Patents by Inventor Fukuji Obara

Fukuji Obara 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).

  • Sprinkler head assembly
    Patent number: 5924492
    Abstract: A sprinkler head includes a nozzle through which water is discharged to extinguish fire. The nozzle is normally held in a closed position. The nozzle is opened in the event of fire. A leaf spring is provided to hold the nozzle in its closed position and permit the nozzle to open. The leaf spring is deformed both in the axial direction of the sprinkler head and in a direction at right angles to the axial direction when an axial force is applied. Furthermore, the leaf spring and is resiliently returned to its original shape when the axial force is released.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: July 20, 1999
    Assignee: Senju Sprinkler Company Limited
    Inventors: Tetsuro Kikuchi, Fukuji Obara, Takatoshi Chiba