Patent ID: 6793549
Filing Date: 2004-09-21
Classification: A63B

Abstract:
A buoyancy aid comprising:a) a body having first and second enlarged portions and a connection portion integrally formed therebetween, a space formed inside the body, the body having a prolate shape with a smooth outer surface, wherein the first enlarged portion includes a spherical portion that is a spherical hollow body, and the second enlarged portion includes a stopper portion that is a prolate hollow body formed respectively at two opposing sides of the body, and wherein the space extends from the first and the second enlarged portions by extending through the connection portion; b) at least one hole formed on one side of the body and providing an entrance and exit for fluids into and out of the space; and c) a plug installed in the at least one hole including a cover portion to tightly close the hole and a tube portion integrally formed on the cover portion, wherein at least two protrusions are formed on a distal end of the tube portion away from the cover portion, and the protrusions prevent the plug from being removed from the body.