Patents by Inventor Osamu Nagai

Osamu Nagai 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).

  • Gasket for layer-built fuel cells and method for making the same
    Publication number: 20020045046
    Abstract: A gasket is provided on a porous sheet in one body. The gasket is thin and has an excellent sealability, and processability when the gasket is built in layer-built fuel cells The gasket is made of liquid rubber and has a hardness not more than 60 (JIS A). Liquid perfluoro rubber and liquid silicone rubber is preferably used for the gasket. And gasket can be made by injection molding.
    Type: Application
    Filed: October 19, 2001
    Publication date: April 18, 2002
    Applicant: NOK Corporation
    Inventors: Yasunori Sasaki, Kazuhisa Senda, Osamu Nagai, Shigeo Wakamatsu, Osamu Ando, Tadashi Fujimoto
  • Gasket for layer-built fuel cells and method for making the same
    Patent number: 6337120
    Abstract: A gasket is provided on a porous sheet in one body. The gasket is thin and has an excellent sealability, and processability when the gasket is built in layer-built fuel cells. The gasket is made of liquid rubber and has a hardness not more than 60 (JIS A). Liquid perfluoro rubber and liquid silicone rubber is preferably used for the gasket. And gasket can be made by injection molding.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: January 8, 2002
    Assignee: NOK Corporation
    Inventors: Yasunori Sasaki, Kazuhisa Senda, Osamu Nagai, Shigeo Wakamatsu, Osamu Ando, Tadashi Fujimoto
  • Hydraulic damper
    Patent number: 5597054
    Abstract: A hydraulic damper has a first oil chamber, a second oil chamber, a communication mechanism defining a communication oil passage, the first and second oil chambers communicating with each other through the communication oil passage, and a damping force adjusting mechanism for varying a cross-sectional area of the communication oil passage to adjust damping forces. The damping force adjusting mechanism includes an adjusting rod having an end disposed in a portion of the communication oil passage, the adjusting rod being movable toward and away from the communication oil passage to vary the cross-sectional area of the communication oil passage, an eccentric cam rotatably disposed in engagement with an opposite end of the adjusting rod, and a rotary actuator for rotating the eccentric cam to move the adjusting rod toward and away from the communication oil passage to adjust the damping forces.
    Type: Grant
    Filed: August 16, 1995
    Date of Patent: January 28, 1997
    Assignee: Showa Corporation
    Inventors: Osamu Nagai, Kunihide Okamoto, Kaoru Yamamoto
  • Hydraulic damper
    Patent number: 5480011
    Abstract: A hydraulic damper has a first oil chamber, a second oil chamber, a communication mechanism defining a communication oil passage, the first and second oil chambers communicating with each other through the communication oil passage, and a damping force adjusting mechanism for varying a cross-sectional area of the communication oil passage to adjust damping forces. The damping force adjusting mechanism includes an adjusting rod having an end disposed in a portion of the communication oil passage, the adjusting rod being movable toward and away from the communication oil passage to vary the cross-sectional area of the communication oil passage, an eccentric cam rotatably disposed in engagement with an opposite end of the adjusting rod, and a rotary actuator for rotating the eccentric cam to move the adjusting rod toward and away from the communication oil passage to adjust the damping forces.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: January 2, 1996
    Assignees: Showa Corp., Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Osamu Nagai, Kunihide Okamoto, Kaoru Yamamoto