Boat expanding and contracting apparatus

1. An assembly, comprising:

a first rigid barrier;

a second rigid barrier;

a first safety barrier and a second safety barrier, each including:

a first barrier portion pivotally connected by a first outside hinge to the first rigid barrier;

a second barrier portion pivotally connected by a second outside hinge to the second rigid barrier; and

a middle hinge that pivotally connects an end of the first barrier portion opposite the first outside hinge to an end of the second barrier portion opposite the second outside hinge about a pivoting axis,

wherein the first rigid barrier, the second rigid barrier, the first safety barrier and the second safety barrier are arranged on a floor and form a closed loop, and

wherein the pivoting axis is substantially perpendicular to the floor.

2. The assembly of claim 1 , further comprising:

an expanding mechanism connected to the first and second rigid barriers to increase a distance between the first and second rigid barriers; and

a contracting mechanism connected to the first and second rigid barriers to decrease the distance between the first and second rigid barriers, wherein the first barrier portion, the second barrier portion, and the middle hinge occupy the distance between the first and second rigid barriers.

3. The assembly of claim 1 , further comprising:

a latching device to removably attach the first barrier portion to the first rigid barrier.

4. The assembly of claim 3 , wherein the latching device includes a pin about which the first outside hinge pivots.

5. The assembly of claim 1 , wherein an axis of the first outside hinge and an axis of the second outside hinge are coplanar in a first plane and in a fully expanded position, an axis of the middle hinge is spaced apart from the first plane at least a predetermined distance on one side of the first plane.

6. The assembly of claim 1 , wherein the first outside hinge has a first axis, the middle hinge has a middle axis substantially parallel to the first axis, and the second outside hinge has a second axis substantially parallel to the middle axis and the first axis.

7. An expandable and contractible safety barrier, comprising:

a first barrier portion including a first outside hinge portion; and

a second barrier portion including a second outside hinge portion,

the first barrier portion being pivotally connected about a pivoting axis to the second barrier portion by a middle hinge on an end of the first barrier portion opposite the first outside hinge portion,

the second outside hinge portion being on an end of the second barrier portion opposite the middle hinge,

wherein the safety barrier is mounted upright with respect to a floor, and

wherein the pivoting axis is substantially perpendicular to the floor.

8. The expandable and contractible safety barrier of claim 7 , further comprising:

a latching device to removably attach the first barrier portion to a fixed barrier.

9. The expandable and contractible safety barrier of claim 8 , wherein the latching device includes the first outside hinge portion.

10. The expandable and contractible safety barrier of claim 8 , wherein the latching device includes a pin about which the first outside hinge portion pivots.

11. The expandable and contractible safety barrier of claim 7 , wherein an axis of the first outside hinge portion and an axis of the second outside hinge portion are coplanar in a first plane and in a fully expanded position, an axis of the middle hinge is spaced apart from the first plane at least a predetermined distance on one side of the first plane.

12. The expandable and contractible safety barrier of claim 7 , wherein the first outside hinge portion has a first axis, the middle hinge has a middle axis substantially parallel to the first axis, and the second outside hinge portion has a second axis substantially parallel to the middle axis and the first axis.

13. An expandable and contractible boat, comprising:

a floor including:

a first floor portion; and

a second floor portion movable relative to the first floor portion between a contracted position in which the first and second floor portions are spaced apart a first distance and an expanded position in which the first and second floor portions are spaced apart a second distance greater than the first distance;

a first fixed barrier fixedly attached to the first floor portion;

a second fixed barrier fixedly attached to the second floor portion; and

an expandable and contractible safety barrier including:

a first barrier portion pivotally connected to the first fixed barrier by a first outside hinge,

a second barrier portion pivotally connected to the second fixed barrier by a second outside hinge, and

a middle hinge that pivotally connects an end of the first barrier portion opposite the first outside hinge to an end of the second barrier portion opposite the second outside hinge about a pivoting axis,

wherein the safety barrier is mounted upright with respect to the floor and the pivoting axis is substantially perpendicular to the floor.

14. The expandable and contractible boat of claim 13 , further comprising:

a latching device that removably attaches the first barrier portion to the first fixed barrier.

15. The expandable and contractible boat of claim 14 , wherein the latching device includes at least one portion of the first outside hinge.

16. The expandable and contractible boat of claim 13 , wherein the expandable and contractible safety barrier is disposed on a stern portion of the boat.

17. The expandable and contractible boat of claim 14 , wherein the expandable and contractible safety barrier is disposed on a bow portion of the boat.

18. The assembly of claim 1 , wherein the first and second safety barriers are mounted upright with respect to the floor.