each of plurality of plate legs includes a bracket extending substantially horizontally outward and away from the frame and defines a hole. Each wheel assembly includes a portion configured to align with each hole of each bracket of each of the plurality of plate legs to couple each wheel assembly to each respective plate leg.

A chair is provided. The chair includes a seat having an adjustable seat height; a central column extending from the seat; a central hub having a central opening that receives the central column; a plurality of plate legs with inner and outer leg ends, each of the plurality of plate legs being spaced around the central hub and extending radially outward from the central hub and including a frame; and, a plurality of wheel assemblies, whereby each one respective wheel assembly is coupled to a respective one plate leg of the plurality plate legs. Each of plurality of plate legs includes a bracket extending substantially horizontally outward and away from the frame and defines a hole. Each wheel assembly includes a portion configured to align with each hole of each bracket of each of the plurality of plate legs to couple each wheel assembly to each respective plate leg.

A chair is provided. The chair includes a seat having an adjustable seat height; a central column extending from the seat; a central hub having a central opening that receives the central column; a plurality of plate legs with inner and outer leg ends, each of the plurality of plate legs being spaced around the central hub and extending radially outward from the central hub and including a frame; and, a plurality of wheel assemblies, whereby each one respective wheel assembly is coupled to a respective one plate leg of the plurality plate legs. Each of plurality of plate legs includes a bracket extending substantially horizontally outward and away from the frame and defines a hole. Each wheel assembly includes a portion configured to align with each hole of each bracket of each of the plurality of plate legs to couple each wheel assembly to each respective plate leg.

A chair is provided. The chair includes a seat having an adjustable seat height; a central column extending from the seat; a central hub having a central opening that receives the central column; a plurality of plate legs with inner and outer leg ends, each of the plurality of plate legs being spaced around the central hub and extending radially outward from the central hub and including a frame; and, a plurality of wheel assemblies, whereby each one respective wheel assembly is coupled to a respective one plate leg of the plurality plate legs. Each of plurality of plate legs includes a bracket extending substantially horizontally outward and away from the frame and defines a hole. Each wheel assembly includes a portion configured to align with each hole of each bracket of each of the plurality of plate legs to couple each wheel assembly to each respective plate leg.