A lower chair for supporting an upper chair on which a user sits. The lower chair including a base, a swivel mechanism supported by the base and defining a vertical swivel axis, and a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis. The four-bar linkage includes a coupler link that moves about a coupler curve. The lower chair also includes a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve. The column defines a column axis and is adapted to support the upper chair.

A stool includes a base with a post extending therefrom. A seat is connected to a distal end of the post. In some configurations, the seat may be configured to act as a deployable back rest. A deployable anti-fatigue mat is connected to the base. In some configurations, the deployable anti-fatigue mat is attached to the base via a hinged connection. In some configurations, the deployable anti-fatigue mat is attached to the base with a sliding connection that allows the deployable anti-fatigue mat to slide out from the base.

An adjustable and angled seat assembly having a base supportable on a ground surface, a wedge support member with a wedge length separating the front and rear ends thereon and a wedge height separating upper and lower ends thereon, with the lower end directly coupled to a support plate and tapering in the wedge height spanning along the wedge length to define a wedge angle θ defined by the upper and lower ends of the wedge support member. The assembly also includes a seat cushion having a seat-support surface disposed above the base and a seat-support angle relative to the base support plane and a lower surface directly coupled to the upper 704 of the wedge support member and a chest cushion having a chest-support surface disposed above the seat-support surface, coupled to the support plate, and disposed at an at an acute angle with respect to the seat-support surface.

An apparatus for mounting an attachment to a seat assembly including a seat mounted on a base includes a substantially planar, substantially rigid mounting plate configured to mount between the seat and the base, a first portion of the mounting plate engaging a plurality of threaded fasteners between the seat and the base, a second portion of the mounting plate extending beyond a perimeter of the seat, and an attachment attached to the second portion of the mounting plate such that the attachment does not interfere with a movement of the seat.

A chair includes, a seat, a backrest separated from the seat, and an upper support frame to which the backrest is attached at a position higher than the seat. In the chair, the upper support frame includes a left side portin and a right side portions both extending forward at left and right sides of the seated person and a rear portion that continuously and integrally connects the left side portion and the right side portion. The left side portion and the right side portion are connected to side support bodies arranged on left and right sides of the seat to be tiltable, and the backrest is connected to the upper support frame to be tiltable rearward.

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.

The present disclosure is directed to a method of collecting and using data obtained from an intelligent automated chair to optimize workflow and increase a user or group's health and productivity. Sensors in the intelligent automated chair can include motion, touch, heart rate, weight, presence, sound, keystroke, etc. In addition, posture, health, and productivity data are collected and compared over periods of time along with a learning algorithm to recommend specific operating models to increase a user or group's overall posture, health, and productivity. The methods and systems are configured to recommend action steps based on usage that can include a chair training program, nutritional training program, mental health training, bonus consideration, rewards program, advancement consideration, etc. Furthermore, the metrics and recommendations can assist with addressing issues associated with absenteeism and presenteeism. Lastly, data collected can be used to create forecasting models based on productivity and health cost.

Adapters may be used for connecting pieces of equipment that may not be directly connected. One adapter for a vehicle seat includes two rails and a metal plate connecting the rails. The rails further include a plurality of holes configured to receive two or more fastening bolts. The fastening bolts are configured to couple a vehicle seat to each of the two rails. The metal plate further includes at least one hole configured to receive a chair base protrusion.

The invention relates to a device (5) for supporting and for movably guiding a chair (6) in a slotted guide (8, 8.1, 8.2), which is provided in a housing (7) and is designed as an elongated hole guide, having a carriage (10) that can be moved in the slotted guide (8, 8.1, 8.2) and supports a chair receptacle (9) of the chair (6). In order to be able to use this device in a more varied manner, according to the invention, the slotted guide (8, 8.1, 8.2) has at least two slotted guide tracks (13, 14), between which an adjustable rack switch (12) is provided in order to transfer the chair (6) out of the one slotted guide track (13) into the other slotted guide track (14), and vice versa.

A plinth attachment system for attachment to at least one track includes: a first plate having a first side configured for mounting to a longitudinally extending track, and a first mounting feature for mounting a first structure; and a second plate having a first side configured for mounting to the track, and a second mounting feature for mounting a second structure. When mounted on the track, at least one interlinking feature of the first side of the first plate and at least one interlinking feature of the first side of the second plate interlock at the track, and, the first mounting feature and second mounting feature are aligned at essentially equivalent longitudinal positions.