Patents by Inventor Nobukazu Sagawa

Nobukazu Sagawa 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).

  • Patent number: 4525622
    Abstract: The heat generating member in a ceramic glow plug is a coil embedded in the ceramic. The coil is wound to have a coil angle, i.e. an angle formed between the coil and a line parallel to the coil axis, of no more than The ceramic may be a non-oxide ceramic, nitride ceramic, SiC ceramic, or the like.
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: June 25, 1985
    Assignees: Isuzu Motor, Ltd., Kyoto Ceramic Co., Ltd.
    Inventors: Hideo Kawamura, Nobukazu Sagawa, Noriyoshi Yamamoto
  • Patent number: 4401065
    Abstract: In a glow plug, a pair of ceramic rods having longitudinal bonding surfaces are used as a heating rod. A resistor including a heater, and a pair of lead portions connected to both ends of the heater and extending to rear ends of the ceramic rods is continuously disposed on one bonding surface of the ceramic rods. One of the lead portions extends through a hollow metal holder, while the other lead portion is connected to an external connecting terminal mounted through an insulating member.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: August 30, 1983
    Assignees: Jidosha Kiki Co., Ltd., Isuzu Motors Ltd., Kyoto Ceramic Co., Ltd.
    Inventors: Sokichi Minegishi, Tozo Takizawa, Hideo Kawamura, Nobukazu Sagawa
  • Patent number: 4357526
    Abstract: This disclosure relates to a ceramic heater excellent in thermal shock resistance, high temperature resisting property, and free from change in resistance value even in the repeated use of the heater at high temperatures. The heater comprises a heat resisting element of high melting-point metal embedded in a ceramic body of nonoxide selected from a group consisting of silicon nitride, sialon, aluminium nitride and silicon carbide.
    Type: Grant
    Filed: September 2, 1981
    Date of Patent: November 2, 1982
    Assignee: Kyoto Ceramic Kabushiki Kaisha
    Inventors: Shigeyoshi Yamamoto, Nobukazu Sagawa, Noriyoshi Nakanishi
  • Patent number: 4035613
    Abstract: The disclosure relates to a ceramic heating device in the form of a cylindrical shape comprising a burnt cylindrical support core of heat-resistant ceramics, a ceramic element disposed around said support core, said element comprising (i) a burnt sheet of heat-resistant ceramics; (ii) a heat-generating resistor pattern, said pattern being hermetically sealed between said sheet; and (iii) a pair of exposed terminals provided onto said sheet and said core, said terminal being connected to said pattern and adapted to be coupled to power leads such that electric power is then applied to said pattern.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: July 12, 1977
    Assignee: Kyoto Ceramic Co., Ltd.
    Inventors: Nobukazu Sagawa, Yasuo Uchikado, Yoshiteru Hamano, Ryoichi Sugimoto, Sakae Mori