Hitachi, Ltd.

Hiromoto Ashihara

Masayuki Fujio

Kazuo Kobayashi

Takashi Watanabe

Susumu Yamazaki

Hiroshi Asabuki

Kengo Hasegawa

Eiichi Ito

Hajime Fujita

Yukio Chihara

Kazuo Yanagiya

Tomoya Tamura

Kanzi Mizutani

Yuichi Nakatsuhama

Yukio Makuta

Tsutomu Takahashi

Mitsuo Nakamura

Fumiaki Ishida

Sotozi Hiramoto

Tomoya Tomita

Motoaki Fujino

Takeshi Moritake

Takesi Okubo

Kuniyuki Matsuo

Kenji Hosaka

A vortex flow blower used as an air source to be incorporated into general industrial machines. The vortex flow blower is characterized in that the shape of the blade in its impeller is three dimensionally formed such that at least the inner portion of the blade can be adapted to the three dimensional internal flow. According to the present invention, the aerodynamic performance can be significantly improved and the size of a vortex flow blower can be reduced. Furthermore, an impeller having three dimensionally shaped blades is manufactured by independently manufacturing the shroud and the blades and coupling them, so that the impeller of a complicated shape can be readily manufactured. Furthermore, since the blade can be made of a thin and light material, the secondary moment of inertia of the impeller can be reduced.

Method of manufacturing an impeller

A blower muffling apparatus includes a blower chamber for housing a blower therein, an exhaust chamber positioned adjacent the blower body side of a blower disposed in the blower chamber, communicating in one of upper and lower portions with the blower chamber, and having an exhaust port in the other portion, a muffling passage chamber disposed adjacent the blower chamber in the axial direction of the blower, and having one end communicating with the other portion of the exhaust chamber and the other end communicating with a discharge port of the blower through a flexible exhaust duct, and a duct accommodating chamber for accommodating the flexible exhaust duct therein, each of the chambers being surrounded by a sound-absorbing material. Exhaust gas of the blower is discharged from the flexible exhaust duct through the muffling passage chamber and the exhaust chamber to thereby absorb exhaust noise of the blower.

Blower muffling apparatus

Vortex flow blower having blades each formed by curved surface

Vortex flow blower having blades each formed by curved surface and

An apparatus for inserting a plurality of kinds of electronic parts into a predetermined position of a printed board. An electronic part which is successively supplied from an electronic part supplying means is fed to a predetermined supply positioning end by a feeding means. An insertion unit carries the electronic part from this position to a predetermined specific position, thereby inserting the electronic part into the printed board. The printed board is held and positioned by an X-Y table. At a position corresponding to said specific position, the apparatus has a clinching means for clinching the leads of the electronic part which is inserted into the printed board and a control means which controls a predetermined operation of each means.

Apparatus for automatically inserting electronic part

Growing community of inventors

Funabashi, Japan

Hiromoto Ashihara