The invention relates to a chair (10) having a base (40) and a support (20), articulated thereon, that is coupled to a seating surface (11) and supports the latter, the seating surface (11) being connected to the support (20) rotatably or pivotably around a rotation axis (30) between a sitting position and a raised position, and the support (20) comprising at least one receiving region (28, 29) for aligned abutment of a juxtaposed chair (10) of identical design. Provision is made in this context that in the raised position, the seating surface (11) is pivoted out of the receiving region (28, 29) of the support (20) and exposes it. The result is to create a chair (10) that, for storage, can be juxtaposed in space-saving fashion with chairs (10) of identical design.

A chair in one aspect of the present invention comprises a leg body and a seat body. The leg body comprises a support frame that supports the seat body. The seat body comprises a frame body and a sheet-like member stretched across the frame body. The frame body has a positioning member provided on a back surface thereof that positions the seat body to be in a seatable state. An amount of protrusion of the positioning member is defined so that the positioning member contacts the frame body while a lowest part of the sheet-like member at the time the sheet-like member is deformed when a user sits down on the seat body is located above a top of the support frame.

A chair in one aspect of the present invention comprises a leg body and a seat body. The leg body comprises a support frame that supports the seat body. The seat body comprises a frame body and a sheet-like member stretched across the frame body. The frame body has a positioning member provided on a back surface thereof that positions the seat body to be in a seatable state. An amount of protrusion of the positioning member is defined so that the positioning member contacts the frame body while a lowest part of the sheet-like member at the time the sheet-like member is deformed when a user sits down on the seat body is located above a top of the support frame.

The invention discloses a pedestal apparatus for an article of furniture. The pedestal apparatus has an elongate post formation defining a first end and a second end and having a longitudinal axis. The post formation immovably supports a fixed foot arrangement and also movably supports a variable foot arrangement. The variable foot arrangement is selectively movable along and around the longitudinal axis for varying a longitudinal and angular proximity between the variable foot arrangement and the fixed foot arrangement. Biasing means are provided for controlling movement of the variable foot arrangement whereby, in use, the biasing means causes both the fixed foot arrangement and the variable foot arrangement to abut an underlying surface and thereby provide a substantial stabilization of the pedestal apparatus.

In a chair (1) and a backrest (30) for the chair of the invention, thin back plate extension parts (51) that are continuous with a front surface of a back plate part (31), thinned sections being formed in outside portions, in a width direction of the backrest, on the rear surface side; and reinforcing ribs (52) that protrude from inside end parts of the back plate extension parts (51) in the width direction of the backrest to a rear side are provided in regions of side edge support parts (32) above parts where fitting holes (33) are formed. The reinforcing ribs (52) extend substantially in an upward-downward direction, gradually increase in cross-sectional area on a bottom end side, are connected to the parts where the fitting holes (33) are formed. Additionally, a chair (1a, 101, 201) and a backrest (30) for the chair of the invention are provided with a plate-shaped back plate part (31) that receives a seated person's load, and a pair of side edge support parts (32) that are formed integrally with a pair of facing opposite sides of the back plate part (31) and function as strengthening members. A plurality of openings (34) for facilitating deformation of the back plate part (31) are formed in the back plate part (31). A curved part (35) that is curved toward an opposite back plate side extends from one end side of the back plate part (31). The openings (34) of the back plate part (31) formed in the vicinity of the curved part (35) are formed in the shape of an elongated hole in the extending direction of the side edge support parts (32), and are formed at least in a range covering the curved part (35).

A folding chair may include a frame that is configured to transition the folding chair between use and storage positions. A seat base may be pivotally coupled thereto at a first particular length from a front end and a receiving portion may be disposed in an upper surface. The receiving portion may include left and right lateral edges, front and rear longitudinal edges, and a depth. The padding material may be disposed in the receiving portion and may have a lateral dimension related to a distance between the front and the rear longitudinal edges, a longitudinal dimension related to a distance between the front and the rear longitudinal edges, and a thickness related to the depth. The padding layer may cover a majority of a top surface of the padding material and of the upper surface. The cover may retain the padding material and the padding layer relative to the seat base.

The invention discloses a pedestal apparatus for an article of furniture. The pedestal apparatus has an elongate post formation defining a first end and a second end and having a longitudinal axis. The post formation immovably supports a fixed foot arrangement and also movably supports a variable foot arrangement. The variable foot arrangement is selectively movable along and around the longitudinal axis for varying a longitudinal and angular proximity between the variable foot arrangement and the fixed foot arrangement. Biasing means are provided for controlling movement of the variable foot arrangement whereby, in use, the biasing means causes both the fixed foot arrangement and the variable foot arrangement to abut an underlying surface and thereby provide a substantial stabilization of the pedestal apparatus.

A chair system according to embodiments of the present invention includes a base comprising a seat for a user and one or more support legs, a back, and a flexible back support element rigidly coupled to the back and to the base, the flexible back support element comprising a flex zone, the flex zone comprising one or more notches, wherein the back is reclinable from an upright position to a reclined position, wherein the one or more notches are configured to narrow as the back reclines from the upright position to the reclined position, and wherein the one or more notches are open in the upright position and closed in the reclined position.

A seat includes a seat base including a seat base linkage, a backrest including a seat back linkage, a connector rod, and a frame. The seat base linkage is pivotally secured to the seat back linkage at a first pivot point. The seat base linkage is pivotally secured to the connector rod at a second pivot point. The connector rod is pivotally secured to the frame at a third pivot point. The seat back linkage is pivotally secured to the frame at a fourth pivot point. When the seat is adjusted between an opened position and a closed position, the first pivot point describes the arc of a circle.