Patents by Inventor Hirotoshi Niwa

Hirotoshi Niwa 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).

  • Rupturable member
    Patent number: 7607688
    Abstract: A rupturable member in which the rupturing manner thereof can be controlled, and a gas generator using the rupturable member are provided. A fragile portion that ruptures preferentially and regulates the rupturing direction of the rupturable member is formed, the rupturable member being provided with a stress dispersion portion formed in a shape or structure to disperse stress when the rupturable member is ruptured, in the tip end of the fragile portion or forward for the rupturing direction of the fragile portion.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: October 27, 2009
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kazuhiro Kato, Shingo Oda, Hirotoshi Niwa, Yuji Kurihara
  • Rupturable member
    Publication number: 20050206145
    Abstract: A rupturable member in which the rupturing manner thereof can be controlled, and a gas generator using the rupturable member are provided. A fragile portion that ruptures preferentially and regulates the rupturing direction of the rupturable member is formed, the rupturable member being provided with a stress dispersion portion formed in a shape or structure to disperse stress when the rupturable member is ruptured, in the tip end of the fragile portion or forward for the rupturing direction of the fragile portion.
    Type: Application
    Filed: February 24, 2005
    Publication date: September 22, 2005
    Inventors: Kazuhiro Kato, Shingo Oda, Hirotoshi Niwa, Yuji Kurihara
  • Gas generator
    Publication number: 20050189753
    Abstract: The present invention provides a small gas generator which is capable of preventing a cup-like member or fragments thereof from being scattered, even when gas is discharged in the radial direction of the gas generator. The gas generator comprises a cup-like member having a cylindrical form with a bottom, which is integrated with an igniter assembly at a joining portion. The thickness of the joining portion is greater than the thickness of a side wall portion of the cup-like member.
    Type: Application
    Filed: February 10, 2005
    Publication date: September 1, 2005
    Inventors: Kazuhiro Kato, Shingo Oda, Hirotoshi Niwa, Yuji Kurihara, Mikio Yabuta
  • Extraction method
    Patent number: 4658057
    Abstract: In extracting a solute from an aqueous solution using a mixer-settler extractor and an organic extractant comprising a mixture of a tertiary amine and an organic diluent, the extractor is operated while the liquid phase inside the mixer thereof is kept in a state of solvent dispersion. Thus, the mixer-settler extractor can be operated efficiently.
    Type: Grant
    Filed: January 10, 1984
    Date of Patent: April 14, 1987
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kunio Koga, Yukihiro Sasaki, Hirotoshi Niwa