公开(公告)号：US3876204A

公开(公告)日：1975-04-08

申请号：US39468273

申请日：1973-09-06

Applicant: ALUMINUM CO OF AMERICA

Inventor： MOORE NICHOLAS R ,  BLISS ALLEN D

IPC: A63B59/06

CPC classification number: A63B59/50 ,  A63B2102/18

Abstract: A hollow ball bat having a tubular bat body provided with a handle portion, a barrel portion and a connecting portion. A tubular paperboard dampening element secured to the interior surface of the barrel portion and having an external surface in engagement with the barrel portion interior surface. Such engagement may include about 30 to 75 percent of the barrel interior surface. The paperboard tube may be provided with corrugations on its exterior surface and may have a length of about 3.5 to 9 inches. The ball bat has an end closure closing the barrel portion and the dampening member is secured to the end closure. In a preferred form, the end closure is an end plug having a reduced diameter lower portion which extends into the dampening member.