Abstract: A body support structure including a backrest, a seat connected to the backrest, and a suspension material connected to the backrest or the seat. The suspension material includes elastomeric filaments with monofilaments and multifilaments. The suspension material further includes a first zone with a first stiffness, a second zone with a second stiffness greater than the first stiffness, and a transition zone positioned between the first zone and the second zone.

Abstract: 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.

Abstract: A chair includes a lower chair and an upper chair. The lower chair includes a tilt-swivel mechanism defining a vertical swivel axis, a yoke, and a column extending between the tilt-swivel mechanism and the yoke. The upper chair is pivotably mounted to the yoke about a horizontal upper chair pivot axis. The upper chair includes a seat adapted to cradle the ischial tuberosities of a user.

Abstract: 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.

Abstract: A chair includes a lower chair and an upper chair. The lower chair includes a tilt-swivel mechanism defining a vertical swivel axis, a yoke, and a column extending between the tilt-swivel mechanism and the yoke. The upper chair is pivotably mounted to the yoke about a horizontal upper chair pivot axis. The upper chair includes a seat adapted to cradle the ischial tuberosities of a user.

Abstract: A body support structure including a backrest, a seat connected to the backrest, and a suspension material connected to the backrest or the seat. The suspension material includes elastomeric filaments with monofilaments and multifilaments. The suspension material further includes a first zone with a first stiffness, a second zone with a second stiffness greater than the first stiffness, and a transition zone positioned between the first zone and the second zone.

Abstract: A body support structure includes a backrest and a seat connected to the backrest. A suspension material is connected to the backrest or the seat. The suspension material has a first zone with a first stiffness and a second zone with a second stiffness greater than the first stiffness. Also included are methods of creating different zones in the suspension material.

Abstract: A back support for a chair includes a cover configured to be coupled to opposing sides of a chair frame. A strap is connected to the cover. A sled having a central portion is coupled to the strap, the sled is configured to pivot with respect to the chair frame and provide support to a user's back. The cover is configured to moveably connect to the chair frame between a low position and a high position. The sled is configured to pivot as the cover moves between the low position and the high position so that the central portion of the sled is substantially parallel to at least a portion of a membrane connected to the frame between the low position and the high position.

Abstract: A back support for a chair includes a cover configured to be coupled to opposing sides of a chair frame. A strap is connected to the cover. A sled having a central portion is coupled to the strap, the sled is configured to pivot with respect to the chair frame and provide support to a user's back. The cover is configured to moveably connect to the chair frame between a low position and a high position. The sled is configured to pivot as the cover moves between the low position and the high position so that the central portion of the sled is substantially parallel to at least a portion of a membrane connected to the frame between the low position and the high position.

Abstract: A body support structure includes a backrest and a seat connected to the backrest. A suspension material is connected to the backrest or the seat. The suspension material has a first zone with a first stiffness and a second zone with a second stiffness greater than the first stiffness. Also included are methods of creating different zones in the suspension material.

Abstract: A screen assembly includes a core having an edge and first and second opposite side surfaces. A retainer, or edge treatment, is coupled to the edge of the core and extends outwardly from the core. The retainer includes first and second resilient limbs having respective edge portions defining a mouth. First and second cover portions overlie the core and exterior surfaces of the retainer. The first and second cover portions wrap around the first and second limbs and are disposed through the mouth such that the edges of the first and second cover portions are retained by the limbs. Various screen supports and accessory interface members also are provided.

Abstract: A screen assembly includes a core having an edge and first and second opposite side surfaces. A retainer, or edge treatment, is coupled to the edge of the core and extends outwardly from the core. The retainer includes first and second resilient limbs having respective edge portions defining a mouth. First and second cover portions overly the core and exterior surfaces of the retainer. The first and second cover portions wrap around the first and second limbs and are disposed through the mouth such that the edges of the first and second cover portions are retained by the limbs. Various screen supports and accessory interface members also are provided.

Abstract: A screen assembly includes a core having an edge and first and second opposite side surfaces. A retainer, or edge treatment, is coupled to the edge of the core and extends outwardly from the core. The retainer includes first and second resilient limbs having respective edge portions defining a mouth. First and second cover portions overly the core and exterior surfaces of the retainer. The first and second cover portions wrap around the first and second limbs and are disposed through the mouth such that the edges of the first and second cover portions are retained by the limbs. Various screen supports and accessory interface members also are provided.