Patents by Inventor Akira Iwahashi

Akira Iwahashi 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).

  • Continuous kiln
    Patent number: 5248255
    Abstract: The present invention enables a tile or other ceramic wares to have a deep reduced color. A roller hurse kiln 210 includes rollers 214, and a burner mounted in a firing zone adjacent to the outlet so as to provide a reducing gas. The burner has gas injection holes. The injection holes may be circular holes having a diameter of 1 to 5 mm or may be in the form of a slit having a width of 1 to 5 mm. The burner is located 15 to 80 mm above a material to be fired.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: September 28, 1993
    Assignee: Inax Corporation
    Inventors: Toshimichi Morioka, Yaushisa Hirano, Akira Iwahashi, Masataka Matsuo, Kazuyoshi Kurayoshi, Akio Ishii
  • Sintered ceramic body with excellent refractories (heat resistance) and machinability and method of manufacture of the same
    Patent number: 4963517
    Abstract: Disclosed is a sintered ceramic body with high strength, excellent refractoriness (heat-resistance) and machinability characterized by comprising a composition of CaO-SiO.sub.2 -MgO as surrounded by the points 1, 2, 3, 4, 5, 6 and 7 in FIG. 1.Also disclosed is a method of manufacturing a sintered ceramic body with excellent refractoriness (heat-resistance) and machinability characterized by preparing a raw material composition which consists of CaO, SiO.sub.2 and MgO as surrounded by the points, 1, 2, 3, 4, 5, 6 and 7 in FIG. 1 and then firing the composition at a temperature higher than 1200.degree. C. and up to 1350.degree. C.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: October 16, 1990
    Assignee: Inax Corporation
    Inventors: Kazumasa Goto, Hiroto Shin, Hideki Ishida, Yasuo Goto, Akira Iwahashi