A leaning chair can include a base defining a lower surface that rests on a floor, the base including a support surface; a shaft coupled to the base, the shaft defining a first end and a second end; a flexible mount coupling the first end of the shaft to the base, the shaft extending through the mount; a pivot pin located underneath the mount, the first end of the shaft resting on the pivot pin, and being configured to be housed inside the mount, the pivot pin being configured to pivot on the support surface; and a user support member coupled to the second end of the shaft.

A leaning chair can include a base defining a lower surface that rests on a floor, the base including a support surface; a shaft coupled to the base, the shaft defining a first end and a second end; a flexible mount coupling the first end of the shaft to the base, the shaft extending through the mount; a pivot pin located underneath the mount, the first end of the shaft resting on the pivot pin, and being configured to be housed inside the mount, the pivot pin being configured to pivot on the support surface; and a user support member coupled to the second end of the shaft.

Chairs, seating systems, chair sub-assemblies and sub-systems, and associated methods of assembly and use. Aspects relate to chairs and methods of assembling chairs including chair controls of a relatively compact and effective design with desirable synchronous raising and tilting motions. Aspects also relate to tilt lock assemblies for achieving secure and effective tilt securement. Additional aspects relate to forward and rearward adjustment, or extension and retraction, of a seating assembly of the chair.

Chairs, seating systems, chair sub-assemblies and sub-systems, and associated methods of assembly and use. Aspects relate to chairs and methods of assembling chairs including chair controls of a relatively compact and effective design with desirable synchronous raising and tilting motions. Aspects also relate to tilt lock assemblies for achieving secure and effective tilt securement. Additional aspects relate to forward and rearward adjustment, or extension and retraction, of a seating assembly of the chair.

An elevating wheelchair is disclosed. The wheelchair may have a gas cylinder disposed between the seat of the wheelchair and the frame of the wheelchair. By engaging the gas cylinder and pressing against an assistive push bar, the user may translate the seat along at least a portion of a seat travel path, elevating the seat of the wheelchair.

An elevating wheelchair is disclosed. The wheelchair may have a gas cylinder disposed between the seat of the wheelchair and the frame of the wheelchair. By engaging the gas cylinder and pressing against an assistive push bar, the user may translate the seat along at least a portion of a seat travel path, elevating the seat of the wheelchair.

A chair, primarily for office use, is disclosed with a backrest that supports the user with a flexible mesh material combined with a frame that is shaped to project the mesh forward to support the user without coming into direct contact with the user. The central portion of the backrest frame is recessed relative to the top and bottom portions. The backrest frame is also bowed inward at the bottom with the top edge of the frame projected forward such that the mesh material supporting the user is suspended out and away from the main portion of the backrest frame.

A chair assembly includes a back support arrangement including a back support arrangement, a seat support arrangement and a four-bar arrangement that includes a rearward end and a forward end that is adjustable between a raised and lowered positions, and an arm rest assembly adapted to support the arm of a seated user thereon and supported on the forward end of the four-bar arrangement, wherein the rearward end of the four-bar arrangement is pivotably supported from an arm support structure for pivotable movement about a substantially vertical pivot axis such that the forward end of the four-bar arrangement is moveable between a first position and second position located laterally outward from the first position, and wherein the substantially vertical pivot axis is located forwardly of a rearmost edge of an upwardly-facing surface of the seat support arrangement.

A chair assembly includes a back support arrangement including a back support arrangement, a seat support arrangement and a four-bar arrangement that includes a rearward end and a forward end that is adjustable between a raised and lowered positions, and an arm rest assembly adapted to support the arm of a seated user thereon and supported on the forward end of the four-bar arrangement, wherein the rearward end of the four-bar arrangement is pivotably supported from an arm support structure for pivotable movement about a substantially vertical pivot axis such that the forward end of the four-bar arrangement is moveable between a first position and second position located laterally outward from the first position, and wherein the substantially vertical pivot axis is located forwardly of a rearmost edge of an upwardly-facing surface of the seat support arrangement.

An exercise chair is disclosed that includes a backrest, four legs, and a ball frame, which is configured to nestably receive an inflated ball, such that a top surface of the inflated ball may receive a sitting person. The chair includes a pressure sensor that is positioned beneath a bottom surface of the inflated ball, which is configured to detect pressure exerted by the inflated ball and calculate force measurements resulting from such pressure. The chair also includes an electronic controller/transmitter that is configured to receive the force measurements from the pressure sensor; calculate whether a person sitting on the chair jumped from the chair based on such force measurements during a defined period of time; and communicate a total number of calculated jumps by the person over a defined period of time to the person.