Hitachi, Ltd.

Eiji Maeda

Katsuaki Kikuchi

Aizo Kaneda

Shozo Nakamura

Kazutaka Suefuji

Takao Senshu

Masakatsu Hayashi

Tetsuya Arata

Masato Itagaki

Sigeaki Kuroda

Masamichi Hanada

Makoto Nagai

Yasuro Ohishi

Hironori Etou

Yutaka Mori

Kimito Kasukabe

Yuji Tsujita

Yasuyuki Kanai

Kimiaki Nakakado

Sadatsohi Minakawa

Shunichi Aoki

Isamu Horiuchi

A compressor has stationary and orbiting scroll members formed thereon with spiral wraps engaged with each other to define compression chambers which, when the orbiting scroll member is moved relative to the stationary scroll member, are radially inwardly moved while decreasing their volumes. Each scroll member is composed of a metallic base scroll member having a spiral wrap formed on one side and a coating layer of a resin compound formed on the said side of the scroll member, including the surfaces of the wrap. The coating layer is molded by placing the base scroll member in a mold cavity with a space left between the said side of the base scroll member and a mold part and by injecting the resin compound into the space.

Fluid machine with resin-coated scroll members

An impeller of a centrifugal blower includes a hub, a hub plate, a plurality of blades and a shroud. The hub plate has an outer diameter which is smaller than an inner diameter of the shroud and a portion of the blades existing in the difference between the diameters is provided with a parting plane of molds, whereby the impeller can be integrally molded by the injection molding.

Impeller of centrifugal blower

A shake-out machine for use with a self-curing mold which includes a body having a bridge-shaped frame and hydraulic cylinder device provided with downwardly directed plungers disposed on top of a ceiling portion of said frame. A mold feeding means arrangement is provided with a wheeled panel serving as a supporting mount for a molding flask during the shake-out operation. The wheeled panel is provided with an opening and is adapted to be run along rails laid on a floor so as to transport the mold under the plungers. A dropped material delivery device, including a wheeled panel capable of running on rails laid on a bottom portion of a pit, is provided with a delivery box mounted on the wheeled panel. The hydraulic cylinder device is equipped with plungers which are operable independently of each other, whereby desired plungers in said hydraulic cylinder device may be lowered by an amount commensurate with the size of a molding flask.

Shake-out machine for use with self-curing mold

Growing community of inventors

Shimizu, Japan

Eiji Maeda