Patents by Inventor Kazuhisa Iizasa

Kazuhisa Iizasa 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).

  • Glow plug having self-temperature control function
    Patent number: 5132516
    Abstract: A self temperature control type glow plug includes first and second resistor elements and a sheath. The sheath diameter of a first portion of the sheath in which the first resistor element is embedded is set to be smaller than the sheath diameter of a second portion of the sheath in which the second resistor element is embedded, wherein the ratio of the latter diameter of the former diameter ranges from 1.3:1 to 2:1. A tapered portion of the sheath joining the first and second sheath portions encloses a gap larger than at least the sheath diameter of the portion in which the first resistor element is embedded between the first and second resistor elements. The first and second resistor elements are connected to each other within the gap through a connecting means having a substantially zero resistance.
    Type: Grant
    Filed: September 10, 1990
    Date of Patent: July 21, 1992
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Koji Hatanaka, Kazuhisa Iizasa