A submergible furniture is disclosed. Said submergible furniture comprises a threaded plugs, an outer shell and an internal cavity is configured to be partially submerged in a external body of liquid having a external liquid level. Said internal cavity is sealed by said outer shell and said threaded plugs. Said internal cavity comprises a gas portion and a liquid portion. Said liquid portion comprises an internal liquid level. Said submergible furniture is configured to be partially submerged in a external body of liquid. Said internal liquid level is higher than said external liquid level. Said internal cavity is selectively sealed with said threaded plugs. Said threaded plugs comprises a female plug portion and a male plug portion. Said female plug portion is welded into a portion of said outer shell. Said female plug portion is plastic welded into a portion of said outer shell.

A base for a chair is described. The example base for the chair includes a central support coupled to a seat pan of the chair, a first pair of legs extending radially from the central support, and a second pair of legs extending radially from the central support. The first pair of legs extend in a direction opposite the second pair of legs. A first angle between the first pair of legs is larger than a second angle between the second pair of legs.

A chair back assembly includes a back shell member including laterally extending top, bottom and side portions cooperating to define an open space therebetween, where a portion of the back shell member is located in a lumbar region, a cover having a first surface and a second surface opposite the first surface, wherein the cover covers at least a portion of the open space, and a back frame assembly operably supporting the back shell member and movable between upright and reclined positions, wherein the back frame assembly causes the back shell to flex in a fore-to-aft direction as the back frame assembly is moved between the upright and reclined positions independent of an external force being exerted on the back shell member, and where the lumbar portion of the back shell member remains spaced from the back frame as the back frame is moved between the upright and reclined positions.

A chair comprising: a metal frame formed by a plurality of metal elements, including a seat portion having two seat support elements and a backrest portion having two backrest support elements extending upwardly from the seat portion, a flexible backrest panel and/or a flexible seat panel of plastic material having two lateral hollow portions into which respective support elements are inserted, wherein, in a rest condition, there is a transverse clearance between outer edges of said lateral hollow portions and the respective support elements and wherein, in a deformed condition of the flexible backrest panel and/or flexible seat panel said transverse clearance is reduced to zero.

A mobile body unweighted sit and stand chair assembly prevents repetitive stress from sitting, standing, and lifting objects for long periods. The assembly provides a vertically, rotatably, and pivotally adjustable seat, a restrictive support padding that rotates from a support bracket to selectively support the spine or the pelvis, and a frame for structural integrity, mobility, and steering. The seat supports the buttocks and the ischium region of the pelvis, tilting forward up to 35 degrees to abut the pelvis against the support padding. This forward position maintains the spine in a straight posture and forces open posterior intervertebral disc space. The seat is supported by an adjustable rod that supports the weight of user while sitting, walking, kneeling, or lifting. A frame includes wheels that enable mobility and a brake. A first bracket enables feet to steer for hands-free maneuverability. A second bracket provides balance during kneeling and lifting.

A self-adjusting furniture glide attachable to an article of furniture is described. The self-adjusting furniture glide comprises an outer shell comprising an upper portion and a lower portion, wherein the upper portion and the lower portion are joined together to form a hollow cavity and a center member disposed in the outer shell. The center member is seated in the outer shell above a cup-shaped cushion, and comprises a means capable of attaching the self-adjustable furniture guide to an article of furniture attached to a top surface of the center member. The center member is capable of vertical movement within the outer shell and the vertical movement of the center member in the outer shell compresses the cup-shaped cushion.

The embodiments relate to a geometric under structure, central and outer hub for a GFN plastic chair base. The geometric shape and dimensions are critical components to the overall strength of the chair base hub and arms when either vertical or rotational forces are applied at the central hub. The central hub is of sufficient thickness to maintain dimensional stability when the forces are applied. The overall geometry and material composition enable the hub area to be constructed with minimal plastic wall thickness while optimizing the physical strength of the article and facilitating high production rate.

A work chair includes a chair body, a plurality of wheel sets mounted at the bottom side of the chair body, a seat cushion mounted at the top side of the peripheral wall of the chair body, two guide rails mounted at the chair body at one lateral side each defining a longitudinal sliding slot and locating notch in communication with the sliding slot, a tray, a pivot bolt pivotally connecting the tray to the sliding slots of the rail for allowing the tray to be moved along the sliding slots of the guide rails and having an engagement portion for selectively engaging in one locating notch of each guide rail to hold the tray positively at the selected elevational position for carrying tools.

Joystick chair is an input device for interaction between the user and computer. It enables the movement of the user in games. The invention is used by placing feet on the platform (3) and sitting or leaning on the seat (23). Command for turning is achieved by rotating the seat (23), either to the left or to the right. Command for forward movement is issued by pulling the left or right controller (36, 41) with fingers, while the command for backward movement is issued by pushing the left or right controller (36, 41) away by palms. Control handles for lateral movement (49, 56) are separated from the forward-back controls that are located on the controllers (36, 41). Other commands are achieved with buttons on the left and right controller and they are accessible with thumbs. The software allows the modifications of all available actions of the invention.

Chairs, seating systems, chair sub-assemblies and sub-systems, and associated methods of assembly and use. Aspects relate to chairs and methods of assembling chairs including chair controls of a relatively compact and effective design with desirable synchronous raising and tilting motions. Aspects also relate to tilt lock assemblies for achieving secure and effective tilt securement. Additional aspects relate to forward and rearward adjustment, or extension and retraction, of a seating assembly of the chair.