BLEACHER CUSHION

1 . A seat cushion for removable attachment to a bleacher, the seat cushion comprising:

a bottom cushioned portion adapted to set on an upwardly facing surface of a bleacher, the bottom cushioned portion having a bottom surface for resting on the bleacher;

an attachment member connected to the bottom surface of the bottom cushioned portion having a receiving portion adapted to removably receive an attachment mechanism above the upwardly facing surface of the bleacher for securing the bottom cushioned portion to a bleacher, the attachment mechanism comprising a first jaw for engaging a front portion of said bleacher, a second jaw for engaging a rear portion of said bleacher, and a tightening member for drawing said first and second jaws together to capture said bleacher between said first and second jaws;

a back portion flexibly connected to said bottom cushioned portion to rotate in a plane generally radial from the bottom cushioned portion when said bottom cushioned portion is secured to a bleacher; and

a flexible constraint element for preventing said back portion from rotating beyond a desired angle with respect to said bottom cushioned portion.

2 . The seat cushion according to claim 1 , wherein said back portion is free from any rigid cross members.

3 . The seat cushion according to claim 1 , wherein said flexible constraint element comprises a belt of adjustable length spanning between said bottom cushioned portion and said back portion.

4 . The seat cushion according to claim 1 , wherein said flexible constraint element comprises a pair of belts; each of said belts being adjustable in length; each of said belts further spanning from said bottom cushioned portion to said back portion.

5 . The seat cushion according to claim 1 , wherein:

said bottom cushioned portion comprises a seat pad enclosed by a seat covering;

said back portion comprises a backrest pad enclosed by a backrest covering; and

said backrest covering and said seat covering are formed from a single piece of covering material, such that said single piece of covering material flexibly connects said back portion to said bottom cushioned portion.

6 . (canceled)

7 . The seat cushion according to claim 1 , wherein said attachment member is a loop and wherein said attachment mechanism is slideable through said loop in a mating engagement.

8 . The seat cushion according to claim 1 , further comprising a second constraint element between said attachment mechanism and said back portion to maintain said back portion in a generally upright orientation.

9 . The seat cushion according to claim 8 wherein said second constraint element comprises a zip tie.

10 . A bleacher cushion assembly, the bleacher cushion assembly comprising:

an attachment bracket for selective attachment to a bleacher;

a bottom cushioned portion having a bottom surface for resting on a surface of the bleacher,

an attachment member connected to the bottom surface and removably connecting said attachment bracket to provide a cushioned seating location on said bleacher;

a backrest portion flexibly connected to said bottom cushioned portion to rotate in a generally radial plane from the bottom cushioned portion to an upright seating position, said backrest portion having sufficient integral vertical support to maintain itself in a vertical orientation without collapse, and said backrest portion being free from rigid cross members; and

a flexible constraint element to prevent said backrest portion from rotating rearwardly beyond said upright seating position.

11 . The bleacher cushion assembly of claim 10 , wherein said backrest portion comprises:

a pair of laterally spaced apart risers;

a central cushioned portion between said risers; and

a backrest cover covering and binding together said risers and said central cushioned portion, said backrest cover further acting as a flexible connection between said backrest portion and said bottom cushioned portion.

12 . The bleacher cushion assembly of claim 10 , wherein said flexible constraint element comprises a belt of adjustable length having a first end operably connected to said bottom cushioned portion and a second end operably connected to said backrest portion.

13 . The bleacher cushion assembly of claim 10 , wherein said attachment bracket comprises:

a front jaw, said front jaw including a front hook portion for engaging a front portion of said bleacher, a long horizontal leg extending from said hook portion to a location near a rear portion of said bleacher when said front jaw is in engagement with the front portion of said bleacher, and a generally upwardly extending rear leg;

a rear jaw for engaging a rear portion of the bleacher, said rear jaw including a generally upwardly extending leg in close proximity to said generally upwardly extending rear leg of said front jaw; and

a tightening member for drawing said generally upwardly extending legs together to secure said jaws to said bleacher.

14 . The bleacher cushion assembly of claim 10 , wherein:

said bottom cushioned portion comprises a seat pad enclosed by a seat covering;

said backrest portion comprises a backrest pad enclosed by a backrest covering; and

said backrest covering and said seat covering are formed from a single piece of covering material, such that said single piece of covering material flexibly connects said back portion to said bottom cushioned portion.

15 . The bleacher cushion assembly of claim 10 , wherein said attachment bracket comprises:

a first jaw for engaging a front portion of said bleacher;

a second jaw for engaging a rear portion of said bleacher; and

a tightening member for drawing said first and second jaws together to capture said bleacher between said first and second jaws.