A modular armrest system for mounting to a seat having a seat bottom with a lower surface and opposed first and second lateral sides. The system includes an elongated base plate that extends below the lower surface of the seat bottom and having at least one aperture that receives at least one fastener adapted to connect the elongated base plate to the seat bottom, and having opposed first and second ends proximate the respective opposed lateral sides. A first armrest assembly has a first mounting bracket having a horizontal portion connected to the first end of the elongated base plate and an upward extending portion connected to a generally horizontal arm support, and a second armrest assembly has a second mounting bracket having a horizontal portion connected to the second end of the elongated base plate and an upward extending portion connected to a generally horizontal arm support.

A swivel chair provided with length-adjustable leg tubes, a chair frame assembly, a seat leg connection assembly, and a leg tube assembly rotatably connected with the chair frame assembly through the seat leg connection assembly, wherein the chair frame assembly includes a chair cloth, two turning bases, two turning base reinforcing pieces, and a back tube.

A swivel chair provided with length-adjustable leg tubes, a chair frame assembly, a seat leg connection assembly, and a leg tube assembly rotatably connected with the chair frame assembly through the seat leg connection assembly, wherein the chair frame assembly includes a chair cloth, two turning bases, two turning base reinforcing pieces, and a back tube.

A foldable chair includes a lower hub assembly and an upper hub assembly. The lower hub assembly has foldable legs for supporting the chair. The upper hub assembly has a plurality of bars, and webbing mounted on the bars. The bars are movable so that the webbing can be folded and unfolded. The webbing provides a seating area when unfolded. The chair also includes a center shaft assembly that facilitates tilting and swiveling of the seating area in relation to the lower hub assembly.

A foldable chair includes a lower hub assembly and an upper hub assembly. The lower hub assembly has foldable legs for supporting the chair. The upper hub assembly has a plurality of bars, and webbing mounted on the bars. The bars are movable so that the webbing can be folded and unfolded. The webbing provides a seating area when unfolded. The chair also includes a center shaft assembly that facilitates tilting and swiveling of the seating area in relation to the lower hub assembly.

A chair comprises a seat pan member, a seat back member having a lumbar support member, a lumbar support assembly operatively connected to the lumbar support member and configured for moving the lumbar support member, with respect to the seat pan member and the seat back member, between at least a first position and a second position, and an actuator configured to operate the lumbar support assembly for movement of the lumbar support member between at least the first position and the second position. When the lumbar support member is in the second position, the lumbar support member is positioned forwardly, in a direction toward the seated user's lower back, relative to the seat back member so as to enable the user to be seated forwardly on the seat pan member while being engaged with the lumbar support member.

A chair comprises a seat pan member, a seat back member having a lumbar support member, a lumbar support assembly operatively connected to the lumbar support member and configured for moving the lumbar support member, with respect to the seat pan member and the seat back member, between at least a first position and a second position, and an actuator configured to operate the lumbar support assembly for movement of the lumbar support member between at least the first position and the second position. When the lumbar support member is in the second position, the lumbar support member is positioned forwardly, in a direction toward the seated user's lower back, relative to the seat back member so as to enable the user to be seated forwardly on the seat pan member while being engaged with the lumbar support member.

A chair, such as a conference or office chair, includes a seat support; a backrest support; a storage member formed as a force storage element; and a transmission coupling the seat support with the backrest support which allows a pivoting of the backrest support and the seat support between an upright position and a backwardly pivoted position according to a predetermined sequence of movements. The force storage element is coupled with the seat support and the backrest support such that the predetermined sequence of movements is facilitated and the storage member provides a force restoring in the upright position and wherein the flexibly elastic storage member forms in conjunction at least with a first articulated rotation point of the transmission a kinematic chain.

A chair, such as a conference or office chair, includes a seat support; a backrest support; a storage member formed as a force storage element; and a transmission coupling the seat support with the backrest support which allows a pivoting of the backrest support and the seat support between an upright position and a backwardly pivoted position according to a predetermined sequence of movements. The force storage element is coupled with the seat support and the backrest support such that the predetermined sequence of movements is facilitated and the storage member provides a force restoring in the upright position and wherein the flexibly elastic storage member forms in conjunction at least with a first articulated rotation point of the transmission a kinematic chain.

A detachable seat includes an elongate support bar including a first bracket and a second bracket each positioned adjacent opposing ends of the elongate support bar, a seat support frame including a first support member and a second support member affixed to the first support member, a hinge pivotally connecting the first support member to the elongate support bar, a seat mounted on the second support member, the seat support frame and the seat pivoting around the elongate support bar upon pivotal movement of the first support member, and a retaining arm affixed to and extending from the elongate support bar adjacent the first bracket, the retaining arm including a plurality of alignment apertures formed along a length thereof