Introduction to the mechanics
When we began work on the FreedMan Chair, we wanted to completely challenge the convention of the way people sit and have been sitting for the last 7,000 years or so. No-one has ever tried to replicate the human standing posture when sat on a chair before, so here’s what makes our chair so unique...
The seat pan of the FreedMan Chair articulates on a specially made stainless steel ball, which allows a controlled, rising and lowering of each side of the seat. This allows the seat to match any pelvic height imbalance that the sitter has when standing and hence maintains their side-to-side spinal curves.
Contoured Seat Pads
The chair's two contoured seat pads have been created to cup and hold our sitting bones (ischial tuberosties) and in doing so it allows the thighs to achieve a 27 degree forward slope, which maintains the forward to backward spinal curves. The average distance between these is 12.34cms/5inches with a variation of 15% (9mm on each side). The chair fits all sizes.
This really is a back rest and not a 'lumbar support'. When in the correct position the sitter's back is not in contact with the back rest, as the spine supports the sitter as in standing. When resting the sitter leans back into the back and the six 'back balls' gently push into the muscles either side of the spine and in the same manner as the osteopathic technique of inhibition, the balls initiate a gradual relaxation of these muscles.
The chair has five legs with castors for hard floors incorporated into its feet. Instead of a gas lift, the height adjustment is performed by rotation of the aluminium helix. This avoids the weakest part of conventional office chairs.
The FreedMan Chair is a true case of form following function. The chair has been engineered to perform the very specific functions that are required to replicate the spines standing posture whilst seated. The design of the chair incorporates several features. The legs and feet are inspired by the great British furniture designer Thomas Chippendale and are a reworking of his famous cabriole leg and ball and claw foot.
The back rest is influenced by the great chair designers Paul Volther (Corona), Hans Wegner (Chair 33) and Kofod-Larsen (G-plan).