Hitachi, Ltd.

Agency of Industrial Science and Technology

Saburo Kazama

Takashi Ikeguchi

Shunsuke Nogita

Masayoshi Kubota

Isao Satoh

Hideo Abe

Akira Tamura

Kiyoshi Muramori

A rotary head apparatus includes magnetic heads on its outer peripheral portion and rotatably supported in a hollow space defined by fixed hollow upper and lower cylindrical drums, a brushless motor stator coil attached to one or the other of the fixed drums, and a brushless motor magnet and yoke, or a first and a second magnets, arranged on the rotary head apparatus on both sides of the stator coil with a gap therebetween.

Rotary head apparatus with motor magnet and yoke surrounding motor

An apparatus for separating non-magnetic materials of different densities, which apparatus includes a material separating portion, in which a magnetic fluid is retained in a magnetic field having a gradient in a vertical direction. In this apparatus, a single conveyor is jointly used for the supply, and charging of materials to be separated, into the material separating portion, and the transporting of floating materials of a low density through the magnetic fluid and their recovery outside.

Apparatus for separating non-magnetic materials of different densities

Growing community of inventors

Hiratsuka, Japan

Saburo Kazama