A mechanism for raising and lowering an armrest for a seat includes an armrest, a rotatable hub, and an actuating linkage between the armrest and the hub, the rotatable hub having a cam that operates the actuating linkage to raise the armrest wherein the cam can rotate through a first angle of rotation where the actuating linkage is not operated a second angle of rotation where the actuating linkage is operated. The cam can rotate through a third angle of rotation where the actuating linkage is not operated, this angle being different to the first angle of rotation. The cam is torsionally linked to the rotation of a seat member.

A double action seating unit to be mounted to a nose of a platform is described. The double action seating unit includes a seat assembly, a back assembly and at least two stanchion. Each stanchion has a front bracket, a rear bracket, a stanchion tube and two pivot straps. The front bracket attaches the seat portion to the stanchion, the rear bracket attaches the stanchion to the nose of the platform and the stanchion tube attaches the back assembly to the stanchion. Each pivot strap connects an associated stanchion tube, the rear bracket and the front bracket. The double action seating unit can move between a use configuration and a storage configuration. The two pivot straps cause the seat assembly and the back assembly to simultaneously rotate when the double action seating unit moves between the use configuration and the storage configuration.

A double action seating unit to be mounted to a nose of a platform is described. The double action seating unit includes a seat assembly, a back assembly and at least two stanchion. Each stanchion has a front bracket, a rear bracket, a stanchion tube and two pivot straps. The front bracket attaches the seat portion to the stanchion, the rear bracket attaches the stanchion to the nose of the platform and the stanchion tube attaches the back assembly to the stanchion. Each pivot strap connects an associated stanchion tube, the rear bracket and the front bracket. The double action seating unit can move between a use configuration and a storage configuration. The two pivot straps cause the seat assembly and the back assembly to simultaneously rotate when the double action seating unit moves between the use configuration and the storage configuration.

A chair is provided with a seat support frame which may be comprised of at least two tubes spaced apart by a polymer connector. The seat support frame supports a foam cushion and the frame may be embedded in the foam and may include flexible supports across the support frame also embedded in the foam. A rigid panel has a cavity and the rigid panel is arranged adjacent an outer surface of said foam cushion with at least part of said foam cushion positioned within the cavity, wherein said rigid panel is affixed to said support frame and an inner surface of said rigid panel faces the outer surface of said foam cushion.

A chair is provided with a seat support frame which may be comprised of at least two tubes spaced apart by a polymer connector. The seat support frame supports a foam cushion and the frame may be embedded in the foam and may include flexible supports across the support frame also embedded in the foam. A rigid panel has a cavity and the rigid panel is arranged adjacent an outer surface of said foam cushion with at least part of said foam cushion positioned within the cavity, wherein said rigid panel is affixed to said support frame and an inner surface of said rigid panel faces the outer surface of said foam cushion.

A smart chair control system linked with a reservation is proposed. the system is configured to include: a reservation server (120); a chair control system server (130) configured to interwork with the reservation server (120) and receive ticket reservation information from the reservation server (120); a main controller (140) configured to communicate with the chair control system server (130); a sub-controller (150) configured to communicate with the main controller (140); and a chair control board (155) configured to control a chair of a grandstand by communicating with the sub-controller.

A smart chair control system linked with a reservation is proposed. the system is configured to include: a reservation server (120); a chair control system server (130) configured to interwork with the reservation server (120) and receive ticket reservation information from the reservation server (120); a main controller (140) configured to communicate with the chair control system server (130); a sub-controller (150) configured to communicate with the main controller (140); and a chair control board (155) configured to control a chair of a grandstand by communicating with the sub-controller.

A low envelope chair with a back that includes portions with relative high back pitches at the lower ends and other higher portions with relatively low back pitches to give the overall feeling of a high back pitch chair while retaining the low envelope. By low envelope, generally less than approximately 17 inches, preferably approximately 16 inches or less or even more preferably approximately 15 inches or less are contemplated with respect to chairs that have a tilt up seat. A high back pitch would generally be more than 15 degrees, preferably more than 20 degrees, preferably more than 25 degrees and even more preferably more than 30 degrees.

A low envelope chair with a back that includes portions with relative high back pitches at the lower ends and other higher portions with relatively low back pitches to give the overall feeling of a high back pitch chair while retaining the low envelope. By low envelope, generally less than approximately 17 inches, preferably approximately 16 inches or less or even more preferably approximately 15 inches or less are contemplated with respect to chairs that have a tilt up seat. A high back pitch would generally be more than 15 degrees, preferably more than 20 degrees, preferably more than 25 degrees and even more preferably more than 30 degrees.

A retractable seat assembly which can be attached to a vertical structure and which, in the upright position, presents a profile which is relatively thin and in any event poses virtually no impediment to going very close to the vertical structure. The retractable seat assembly having a rear support, a seat, a front support, and a biaser which releasably biases said seat to the generally upright position.