Patents by Inventor Yuji Tsujita

Yuji Tsujita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Impeller of centrifugal blower
    Patent number: 4647271
    Abstract: 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.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: March 3, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Makoto Nagai, Isamu Horiuchi, Masamichi Hanada, Sigeaki Kuroda, Masakatsu Hayashi, Yasuro Ohishi, Yutaka Mori, Eiji Maeda, Kimito Kasukabe, Yuji Tsujita, Hironori Etou, Katsuaki Kikuchi, Masato Itagaki