Patents by Inventor Katsutoshi Rikihisa

Katsutoshi Rikihisa 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).

  • PTC panel heater with small rush current characteristic and highly heat insulating region corresponding to heater location to prevent local overheating
    Patent number: 5592647
    Abstract: A panel heater comprising, on an upper surface of a metallic sheet (2) provided with PTC ceramics (1) on the back side thereof, a highly insulating material or an open space (4) at the portion corresponding to the back side portion to which the PTC ceramics are provided, with a material (3) for conducting heat from the metallic sheet being thus provided to the rest of the surface side of said metallic sheet, and a finishing sheet (5) being established on the upper surface of the whole structure. More preferably, the metallic sheet (2) is provided with equally spaced concave grooves with PTC ceramics (1) on the back plane of said grooves and a highly insulating material or an open space (4) inside said grooves, and a finishing sheet (5) established thereon. Accordingly, a simply structured panel heater resistant to heavy loads yet free from local overheating is provided.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: January 7, 1997
    Assignees: Nippon Tungsten Co., Ltd., Kyushu Electric Power Co., Inc.
    Inventors: Masahiro Yamauchi, Takashi Kaimoto, Mitsuhiko Furukawa, Katsutoshi Rikihisa, Hironori Yoshida, Kenji Watanabe