OXYGEN DISSOLVING SHIELD

摘要

PROBLEM TO BE SOLVED: To provide an oxygen dissolving shield capable of exhibiting proper buoyancy after input and capable of restraining manufacturing and carrying costs without causing a problem of directionality such as the obverse and reverse when inputted in the water. SOLUTION: A shield 2 composed of an oxygen impermeable material and constituted by arranging a collar 6 on an outer peripheral surface of a cylindrical member 5 having upper/lower surfaces of a blocked-up shape, is formed. A floating ball 3 is housed inside the shield body 2, and water introducing holes 8 communicating the inside and outside of the shield body 2 and being formed so that the inside diametrical dimension becomes smaller than an outside diametrical dimension of the folating ball 3 are arranged in an upper surface 2a and an under surface 2b of the shield 2.