An adjustable firmness seat suspension includes a seat frame, first and second spring members, and an intermediate tensioning member. The seat frame includes a first frame member and a second frame member spaced apart from and opposite one another. The first spring member is attached to the first frame member, the second spring member is attached to the second frame member, and the intermediate tensioning member is attached to and extends between the first spring member and the second spring member. The intermediate tensioning member is formed from a shape memory alloy (SMA) having a first length that provides a first spring tension of the seat suspension through the first and second spring members, and configured to alter its length to a second length that provides a second spring tension of the seat suspension through the first and second spring members in response to application of a tensioning signal thereto.

An adjustable firmness seat suspension includes a seat frame, first and second spring members, and an intermediate tensioning member. The seat frame includes a first frame member and a second frame member spaced apart from and opposite one another. The first spring member is attached to the first frame member, the second spring member is attached to the second frame member, and the intermediate tensioning member is attached to and extends between the first spring member and the second spring member. The intermediate tensioning member is formed from a shape memory alloy (SMA) having a first length that provides a first spring tension of the seat suspension through the first and second spring members, and configured to alter its length to a second length that provides a second spring tension of the seat suspension through the first and second spring members in response to application of a tensioning signal thereto.

An adjustable firmness seat suspension includes a seat frame, first and second spring members, and an intermediate tensioning member. The seat frame includes a first frame member and a second frame member spaced apart from and opposite one another. The first spring member is attached to the first frame member, the second spring member is attached to the second frame member, and the intermediate tensioning member is attached to and extends between the first spring member and the second spring member. The intermediate tensioning member is formed from a shape memory alloy (SMA) having a first length that provides a first spring tension of the seat suspension through the first and second spring members, and configured to alter its length to a second length that provides a second spring tension of the seat suspension through the first and second spring members in response to application of a tensioning signal thereto.

An adjustable firmness seat suspension includes a seat frame, first and second spring members, and an intermediate tensioning member. The seat frame includes a first frame member and a second frame member spaced apart from and opposite one another. The first spring member is attached to the first frame member, the second spring member is attached to the second frame member, and the intermediate tensioning member is attached to and extends between the first spring member and the second spring member. The intermediate tensioning member is formed from a shape memory alloy (SMA) having a first length that provides a first spring tension of the seat suspension through the first and second spring members, and configured to alter its length to a second length that provides a second spring tension of the seat suspension through the first and second spring members in response to application of a tensioning signal thereto.

A space-saving suspension apparatus comprising a coarse suspension device, a mechanical assembly, and a fine suspension device coupling a supported frame to a base frame at a neutral height such that forces and/or displacements of either the base frame or the supported frame result in oppositely directed forces and/or displacements of the other of the base frame and the supported frame. In some embodiments, the neutral height is adjustable.

A space-saving suspension apparatus comprising a coarse suspension device, a mechanical assembly, and a fine suspension device coupling a supported frame to a base frame at a neutral height such that forces and/or displacements of either the base frame or the supported frame result in oppositely directed forces and/or displacements of the other of the base frame and the supported frame. In some embodiments, the neutral height is adjustable.

A vehicle seat mounting system includes a seat mount plate and a vehicle mount plate. A vertically operable scissor linkage assembly is disposed between the seat mount plate and the vehicle mount plate and is oriented such that respective opposing ends of a first scissor arm and a second scissor arm are each secured to a respective one of the seat mount plate and the vehicle mount plate. A spring assembly is disposed between the seat mount plate and the vehicle mount plate and is oriented to cooperate with the scissor linkage assembly to resist translation between the vehicle mount plate and the seat mount plate. An adjuster assembly cooperates with the spring assembly and is operable to manipulate the proportion of the spring assembly that is available to be engaged to resist motion of the mounting system.

A space-saving suspension apparatus comprising a coarse suspension device, a mechanical assembly, and a fine suspension device coupling a supported frame to a base frame at a neutral height such that forces and/or displacements of either the base frame or the supported frame result in oppositely directed forces and/or displacements of the other of the base frame and the supported frame. In some embodiments, the neutral height is adjustable.

A space-saving suspension apparatus comprising a coarse suspension device, a mechanical assembly, and a fine suspension device coupling a supported frame to a base frame at a neutral height such that forces and/or displacements of either the base frame or the supported frame result in oppositely directed forces and/or displacements of the other of the base frame and the supported frame. In some embodiments, the neutral height is adjustable.

A kinetic seat cushion assembly that rotates based on a force applied on an occupant seated therein is provided. The kinetic seat cushion assembly includes a primary seat cushion frame, a secondary seat cushion frame, a seat cushion tilt mechanism coupling the secondary seat cushion frame to the primary seat cushion frame such that the secondary seat cushion frame is movable with respect to the primary seat cushion frame, and a front pivot mechanism that pivotally couples a front portion of the primary seat cushion frame to a front portion of the secondary seat cushion frame.