Systems and methods for providing ergonomic chairs

1. A chair for supporting a user, said chair comprising:

a seat;

a back support including a chair spine and at least one support surface that is configured to be adjacent to a spine of said user; and

a connector that provides a flexible connection between said seat and said back support, wherein said connector is substantially located at a position higher than an uppermost seating surface of said seat and is configured to be adjacent to a pelvis or a lumbar spine of said user;

wherein said flexible connection is configured to enables said back support to move through a sidebending range of motion from a left side of said user to a right side of said user, while said connector remains substantially fixed during said movement of said user providing a pivot point for said movement;

wherein said flexible connection is further configured to provide a return force for returning said back support to an upright position after said sidebending movement.

2. The chair of claim 1 wherein said flexible connection can be adjusted to restrict said range of motion.

3. The chair of claim 1 wherein said flexible connection can be adjusted to increase said range of motion.

4. The chair of claim 1 wherein a bottom edge of said back support is shaped as an arc of a circle to allow said movement within said sidebending range of motion.

5. The chair of claim 1 wherein said seat comprises:

said uppermost seating surface with an outer layer including at least one vent;

a seat pan that connects to said upper seat surface to create an interior housing; and

at least one channel adjacent to said interior housing at a first end and adjacent to said outer layer at a second end;

wherein said at least one vent aligns with said second end of said at least one channel to enable air to flow between said interior housing and an exterior of said outer layer.

6. The chair of claim 5 wherein said at least one channel includes at least two channels that are adjacent to at least two edges of said upper seat surface.

7. The chair of claim 5 wherein said seat pan includes at least one vent that enables the flow of air between said interior housing and an exterior of said seat pan.

8. The chair of claim 1 wherein said back support further comprises:

a structural back support;

a flexible spine connected to said structural back support;

a thoracic support that is connected to said flexible spine and is adjacent to a portion of said user's thoracic spine, wherein said thoracic support includes a convex surface that contacts said user; and

a lumbosacral support that is connected to said flexible spine and is adjacent to a portion of said user's lumbar spine, wherein said lumbosacral support includes a concave surface that contacts said user.

9. The chair of claim 8 wherein said thoracic support and said lumbosacral support are capable of independently flexing in response to said user.

10. The chair of claim 1 wherein said back support includes sensors to determine a position of the user on said chair.

11. The chair of claim 1 wherein said seat includes sensors to determine a position of the user on said chair.

12. A chair for supporting a user, said chair comprising:

a seat with a seating surface;

a connector that provides a flexible connection between said seat and a back support, wherein said flexible connection is higher than said seating surface and is configured to be adjacent to a pelvis or a lumbar spine of said user; and

said back support comprising:

a structural back support;

a flexible spine connected to said structural back support;

a thoracic support that is connected to said flexible spine through a first support connection and is configured to be adjacent to and surround a portion of said user's thoracic spine; and

a lumbosacral support that is connected to said flexible spine through a second support connection and is configured to be adjacent to and surround a portion of said user's lumbar spine;

wherein said flexible connection enables said back support to move through a sidebending range of motion from a left side of said user to a right side of said user, and wherein said flexible connector remains substantially fixed during said movement of said user;

wherein said flexible connection is further configured to provide a return force for returning said back support to a neutral position after said sidebending movement by said user.

13. The chair of claim 12 wherein said flexible connection provides a pivot point that is adjacent to said seating surface for said back support to move in said sidebending range of motion.

14. The chair of claim 12 wherein said thoracic support includes a convex surface that is configured to contact said user and said lumbosacral support includes a concave surface that is configured to contact said user.

15. The chair of claim 12 wherein said seat includes at least one vent on an outer layer of said seat that aligns with at least one channel within said seat to enable air to flow between an interior housing of said seat and an exterior of said outer layer.

16. The chair of claim 12 wherein said back support and said seat include sensors to determine the position of said user on said chair.

17. A chair for supporting a user, said chair comprising:

a seat;

a back support including a flexible spine and at least one support surface that is configured to be adjacent to a spine of said user; and

a connector that provides a connection between said seat and said back support;

wherein said connection enables said back support to move through a sidebending range of motion, while said connector remains substantially fixed during said movement of said user, and said connection provides a resistance to assist a return of said back support to a neutral position after said sidebending range of motion;

wherein said sidebending range of motion aligns with said back support;

wherein said connector provides a pivot point of said sidebending range of motion that is located substantially above an upper seating surface of said seat and is configured to be adjacent to a pelvis or a lumbar spine of said user.

18. The chair of claim 17 wherein said back support further comprises:

a structural back support that is connected to said flexible spine;

a thoracic support that is connected to said flexible spine and is adjacent to a portion of said user's thoracic spine, wherein said thoracic support includes a convex surface that is configured to contact said user; and

a lumbosacral support that is connected to said flexible spine and is adjacent to a portion of said user's lumbar spine, wherein said lumbosacral support includes a concave surface that is configured to contact said user.

19. The chair of claim 17 wherein said back support further comprises a structural support that supports said flexible spine.