Chairs

Abstract

A chair includes a first support structure, a second support structure, a seat and a backrest. The backrest is attached to each of the first and second support structures. The seat is attached to each of the first and second support structures.

1 . A chair comprising:
 a first support structure defining a first notch;   a second support structure defining a second notch;   a backrest attached to each of the first support structure and the second support structure; and   a seat attached to each of the first support structure and the second support structure; wherein   the first notch receives a portion of the second support structure adjacent to the second notch;   the second notch receives a portion of the first support structure adjacent to the first notch; and   in use of the chair by a person, the first support structure and the second support structure are together configured to entirely support the seat and the backrest with respect to a ground surface.   
     
     
         2 . The chair of  claim 1  wherein:
 the first support structure comprises a first leg, a second leg, and a first upright member, the first leg comprises a first ground contacting surface, the second leg comprises a second ground contacting surface;   the second support structure comprises a third leg, a fourth leg, and a second upright member, the third leg comprises a third ground contacting surface, the fourth leg comprises a fourth ground contacting surface; and   the first ground contacting surface, the second ground contacting surface, the third ground contacting surface, and the fourth ground contacting surface are coplanar within a ground plane.   
     
     
         3 . The chair of  claim 2  wherein:
 the first support structure extends along a first generally vertical plane, the first generally vertical plane intersects each of the first ground contacting surface and the second ground contacting surface;   the second support structure extends along a second generally vertical plane, the second generally vertical plane intersects each of the third ground contacting surface and the fourth ground contacting surface; and   the first generally vertical plane intersects the second generally vertical plane.   
     
     
         4 . The chair of  claim 3  wherein the first generally vertical plane is perpendicular to the second generally vertical plane. 
     
     
         5 . The chair of  claim 3  wherein:
 the first support structure further comprises a first seat contacting surface;   the second support structure further comprises a second seat contacting surface;   the first seat contacting surface and the second seat contacting surface contact the seat and cooperate to define a support plane; and   the first generally vertical plane and the second generally vertical plane intersect the support plane.   
     
     
         6 . The chair of  claim 5  wherein the support plane is generally parallel with the ground plane. 
     
     
         7 . The chair of  claim 3  wherein:
 the second ground contacting surface is spaced from the first ground contacting surface such that the first ground contacting surface and the second ground contacting surface are spaced from the second generally vertical plane and are disposed upon opposite sides of the second generally vertical plane; and   the third ground contacting surface is spaced from the fourth ground contacting surface such that the third ground contacting surface and the fourth ground contacting surface are spaced from the first generally vertical plane and are disposed upon opposite sides of the first generally vertical plane.   
     
     
         8 . The chair of  claim 7  wherein:
 the first support structure comprises a first arcuate surface extending at least partially between the first ground contacting surface and the second ground contacting surface;   the second support structure comprises a second arcuate surface extending at least partially between the third ground contacting surface and the fourth ground contacting surface; and   substantial portions of each of the first arcuate surface and the second arcuate surface are spaced from the ground plane.   
     
     
         9 . The chair of  claim 2  wherein:
 the first upright member comprises a first backrest contacting surface;   the second upright member comprises a second backrest contacting surface spaced from the first backrest contacting surface; and   each of the first backrest contacting surface and the second backrest contacting surface contacts the backrest.   
     
     
         10 . The chair of  claim 9  wherein the seat is spaced from the backrest. 
     
     
         11 . The chair of  claim 9  wherein:
 the first support structure comprises a first ledge extending from the first upright member, the first ledge having a first ledge surface;   the second support structure comprises a second ledge extending from the second upright member, the second ledge having a second ledge surface;   the first ledge surface is generally perpendicular to the first backrest contacting surface;   the second ledge surface is generally perpendicular to the second backrest contacting surface; and   each of the first ledge surface and the second ledge surface contacts the backrest.   
     
     
         12 . The chair of  claim 1  wherein:
 the first support structure is formed from plastic as a first unitary member;   the second support structure is formed from plastic as a second unitary member;   the backrest is formed from plastic as a third unitary member; and   the seat is formed from plastic as a fourth unitary member.   
     
     
         13 . The chair of  claim 12  consisting essentially of the first unitary member, the second unitary member, the third unitary member, and the fourth unitary member. 
     
     
         14 . The chair of  claim 1  wherein:
 the first support structure comprises a first seat tab and a first backrest tab;   the second support structure comprises a second seat tab and a second backrest tab;   the seat comprises a first seat groove and a second seat groove;   the backrest comprises a first backrest groove and a second backrest groove;   the first seat tab engages the first seat groove;   the second seat tab engages the second seat groove;   the first backrest tab engages the first backrest groove; and   the second backrest tab engages the second backrest groove.   
     
     
         15 . The chair of  claim 1  wherein each of the first support structure and the second support structure is formed from plastic having a first color, each of the seat and the backrest is formed from plastic having a second color, and the first color is different than the second color. 
     
     
         16 . The chair of  claim 1  wherein the backrest defines a handle aperture extending through the backrest. 
     
     
         17 . A chair comprising:
 a first support structure;   a second support structure;   a backrest attached to each of the first support structure and the second support structure by way of snap-fit interlocking features; and   a seat attached to each of the first support structure and the second support structure by way of snap-fit interlocking features; wherein   each of the first support structure, the second support structure, the seat, and the backrest is formed from plastic as a respective unitary member.   
     
     
         18 . A chair consisting essentially of:
 a first support structure formed from plastic as a first unitary member;   a second support structure formed from plastic as a second unitary member;   a backrest formed from plastic as a third unitary member; and   a seat formed from plastic as a fourth unitary member; wherein:   the backrest is attached to each of the first support structure and the second support structure by way of snap-fit interlocking features; and   the seat is attached to each of the first support structure and the second support structure by way of snap-fit interlocking features.   
     
     
         19 . A chair comprising:
 a first support structure, the first support structure comprising a first base, a first upright member extending above the first base, a first leg and a second leg, each of the first leg and the second leg extending below the first base;   a second support structure releasably interlocked with the first support structure, the second support structure comprising a second base, a second upright member extending above the second base, a third leg and a fourth leg, each of the third leg and the fourth leg extending below the second base;   a backrest releasably attached to each of the first upright member and the second upright member; and   a seat releasably attached to each of the first base and the second base.   
     
     
         20 . The chair of  claim 19  wherein:
 the first base defines a first notch;   the second base defines a second notch aligned with the first notch; and   the first notch receives a portion of the second base and the second notch receives a portion of the first base.   
     
     
         21 . The chair of  claim 20  wherein:
 the first support structure further comprises a first seat tab integral with and extending above the first base;   the second support structure further comprises a second seat tab and a third seat tab, each of the second seat tab and the third seat tab being integral with and extending above the second base; and   each of the first seat tab, the second seat tab, and the third seat tab engages a respective one of a plurality of seat grooves in the seat.   
     
     
         22 . The chair of  claim 19  wherein:
 the second support structure extends transversely to the first support structure; and   the first leg, the second leg, the third leg, and the fourth leg are substantially equally spaced from one another.   
     
     
         23 . The chair of  claim 19  wherein:
 the first support structure further comprises a first backrest tab integral with and extending from the first upright member;   the second support structure further comprises a second backrest tab integral with and extending from the second upright member; and   each of the first backrest tab and the second backrest tab engages a respective one of a plurality of backrest grooves in the backrest.   
     
     
         24 . The chair of  claim 19  wherein:
 the first support structure further comprises a first arcuate surface extending at least partially between the first leg and the second leg; and   the second support structure further comprises a second arcuate surface extending at least partially between the third leg and the fourth leg.   
     
     
         25 . The chair of  claim 19  wherein:
 the first support structure is formed from plastic as a first unitary member; and   the second support structure is formed from plastic as a second unitary member.