Ulvac, Inc.

Shinko Electric Company, Ltd.

Secom Co., Ltd.

Takashi Nakamura

Tomonari Tanaka

Mitsuru Yahagi

Susumu Mitsushima

Kouji Shibayama

Yuuji Fukaura

Susumu Yasaki

Yoshinori Ishiai

A method is provided which manufactures a vane used for an oil-sealed rotary vacuum pump and having at least a part formed of a resin material, the method including: an oil impregnating process of immersing the vane into oil used for the oil-sealed rotary vacuum pump under a depressurized condition, the oil impregnating process being carried out before a finishing process of finishing the vane into a final shape.

Method of manufacturing vane

An automatic fire extinguishing apparatus including a fire sensor, a swivel chamber and an expansible hollow rod secured to the chamber. When a fire is detected by the fire sensor, the swivel chamber is rotated about a vertical axis in accordance with the output of the fire sensor until the rod is directed to the fire source. Then a pressurized fire extinguishing agent contained in a bomb is introduced into the rod through the chamber to expand the rod toward the fire source. The expansion of the rod is stopped when the end of the rod is adjacent the fire source and the free end of the rod is opened, so that the fire extinguishing agent is discharged toward the fire source.

Apparatus for automatically extinguishing fire

Growing community of inventors

Chigasaki, Japan

Takashi Nakamura