Abstract: A folding table has a leg pivotally coupled to a bottom of a tabletop. A pair of links is pivotally coupled together and pivotally coupled in series between the tabletop and the leg. The pair of links, the tabletop and the leg form a four-bar, four-pivot linkage, including four pivots and four bars defined between the pivots. The bars of the linkage are sized and the pivots of the linkage are located to resist movement of the linkage through an intermediate binding configuration between open and closed configurations.

Abstract: A folding or stacking chair has a seat and a backrest carried between opposite frame sides each with a backrest support, a front leg and a rear leg. One or both of the seat and the backrest has a continuous sheet of flexible and elastic knitted mesh or patterned open texture plastic held across and substantially covering an opening in an open-end hoop coupled between the frame sides. An open-end of the hoop faces in a front or a back orientation for the seat, or a top or a bottom orientation for the backrest, with sides of the hoop attached to the frame sides. The sheet of mesh or textured plastic has a finished edge spanning the open-end of the hoop.

Abstract: A clamping joint for a chair includes a joint coupling a front leg and a rear leg to the seat at an overlap with an inner clamp coupled to the seat and an outer clamp coupled to the inner clamp with the front leg and the rear leg clamped between the inner and outer clamps at the overlap. A finger on one of the inner or outer clamps extends towards the other and disposed between the front and rear legs.

Abstract: A stackable chair has a seat and a backrest carried between opposite frame sides each with a backrest support, a front leg and a rear leg. One or both of the seat and the backrest have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic hoop fixed between the frame sides.

Abstract: A light-weight, folding table has a plurality of folding legs coupled to a table top. The table top includes a laminate with a plastic sheet bonded to a plywood layer. A perimeter edge channel encloses a perimeter edge of the laminate along the sides without enclosing corners of the laminate. Corner caps cover the corners of the laminate. The corner caps overlap ends of the edge channel at the corner.

Abstract: A folding mesh chair includes a seat and a backrest carried between opposite frame sides. The chair has an unfolded seating position in which the seat pivots to extend from the frame sides and bottoms of front and rear legs move apart, and a folded position in which the seat pivots toward the frame sides and the front and rear legs move together. One or both of the seat and the backrest have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic hoop fixed between the frame sides. The hoop includes inner and outer plastic mating hoops with the mesh extending over an outer perimeter of the inner hoop and into an interface between the inner and outer hoops.

Abstract: A folding mesh chair includes a seat and a backrest carried between opposite frame sides. The chair has an unfolded seating position in which the seat pivots to extend from the frame sides and bottoms of front and rear legs move apart, and a folded position in which the seat pivots toward the frame sides and the front and rear legs move together. One or both of the seat and the backrest have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic hoop fixed between the frame sides.

Abstract: A folding mesh chair includes a seat and a backrest carried between opposite frame sides. The chair has an unfolded seating position in which the seat pivots to extend from the frame sides and bottoms of front and rear legs move apart, and a folded position in which the seat pivots toward the frame sides and the front and rear legs move together. One or both of the seat and the backrest have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held across and substantially covering an opening in an all-plastic hoop fixed between the frame sides.

Abstract: A folding and stacking chair system includes a plurality of folding and stacking chairs having an unfolded seating position in which the chairs are configured for sitting upon, and a folded and stacked position in which the chairs are folded and stacked together. Each chair has a seat and a backrest carried between opposite frame sides each with a backrest support, a front leg and a rear leg. The seat and the backrest each have a continuous sheet of flexible and elastic mesh or patterned open texture plastic held between the backrest supports of the frame sides.

Abstract: A chair seat for flexibly supporting the buttocks of a user seated thereon. The chair seat includes a seat surface having a pair of adjacent or side-by-side concentric corrugated regions formed therein, and which are configured for flexibly supporting the buttocks of the user by being deflectable with respect to the seat surface. The seat surface further includes a third corrugated region surrounding and concentric with the pair of side-by-side corrugated regions, and which third region is configured for flexibly supporting the hips and thighs of the user while also being deflectable with respect to the seat surface.

Abstract: A tamper resistant attachment apparatus for attaching a backrest to a chair frame. A flap is foldably coupled to an edge of a chair backrest. The flap is foldable over onto the backrest into a folded position. The flap has a channel that fits around a frame of a chair when the flap is in the folded position. At least one aperture that extends through the flap can receive a corresponding pin that is coupled to the backrest when the flap is in the folded position. The at least one pin is deformable to secure the flap and backrest around the chair frame when the flap is in the folded position.

Abstract: A chair foot device for a wire frame chair stackable with other wire frame chairs includes a lower surface disposable on a support surface. An upper surface, opposite the lower surface is sized and shaped to carry the lower surface of an adjacent foot from an adjacently stacked upper chair. The chair foot also includes an alignment protrusion disposed on one of the lower and upper surfaces and an alignment indentation disposed on the other of the lower and upper surfaces. The alignment protrusion is sized and shaped to be receivable within an alignment indentation of a corresponding foot from an adjacently stacked chair. The foot is sized and shaped to carry an applied load from an adjacently stacked upper foot and to transfer the applied load to an adjacent load bearing surface. The foot is also sized and shaped to protect the wire frame chair from damage during stacking.

Abstract: A locking mechanism for a support leg hingedly attached to a support surface includes a base, attached to the support surface, with a plurality of angularly spaced, radial teeth, and a coupler, attached to the support leg, having a plurality of angularly spaced, radial teeth configured to mate with the teeth of the base. A selectively releasable engagement mechanism is configured to engage and disengage the teeth of the base with the teeth of the coupler, to allow selective rotation of the support leg between an extended position and a folded position, and to lock the leg in the extended or folded position.

Abstract: A chair with a flexible resilient back support structure includes a hollow tubular seat frame, a hollow tubular backrest frame pivotally connected to the seat frame, and a limit stop affixed to the backrest frame or the seat frame adjacent to the pivot points. The limit stop is configured to limit a degree of rotation of the backrest frame between an upright position and a maximum backwardly rotated position. An elongate spring element extends from within the backrest frame into the seat frame, and is configured to bias the backrest frame in the upright position, and to resiliently resist backward rotation. In various embodiments, a cam surface is associated with the spring element, providing an effective fulcrum point which moves rearwardly as the backrest frame reclines, thereby increasing the effective flexural resistance of the spring element during reclining.

Abstract: A chair with a flexible resilient back support structure includes a hollow tubular seat frame, a hollow tubular backrest frame pivotally connected to the seat frame, and a limit stop affixed to the backrest frame or the seat frame adjacent to the pivot points. The limit stop is configured to limit a degree of rotation of the backrest frame between an upright position and a maximum backwardly rotated position. An elongate spring element extends from within the backrest frame into the seat frame, and is configured to bias the backrest frame in the upright position, and to resiliently resist backward rotation. In various embodiments, a cam surface is associated with the spring element, providing an effective fulcrum point which moves rearwardly as the backrest frame reclines, thereby increasing the effective flexural resistance of the spring element during reclining.

Abstract: An upholstered folding chair includes a chair frame, a base member permanently attached to the frame, and an upholstered insert configured to slide into and removably interlock with either the base member or the chair frame. The base member includes a retaining rim, which covers and protects at least some of the edges of the upholstered insert, and the base member and upholstered insert may have interlocking members which become hidden between the base and insert when the two are interlocked together. The base can be either a back base for receiving and supporting an upholstered chair back insert, or a seat base for receiving and supporting an upholstered chair seat insert.