Patents by Inventor Takamasa Hattori

Takamasa Hattori 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 having a checking means for checking that fluid has been filled inside of a sprinkler head body and method for checking that the fluid has been filled using such sprinkler head
    Patent number: 5373989
    Abstract: A sprinkler head includes a checking mechanism for checking from the outside that fluid such as fire protection water has been filled inside of a sprinkler head body. A method for checking that the fluid such as fire protection water has been filled includes providing a movable rod inside of the sprinkler head body in such a manner as to be axially moved inwardly and outwardly when the fluid has been filled inside of the sprinkler head body, and checking that the fluid has been filled inside of the sprinkler head body by observing a position of the movable rod from the outside.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: December 20, 1994
    Inventor: Takamasa Hattori
  • Pipe coupling arrangement
    Patent number: 5351999
    Abstract: A pipe coupling arrangement is directed to a coupling body fitted on at least one of a pair of pipes to connect the pipes with one another. The coupling arrangement includes a protruded portion formed on the outer periphery of each of the pipes, an annular sleeve having an inner wall therein being engageable with the protruded portion, the sleeve being provided in a space between the outer periphery of the pipe and the inner periphery of the coupling body, a threaded hole inwardly and slantingly formed in the coupling body closer to one end thereof for arresting the slipping off of the sleeve from the coupling body, a cut-away face formed on the outer periphery of the sleeve, the cut-away face having a tilt angle perpendicular to that of the threaded hole, and a fastening member screwed into the threaded hole such that the tip portion of the fastening member can abut against the cut-away face.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: October 4, 1994
    Inventor: Takamasa Hattori
  • Method of installing pipes for sprinkler head mounting, and sprinkler-head mounting piping arrangement
    Patent number: 5327976
    Abstract: A method of installing sprinkler-head mounting pipes for supply of water to sprinkler heads employed for a fire water release system and a piping arrangement for sprinkler-head mounting wherein the joints each have at least two outlet ports and sprinkler heads are coupled to the outlet ports via flexible pipes.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: July 12, 1994
    Inventor: Takamasa Hattori
  • Sprinkler head
    Patent number: 5159984
    Abstract: A sprinkler head comprises an elastic retainer which is mounted between a couple of clamps and can absorb and reduce a tightening power which is added to a heat sensitive part by the insertion of a screw. Water can be sprayed according to circumstances due to an improvement in the sensitivity of the heat sensitive part.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: November 3, 1992
    Inventor: Takamasa Hattori
  • Butterfly valve
    Patent number: D410070
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: May 18, 1999
    Inventor: Takamasa Hattori