Patents by Inventor Yoshika Hirai

Yoshika Hirai 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).

  • Pressure reducing valve
    Patent number: 7258133
    Abstract: A pressure reducing valve comprises a valve support member provided with a water passage, a valve seat fitting on the portion of the valve support member primary side relative to the secondary side end of the water passage, a cup-shaped valve body fitting on the secondary side end of the valve support member to slide and capable of abutting the valve seat at the open end, while enclosing the secondary side end of the water passage at the cylindrical portion, a seal member for sealing the sliding contact part between the valve support member and the valve body, and a resilient member disposed in the valve body to force the valve body away from the valve seat.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: August 21, 2007
    Assignee: ToTo Ltd.
    Inventors: Hideyuki Matsui, Osamu Tokunaga, Yoshika Hirai
  • Pressure reducing valve
    Publication number: 20050126636
    Abstract: A pressure reducing valve comprises a valve support member provided with a water passage, a valve seat fitting on the portion of the valve support member primary side relative to the secondary side end of the water passage, a cup-shaped valve body fitting on the secondary side end of the valve support member to slide and capable of abutting the valve seat at the open end, while enclosing the secondary side end of the water passage at the cylindrical portion, a seal member for sealing the sliding contact part between the valve support member and the valve body, and a resilient member disposed in the valve body to force the valve body away from the valve seat.
    Type: Application
    Filed: March 7, 2003
    Publication date: June 16, 2005
    Inventors: Hideyuki Matsui, Osamu Tokunaga, Yoshika Hirai