Bridgestone Tire Company Limited

Bridgestone Corporation

Shinji Morimura

Hiroshi Sasaki

Takashi Maekawa

A fish breeding apparatus is disclosed, which comprises a frame body for the fish breeding framed by connecting rod elastic reinforcements to each other into a polygon at a side number of 4 to 30 through bent couplings, and a mooring cable connected at its one end to each of the bent couplings.

Fish breeding apparatus

A floating frame member for use in a fish breeding apparatus, which is a hollow rod-shaped elastic body constituting a main part of a gas chamber therein, said elastic body being composed of rubber or rubbery elastic material and reinforced with fiber cords to have an outer diameter of about 279.4-about 609.6 mm (11-24 inches), a thickness of about 12.7-50.8 mm (1/2-2 inches) and a product between a Young's modulus and a sectional secondary moment of 100-3,000 kg.multidot.m.sup.2, and having a ratio of circumferential stress to axial stress of 1.5-2.5 when an internal pressure of 0.1-20 kg/cm.sup.2 is applied to said elastic body.

Floating frame member for use in a fish breeding apparatus

An apparatus for floating and sinking fish breeding netted tanks comprising a floating and sinking mechanism composed of a flexible bag enclosed in a tubular frame and adapted to be supplied with a fluid under pressure and to remove it so as to float and sink the fish breeding netted tank.

Growing community of inventors

Kanagawa, Japan

Shinji Morimura