Bat with barrel pivot joint

1. A ball bat configured for impacting a ball, the ball bat extending along a longitudinal axis, the bat comprising:

a unitary bat frame including a handle portion and a barrel portion having a distal region; and

a pivot joint coupled to the distal region of the barrel portion, the pivot joint movably supporting the barrel portion relative to the longitudinal axis such that the distal region of the barrel portion may pivot towards and away from the longitudinal axis about the pivot joint.

2. The ball bat of claim 1 , wherein the pivot joint includes an end cap, wherein the pivot joint comprises one of an annular socket coupled to one of the distal region of the barrel portion and the end cap, and a rounded bulbous head coupled to the other of the barrel portion and the end cap while being received within the annular socket.

3. The ball bat of claim 1 , wherein the pivot joint includes an end cap, wherein the distal region of the barrel portion includes an annular groove that forms an annular socket, wherein the end cap has a rounded peripheral surface that engages the annular groove, and wherein the annular groove of the distal region of the barrel portion is configured to pivot with respect to the rounded peripheral surface upon impact with the ball.

4. The ball bat of claim 3 , wherein the pivot joint is the only pivot joint incorporated within the bat.

5. The ball bat of claim 1 , wherein the pivot joint further includes an end cap having a rounded peripheral surface and an annular socket member coupled to the distal region of the barrel portion, wherein the annular socket member includes an annular groove for engaging the rounded peripheral surface of the end cap.

6. The ball bat of claim 5 , wherein the distal region of the barrel portion has a generally constant wall thickness.

7. The ball bat of claim 5 , wherein the pivot joint is the only pivot joint within the bat.

8. The ball bat of claim 1 , wherein the pivot joint further includes an end cap, and a tube attached to and extending from the end cap into the barrel portion of the bat.

9. The ball bat of claim 8 , wherein the tube extends at least 4 inches into the barrel portion of the tube.

10. The ball bat of claim 8 , wherein a weight is positioned within the tube.

11. The ball bat of claim 10 , wherein the weight includes a recess for engaging a projection from the tube.

12. The ball bat of claim 8 , wherein an annular support member is positioned within the barrel portion of the bat and is configured to engage the tube extending within the barrel portion.

13. The ball bat of claim 12 , wherein the annular support member engages the tube at its projecting end and engages the inner surface of the barrel portion.

14. The ball bat of claim 12 , wherein the tube includes a tube end that closes the projecting end of the tube, and wherein the tube end extends beyond the diameter of the tube to form a rim at the end of the tube for facilitating engagement with the annular support member.

15. The ball bat of claim 8 , wherein the pivot joint is the only pivot joint within the bat.