Haworth, Inc.

Joel Dral

Larry Allen Wilkerson

Richard N Roslund, Jr

Patrick C Nelson

John Clark

Troy Roark

Steve Simpson

Robert T Ritt

A tilt control mechanism for an office chair includes a spring arrangement which permits forward and rearward tilting of the chair while also urging the chair to a normal upright position. The spring arrangement includes front and rear springs which act in combination such that the upward acting forces acting on the chair can be varied during use. The forces being applied by the front spring are adjusted by a side-actuated tension adjustment mechanism which incorporates a wedge block for adjusting the spring forces. Further, the rear springs provide a variable spring force such that the spring force is maximized when in the normal position but is decreased substantially once the chair is fully reclined. This reduction in spring force allows a user to maintain the chair in the fully reclined position with significantly less force than was required to tilt the chair rearwardly while a sufficient spring force continues to be applied by the front spring to urge the chair to the normal position.

Tilt control for chair

An office-type chair which includes a seat assembly and back assembly that are pivotally supported on a chair base or pedestal to support a user thereon. To increase the comfort of the user, the seat assembly is tiltable forwardly and rearwardly by way of a tilt control mechanism while the back assembly thereof is tiltable laterally from side to side, i.e. in the leftward and rightward directions by way of a back torsion mechanism.

Chairback with side torsional movement

An office-type chair includes a seat assembly and back assembly which are pivotally supported on a chair base to support a user thereon. The chair also includes height-adjustable chair arm assemblies which are located on opposite sides of the seat assembly and include a height-adjustment mechanism which is readily adaptable to a variety of shapes and sizes for the chair arm assemblies. The height-adjustment mechanism is connected to an actuator mechanism which has a plurality of levers connected in series to disengage the locking mechanism.

Height adjustable chair arm

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Lula, GA, United States of America

Joel Dral