Patents by Inventor Reiji Hiraga

Reiji Hiraga 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).

  • Fluid drop detecting reservoir tank
    Patent number: 5304852
    Abstract: A fluid drop detecting reservoir tank has a float with a magnet which moves down in accordance with a drop in the level of fluid in a reservoir tank. The magnet closes a magnetically operated switch when the fluid reaches a predetermined level so that a predetermined drop in the level of the fluid is detected. The fluid drop detecting reservoir tank is provided with a mount casing for receiving therein a switch casing in which the switch is encased. The reservoir tank is provided with a retainer mechanism arranged between the mount casing and the switch casing for holding the switch casing in the mount casing so as to locate the switch below the magnet and preventing the switch casing from being withdrawn from the mount casing.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: April 19, 1994
    Assignee: Tokico Ltd.
    Inventors: Reiji Hiraga, Yoshihiro Nakamura