Hitachi, Ltd.

Yoshihisa Awada

Masahiro Mase

Takashi Nagaoka

Hisanao Ogata

Nobuo Tsumaki

Shinjiroo Ueda

Kimio Muramatsu

Yoshinori Hakuraku

Seiji Sakagami

Akira Nishiuchi

Seiichi Kikkawa

Takeshi Okawada

Ichiro Gyobu

Keiji Ueyama

Hiroki Kajiwara

Since a peripheral-flow pump according to the present invention has a peripheral-flow impeller having a cylindrical staircase shape whose outer diameter increases in one direction only like a staircase, a stator, which conventionally has been of a complicated configuration composed of two pieces, can be formed into an integral molding without any deterioration in pump performance. Accordingly, the production of pumps is facilitated.

Turbo vacuum pump

A vacuum pump with a heating portion for preventing adhesion of reaction products on a discharge side thereof.

Vacuum pump

A cryogenic liquefied pump system which includes a pump having a drive motor, bearings, a drive shaft, and an impeller adapted to be disposed in a vessel storing a cryogenic liquid. An outer insulating tank is mounted in the vessel and an inner insulating tank is mounted inside the outer insulating tank, with a vacuum layer being interposed between the inner and outer insulating tanks. An inner side of the inner insulated tank, in which the motor and bearings are arranged, is maintained at a room temperature, with a tip portion of the inner insulating tank being formed into an outer case extending into a cryogenic region outside of the outer insulated tank.

Cryogenic liquefied pump system

Growing community of inventors

Shimoinayoshi, Japan

Yoshihisa Awada