Patents by Inventor Shoji Nanba

Shoji Nanba 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).

  • Automobile floor structure
    Patent number: 6793276
    Abstract: A floor is partitioned into a plurality of areas S1 to S4 by a floor tunnel portion 11, side frames 13, side sills 12, and cross members 7, 8, 15, and 16, and the rigidity of the floor panels of the areas S1 to S3 is adjusted by rigidity adjustment portions 20, 21, 22, 23, and 25. These floor panels are set such that their natural frequency in a 2×1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: September 21, 2004
    Assignee: Mazda Motor Corporation
    Inventors: Tsuyoshi Sugihara, Takanobu Kamura, Minoru Sunada, Yoshio Fujii, Shoji Nanba, Toshiharu Ikeda, Gunji Yoshii, Tsutomu Naganuma
  • Automobile floor structure
    Publication number: 20030034673
    Abstract: A floor is partitioned into a plurality of areas S1 to S4 by a floor tunnel portion 11, side frames 13, side sills 12, and cross members 7, 8, 15, and 16, and the rigidity of the floor panels of the areas S1 to S3 is adjusted by rigidity adjustment portions 20, 21, 22, 23, and 25. These floor panels are set such that their natural frequency in a 2×1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.
    Type: Application
    Filed: July 29, 2002
    Publication date: February 20, 2003
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Tsuyoshi Sugihara, Takanobu Kamura, Minoru Sunada, Yoshio Fujii, Shoji Nanba, Toshiharu Ikeda, Gunji Yoshii, Tsutomu Naganuma