A chair back height adjustment mechanism comprises a guide having an abutment surface at a lateral side of the guide which extends along an adjustment direction. The chair back height adjustment mechanism comprises an adjusting device supported on the guide so as to be displaceable along the adjustment direction. The adjusting device comprises a carrier, a coupling member which is moveably supported on the carrier, and a bias mechanism. The coupling member has a contact face shaped to abut on the abutment surface of the guide and a slanted face. The bias mechanism is operative to apply a force onto the slanted face to urge the contact face of the coupling member against the abutment surface of the guide.

A chair back height adjustment mechanism comprises a guide having an abutment surface at a lateral side of the guide which extends along an adjustment direction. The chair back height adjustment mechanism comprises an adjusting device supported on the guide so as to be displaceable along the adjustment direction. The adjusting device comprises a carrier, a coupling member which is moveably supported on the carrier, and a bias mechanism. The coupling member has a contact face shaped to abut on the abutment surface of the guide and a slanted face. The bias mechanism is operative to apply a force onto the slanted face to urge the contact face of the coupling member against the abutment surface of the guide.

A seating furniture chassis having a height-adjustable seat surface, a drive means, a shaft, a height-adjustment mechanism and a threaded rod, wherein the drive means is coupled to the shaft and is designed to transmit a torque to the threaded rod by means of the shaft, and wherein the height-adjustment mechanism is coupled to the threaded rod and to the seat surface such that a rotation of the threaded rod is converted into a height adjustment of the seat surface by means of the height-adjustment mechanism, characterized in that a longitudinal axis of the shaft is not arranged parallel to a longitudinal axis of the threaded rod.

A seating furniture chassis having a height-adjustable seat surface, a drive means, a shaft, a height-adjustment mechanism and a threaded rod, wherein the drive means is coupled to the shaft and is designed to transmit a torque to the threaded rod by means of the shaft, and wherein the height-adjustment mechanism is coupled to the threaded rod and to the seat surface such that a rotation of the threaded rod is converted into a height adjustment of the seat surface by means of the height-adjustment mechanism, characterized in that a longitudinal axis of the shaft is not arranged parallel to a longitudinal axis of the threaded rod.

A chair according to the present invention has a reference position P located midway in a front-back direction in a movable range of a seat 2. The chair includes a return force generation mechanism 4 configured to generate a return force in a direction to return the seat 2 moved from the reference position P at least in the front-back direction to the reference position P. The return force generation mechanism 4 includes an elastic member 40 configured to increase the return force in the direction to return the seat to the reference position P as the amount of movement of the seat from the reference position P increases.

The present invention relates to power motion furniture, power motion furniture systems and methods of using the same. In particular, the present invention provides systems and methods for controlling power motion furniture positioning comprising a physical alert (e.g., to indicate furniture component positioning).

A kayak seat is provided that includes a seat base, and a seat pan supported by, and attached to, the seat base. The seat pan is made from a flexible material such that the seat pan is configured to be adjustable. The seat pan is configured to support the pelvis and thighs of a user seated in the seat pan. A seat back is attached to the seat base. A first adjustment mechanism is configured to adjust a position of the seat pan from a single point of adjustment. A second adjustment mechanism is configured to adjust a position of the seat back.

The invention relates to a chair which functions by means of a deflection that is mutually synchronous between a backrest (9) and a seat (25) over a range between a respective zero position of back inclination (R.sub.0) and of seat inclination (S.sub.0) and a respective maximum back inclination (R.sub.max) and maximum seat inclination (S.sub.max). The mechanism (2) that causes synchronous deflection has a spring unit (6) arranged therein. The base support (50) of a carrier unit (5) is rigidly fastened to the underframe (1), which is intended to be set on the floor. A stationary first axis of rotation (D1) and a stationary second axis of rotation (D2) extend through the base support (50). A back carrier (91) is articulated on the first axis of rotation (D1). A third axis of rotation (D3), which moves around the first axis of rotation (D1) when the mechanism (2) is adjusted, extends through the back carrier (91). A base plate (3) lies movably on the base support (50) at the front of the base plate and is articulated on the third axis of rotation (D3) at the rear of the base plate. The base support (50) is designed in the shape of a U, having a center part (54) and two arms (53) extending upward from the center part, which arms each have a shaped piece (55) protruding upward, which shaped pieces each engage in an associated opening (34) in the base plate (3). When the mechanism (2) is deflected, a relative displacement between the stationary shaped pieces (55) and the openings (34) arises. The two openings (34) are oriented in the direction of the seat depth (T) and thus at right angles to the transversely extending axes of rotation (D1, D2, D3).

Dynamic furniture for supporting a seated or reclining user includes a base, an actuator assembly supported by the base, a front boom in circular orbital connection to a portion of the base, a rear boom in circular orbital connection to another portion of the base, a seat platform supported by the actuator assembly, and a back platform supported by the actuator assembly. The seat platform and the back platform are capable of remaining stationary relative to the actuator assembly while the actuator assembly moves relative to the base. The seat platform and the back platform are also capable of moving relative to the actuator assembly while the actuator assembly remains stationary relative to the base. The seat platform and the back platform are also capable of moving relative to the actuator assembly while the actuator assembly moves relative to the base.

Dynamic furniture for supporting a seated or reclining user includes a base, an actuator assembly supported by the base, a front boom in circular orbital connection to a portion of the base, a rear boom in circular orbital connection to another portion of the base, a seat platform supported by the actuator assembly, and a back platform supported by the actuator assembly. The seat platform and the back platform are capable of remaining stationary relative to the actuator assembly while the actuator assembly moves relative to the base. The seat platform and the back platform are also capable of moving relative to the actuator assembly while the actuator assembly remains stationary relative to the base. The seat platform and the back platform are also capable of moving relative to the actuator assembly while the actuator assembly moves relative to the base.