Patents by Inventor Ikuo Nakamura

Ikuo Nakamura 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).

  • Actuator of diaphragm type
    Patent number: 5249508
    Abstract: An actuator (1) of a diaphragm type which comprises an actuator case (2,3), a diaphragm (5) housed in the actuator case, a diaphragm plate (4) attached to the diaphragm for moving together with the diaphragm according to introduction of negative or atmospheric pressure into a negative pressure chamber (7) formed between the diaphragm and the actuator case (2) so as to actuate a device connected to the diaphragm plate. The diaphragm is formed with one or both of an annular rib (5e) having a thick-walled section and an annular expansive portion (5d) having a curved section. Therefore, the diaphragm is hard to be disengaged from the diaphragm plate even if an immoderate force is applied on the diaphragm.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: October 5, 1993
    Assignee: Jidosha Denki Kogyo Kabushiki Kaisha
    Inventors: Jiro Hasegawa, Ikuo Nakamura, Tadashi Hishinuma
  • Seal structures for rotary regenerative heat exchangers of gas turbine engines
    Patent number: 4103908
    Abstract: A hot side seal in rubbing contact with a rotary regenerator matrix of a gas turbine engine consists of an annular portion formed from a carbon block and a diametral portion, the rubbing surface of which is made from a layer of a compound of nickel oxide and calcium fluoride.
    Type: Grant
    Filed: August 12, 1976
    Date of Patent: August 1, 1978
    Assignee: Nissan Motor Company, Limited
    Inventors: Osamu Kobayashi, Ikuo Nakamura, Akira Shimozono