A chair assembly includes a base assembly, a seat assembly having a pair of side edges and a fore-to-aft extending longitudinal centerline, a back assembly movable between upright and reclined positions, and an arm assembly including an arm base extending from a first location between the side edges to a second location laterally outward of one of the side edges, wherein the arm base extends at an acute angle with respect to the longitudinal centerline and at an upward angle from the first location toward the second location, a support assembly supported by and extending upwardly from the arm base, and an armrest supported by the support assembly that is adjustable to support the armrest between a plurality of selected vertical positions, wherein the arm assembly and back assembly move at a different rate from one another as the back assembly is moved between the upright and reclined positions.

A portable elevating seat for assisting a person into and out of a seating includes a central telescoping unit with a seating member mounted thereon. Preferably, the seat further includes a pneumatic pump and at least one pressure relief valve in fluid communication with the central telescoping unit for providing a flow of air into and out of the central telescoping unit. The seat includes a power source being in electronic communication with the pneumatic pump. The seat further includes a control unit in electronic communication with the pneumatic pump and the power source for actuating the seat between a raised and a lowered position. As the pneumatic pump is actuated by the control unit, air flows into the central telescoping unit, thus extending the central telescoping unit and lifting the seating member to a desired height.

A portable elevating seat for assisting a person into and out of a seating includes a central telescoping unit with a seating member mounted thereon. Preferably, the seat further includes a pneumatic pump and at least one pressure relief valve in fluid communication with the central telescoping unit for providing a flow of air into and out of the central telescoping unit. The seat includes a power source being in electronic communication with the pneumatic pump. The seat further includes a control unit in electronic communication with the pneumatic pump and the power source for actuating the seat between a raised and a lowered position. As the pneumatic pump is actuated by the control unit, air flows into the central telescoping unit, thus extending the central telescoping unit and lifting the seating member to a desired height.

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.

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.

A chair back assembly includes a back shell member including laterally extending top, bottom and side portions cooperating to define an open space therebetween, where a portion of the back shell member is located in a lumbar region, a cover having a first surface and a second surface opposite the first surface, wherein the cover covers at least a portion of the open space, and a back frame assembly operably supporting the back shell member and movable between upright and reclined positions, wherein the back frame assembly causes the back shell to flex in a fore-to-aft direction as the back frame assembly is moved between the upright and reclined positions independent of an external force being exerted on the back shell member, and where the lumbar portion of the back shell member remains spaced from the back frame as the back frame is moved between the upright and reclined positions.

A chair back assembly includes a back shell member including laterally extending top, bottom and side portions cooperating to define an open space therebetween, where a portion of the back shell member is located in a lumbar region, a cover having a first surface and a second surface opposite the first surface, wherein the cover covers at least a portion of the open space, and a back frame assembly operably supporting the back shell member and movable between upright and reclined positions, wherein the back frame assembly causes the back shell to flex in a fore-to-aft direction as the back frame assembly is moved between the upright and reclined positions independent of an external force being exerted on the back shell member, and where the lumbar portion of the back shell member remains spaced from the back frame as the back frame is moved between the upright and reclined positions.

A use state-switchable massage device includes a backrest part and a seat part. In the use state-switchable massage device, the use state can be switched so that a user may perform a massage while sitting (sitting-mode) or lying down (lying-mode). When the use state is switched from the sitting state to the lying state, the massage may be performed in a state in which the user's waist is fully stretched (a state in which the spine is straightened while being curved upward).

A use state-switchable massage device includes a backrest part and a seat part. In the use state-switchable massage device, the use state can be switched so that a user may perform a massage while sitting (sitting-mode) or lying down (lying-mode). When the use state is switched from the sitting state to the lying state, the massage may be performed in a state in which the user's waist is fully stretched (a state in which the spine is straightened while being curved upward).

Surgical robotic systems including a user console for controlling a robotic arm or a surgical robotic tool are described. The user console includes components designed to automatically adapt to anthropometric characteristics of a user. A processor of the surgical robotic system is configured to receive anthropometric inputs corresponding to the anthropometric characteristics and to generate an initial console configuration of the user console based on the inputs using a machine learning model. Actuators automatically adjust a seat, a display, or one or more pedals of the user console to the initial console configuration. The initial console configuration establishes a comfortable relative position between the user and the console components. Other embodiments are described and claimed.