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Nottingham sit-stand chairs


Nottingham sit/stand features  |  Seat patents  |  Lumbar spine in seating

Sit/stand seat  |  Slide show by E.N. Corlett, Phd |  Flash slides  |  Key points

Dr. Corlett's designs are with permission. We are not vendors and do not profit from these products.

Nottingham chair enables stable postures while sitting

sit-stand chair patent seats users in a neutral posture, almost at standing position in comfort
Click here for larger image

Some aspects of the Nottingham seat:

  • Postures range from standard upright sitting to sitting up to 70% of the user’s standing height.
  • Relieves loads on the spine by reinstating the natural lumbar curve.

This chair can take sitters near the 135° thigh-torso angle first described by Keegan (1960).

This design bypasses limitations associated with reclined sitting such as greater neck/shoulder loads from increased neck tilt and increased arm loads and reach as users move back from their work as well as increased eye/neck strain from lowering users relative to their visual target (e.g., computer screen)

It avoids unstable sitting postures associated with forward sloping seat pans.

  • It can accommodate almost everyone at a single fixed height desk or counter.
  • It supports working at stations that lack knee clearance (e.g., clean rooms, laboratories)
  • Can accommodate very small / short users (e.g., 12 inch popliteal heights) with standard pneumatic seat cylinder.
  • Enables employees who deal with the public (e.g., reception counters) to sit while the public stands – without the corresponding increase in risk of neck/shoulder injury from sitting while the client stands.
  • It improves reach  (especially useful for grocery checkout clerks, clean rooms, reception counters, postal centers etc.)
  • It is easier to rise and sit on the chair   (useful for users such as pregnant women and the elderly)
  • The biomechanical advantage of sitting with an open angle about 120° greatly facilitates reach and ease of getting up and down.
  • It helps special populations such as pregnant women (easier to rise and sit; easier to breath, reduced loads on the spine);   people with poor circulation or foot swelling (improved circulation);   people with back and knee injuries; short users (brings them up to the desk height);   musicians (improved breathing) and others.

Review of sit-stand seating by Dr. E Nigel Corlett  |  Key points

Research on the Nottingham sit/stand seat: pdf  or   zip

US Patent Office

Patent 5447358  |  Patent 5390979  |  5253922

Databases  |  Search  |  Patents  |  Inventors Resources

Canadian Patent Office

Patent 2004002: Chairs  |  Search  |  Advanced

European Patent Office

Also: European Patent Office

Patent EP0371729: Improvemt chairs  |  Applic  |  Specs

UK Patent GB2226756A: Chair convexly curved seat

Patent db  |  Site  |  Search  |  Search2  |  Databases


Nottingham sit/stand  |  Patents  |  Lumbar spine seating

Sit/stand seating by EN Corlett, Phd |  Flash slides  |  Key points  |  Cites

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