Compliant seating structure

1. A body support structure comprising:

a plurality of spaced apart support members defining a first surface, wherein adjacent support members define openings between sides of the adjacent support members, wherein an entire periphery of each of the support members is surrounded by the openings;

a plurality of spaced apart base portions defining a second surface, wherein the second surface is spaced apart from the first surface and wherein the plurality of support members and the plurality of base portions define a space therebetween, wherein each of the base portions underlies at least portions of the openings defined by at least four adjacent support members and are connected to the four adjacent support members, wherein adjacent base portions define openings between sides of the adjacent base portions, wherein an entire periphery of each of the base portions is surrounded by the openings defined between adjacent base portions, wherein the support members are only connected to the base portions underlying the openings defined between the support members, and wherein the base portions are not otherwise supported by any other structure; and

a plurality of connectors extending across the space and connecting each base portion with the at least four adjacent support members.

2. The body support structure of claim 1 wherein the at least portions of the openings defined by the at least four adjacent support members have a cross shape.

3. The body support structure of claim 1 wherein at least some of the plurality of support members are rectangular.

4. The body support structure of claim 3 wherein at least some of the plurality of base portions are rectangular.

5. The body support structure of claim 1 wherein the plurality of support members have outer surfaces defining the first surface.

6. The body support structure of claim 5 wherein the plurality of base portions have outer surfaces defining the second surface.

7. The body support structure of claim 6 wherein the outer surfaces of the support members and base portions faces away from each other.

8. The body support structure of claim 7 wherein the plurality of support members have inner surfaces and the plurality of base portions have inner surfaces, wherein the inner surfaces of the support members face towards the inner surfaces of the base portions.

9. The body support structure of claim 8 wherein the plurality of connectors extend between the inner surfaces of the support members and the inner surfaces of the base portions.

10. A body support structure comprising:

a plurality of spaced apart support members defining a first surface, wherein adjacent support members define openings between sides of the adjacent support members;

a plurality of spaced apart base portions defining a second surface, wherein the second surface is spaced apart from the first surface and wherein the plurality of support members and the plurality of base portions define a space therebetween, wherein each of the base portions underlies at least portions of the openings defined by at least four adjacent support members, and wherein adjacent base portions define openings between sides of the adjacent base portions; and

a plurality of connectors extending across the space and connecting each base portion with the at least four adjacent support members, wherein at least some of the connectors comprise parallel linear legs.

11. The body support structure of claim 1 wherein at least portions of the first and second surfaces are planar.

12. The body support structure of claim 1 wherein the first and second surfaces are curved.

13. The body support structure of claim 1 wherein portions of the openings between adjacent support members are aligned with portions of the openings between adjacent base portions so as to define a plurality of through openings extending between the first and second surfaces.

14. A seat comprising the body support structure of claim 1 .

15. A backrest comprising the body support structure of claim 1 .

16. A body support structure comprising:

a first plurality of spaced apart rectangular first support members defining a first surface, wherein each of the first support members has four corners, and wherein adjacent first support members define openings between corners and sides of the adjacent first support members, wherein an entire periphery of each of the first support members is surrounded by the openings;

a second plurality of spaced apart rectangular second support members offset from the first plurality of support members, wherein each of the second support members has four corners, wherein adjacent second support members define openings between the corners and sides of the adjacent second support members, wherein an entire periphery of each of the second support members is surrounded by the openings defined between the adjacent second support members, wherein at least some of the second support members underlie at least portions of the openings defined by at least four adjacent first support members, wherein the second support members are not otherwise supported by any other structure, and wherein the first and second pluralities of first and second support member are arranged in a checkerboard pattern, wherein the corners of each of the first support members are aligned with and overlie the corners of four adjacent second support members; and

a plurality of connectors extending between the aligned corners of the first and second pluralities of first and second support members.

17. The body support structure of claim 16 wherein the plurality of first support members have outer surfaces defining the first surface.

18. The body support structure of claim 17 wherein the plurality of second support members have outer surfaces defining the second surface.

19. The body support structure of claim 18 wherein the outer surfaces of the first and second support members face away from each other.

20. The body support structure of claim 19 wherein the plurality of first support members have inner surfaces and the plurality of second support members have inner surfaces, wherein the inner surfaces of the first support members face towards the inner surfaces of the second support members.

21. The body support structure of claim 20 wherein the plurality of connectors extend between the inner surfaces of the first and second support members.

22. A body support structure comprising:

a first plurality of spaced apart rectangular first support members defining a first surface, wherein each of the first support members has four corners, and wherein adjacent first support members define openings between corners of the adjacent first support members;

a second plurality of spaced apart rectangular second support members offset from the first plurality of support members, wherein each of the second support members has four corners, and wherein the first and second pluralities of first and second support member are arranged in a checkboard pattern, wherein the corners of each of the first support members are aligned with and overlie the corners of four adjacent second support members; and

a plurality of connectors extending between the aligned corners of the first and second pluralities of first and second support members, wherein the plurality of connectors extend between the inner surfaces of the first and second support members, and wherein at least some of the connectors comprise parallel linear legs.

23. The body support structure of claim 16 wherein at least portions of the first and second surfaces are planar.

24. The body support structure of claim 16 wherein the first and second surfaces are curved.

25. The body support structure of claim 16 wherein portions of the openings between adjacent first support members are aligned with portions of the openings between adjacent second support members so as to define a plurality of through openings extending between the first and second surfaces.