Patents by Inventor Osamu Tosa

Osamu Tosa 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).

  • Publication number: 20150252887
    Abstract: There is provided a metal gasket that is less susceptible to lift and thrust phenomenon of housings and can effectively function as a sealing at a blowhole. The metal gasket includes an embossment portion provided with a pair of outer inclined portions and a pair of inner inclined portions. The metal gasket and satisfies the following relationships: Mh2/Mh1=1.10?1.81, W3>W1, and W3>W2, where Mh1 and Mh2 are vertical lengths, and W1, W2 and W3 are horizontal lengths. When the gasket is sandwiched in between two housings, tip ends abut on the housing to form two seal lines, and root ends, and another tip end abut on the housing H2 to form three seal lines.
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Applicant: Nippon Leakless Industry Co., Ltd.
    Inventors: Osamu Tosa, Shinichi Hirayama, Koichi Nakajima, Masashi Suzuki
  • Patent number: 9121489
    Abstract: There is provided a metal gasket that is less susceptible to lift and thrust phenomenon of housings and can effectively function as a sealing at a blowhole. The metal gasket includes an embossment portion provided with a pair of outer inclined portions and a pair of inner inclined portions. The metal gasket and satisfies the following relationships: Mh2/Mh1=1.10?1.81, W3>W1, and W3>W2, where Mh1 and Mh2 are vertical lengths, and W1, W2 and W3 are horizontal lengths. When the gasket is sandwiched in between two housings, tip ends abut on the housing to form two seal lines, and root ends, and another tip end abut on the housing H2 to form three seal lines.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: September 1, 2015
    Assignee: Nippon Leakless Industry Co., Ltd.
    Inventors: Osamu Tosa, Shinichi Hirayama, Koichi Nakajima, Masashi Suzuki
  • Patent number: 6957814
    Abstract: Disclosed is a metal gasket which is capable of securing a sealing properties by strongly pressing a portion of a bead thereof, which faces a portion where a pressuring surface of one joining surface of one of an intake manifold and an EGR plate does not exist, to the other joining surface thereof. A metal gasket which is clamped between the two joining surfaces and has at least one hole for fluid, includes a bead for sealing the two joining surfaces, the bead surrounding the at least one hole for fluid, each of which allows openings for fluid to be communicated with each other, the openings being provided in the respective joining surfaces. The metal gasket further includes a convex portion, the tip of which abuts one of the joining surfaces, is provided in the vicinity of a portion of the beads abutting the other joining surface.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: October 25, 2005
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Nippon Leakless Industry Co., Ltd.
    Inventors: Yasunori Murakami, Jun Iwamoto, Takeshi Hagiwara, Osamu Tosa, Atsushi Matsufuji
  • Publication number: 20030011140
    Abstract: Disclosed is a metal gasket which is capable of securing a sealing properties by strongly pressing a portion of a bead thereof, which faces a portion where a pressuring surface of one joining surface of one of an intake manifold and an EGR plate does not exist, to the other joining surface thereof. A metal gasket which is clamped between the two joining surfaces and has at least one hole for fluid, includes a bead for sealing the two joining surfaces, the bead surrounding the at least one hole for fluid, each of which allows openings for fluid to be communicated with each other, the openings being provided in the respective joining surfaces. The metal gasket further includes a convex portion, the tip of which abuts one of the joining surfaces, is provided in the vicinity of a portion of the beads abutting the other joining surface.
    Type: Application
    Filed: June 18, 2002
    Publication date: January 16, 2003
    Inventors: Yasunori Murakami, Jun Iwamoto, Takeshi Hagiwara, Osamu Tosa, Atsushi Matsufuji