Abstract: An office chair includes a tilt control mechanism which connects a seat assembly to a base. The tilt control mechanism defines a pivot connection between the seat assembly and the base whereby the seat assembly effectively pivots about a pivot point in any direction extending radially from the pivot point. The tilt control mechanism includes an annular elastomeric ring which resists multi-directional tilting and biases the seat assembly to a neutral position. The elastomeric ring is adjustable axially toward and away from the pivot point to adjust resistance to tilting.

Abstract: An office chair includes a tilt control mechanism which connects a seat assembly to a base. The tilt control mechanism defines a pivot connection between the seat assembly and the base whereby the seat assembly effectively pivots about a pivot point in any direction extending radially from the pivot point. The tilt control mechanism includes an annular elastomeric ring which resists multi-directional tilting and biases the seat assembly to a neutral position. The elastomeric ring has a contact area on which the tilting moment of the seat assembly acts which contact area can be selectively varied to adjust tilting resistance.

Abstract: An operator-interactive adjustable workstation including a support frame, a seat adapted for engagement with an operator, and a worksurface having an enlarged upper surface. A motion connecting structure connects between the frame, seat and worksurface for permitting the positions of the seat and worksurface to be simultaneously adjusted relative to the frame. An operator-interactive structure interconnects to the connecting structure for controlling position-adjusting movement of the seat and worksurface in response to an operator-imposed controlling force. A manually-releasable brake cooperates with the connecting structure for normally maintaining it in a fixed positional relationship to define stationary positions for the seat and worksurface.

Abstract: A chair having a base adapted for support on a floor, a seat-back arrangement for accommodating an occupant, and an upright telescopic height adjustable pedestal assembly connected vertically between the base and the seat-back arrangement for supporting the latter and permitting the height thereof to be vertically adjusted. The height adjustable pedestal assembly include a first height adjusting mechanism having a predetermined vertical stroke defined between upper and lower stroke limiting positions for permitting the height of the seat-back arrangement to be adjusted to any position along said stroke; and a second height adjusting mechanism defining at least upper and lower vertically-spaced range positions for permitting the vertical length of the pedestal assembly to be respectively increased and decreased, whereby the seat-back arrangement can be subjected to the predetermined vertical stroke of the first height adjustment mechanism when in either of the upper and lower range positions.