Patents by Inventor Daisuke Itou

Daisuke Itou 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).

  • Vacuum pump
    Patent number: 5352097
    Abstract: A vacuum pump includes a positive displacement vacuum pump structure section disposed on a discharge opening side; a kinetic vacuum pump structure section, disposed on a suction opening side, for providing a high vacuum; and a kinetic vacuum pump structure section, disposed on a suction opening side, for providing a high pumping speed. The construction of the kinetic vacuum pump structure section is different from that of the kinetic vacuum pump structure section so as to differ relative thereto in one of ultimate pressure, pumping speed, and pumping speed of sucked gas with respect to a molecular weight of the sucked gas.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: October 4, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Daisuke Itou, Teruo Maruyama