Patents by Inventor Masao Hashi

Masao Hashi 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).

  • Patent number: 5957609
    Abstract: An applicator includes: a barrel body; a holder having a ball house with an ejecting opening at front end for allowing the liquid from the barrel body to flow out; a ball held in the ball house, as being partially exposed to the outside through the ejecting opening; a spherical evading member disposed on the rear side of the ball and having a smaller diameter than that of the ball; a ball seat disposed in the rear part of the ball house, for receiving the rear side of the evading member; a liquid conduit provided in an approximately central part of the ball seat; longitudinal grooves formed on the inside wall of the liquid conduit; and a pressing means disposed through the liquid conduit for urging the evading member forward.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: September 28, 1999
    Assignee: Mitsubishi Pencil Kabushiki Kaisha
    Inventors: Masaaki Morita, Yasuyuki Iwase, Atsunori Satake, Tadashi Koriki, Masao Hashi
  • Patent number: 5690442
    Abstract: This invention provides a metal tip for a ball-point pen, having an ink guide hole (2) formed at the center of the bottom surface of a ball holding portion (1) and radial grooves (3) arranged around the ink guide hole. The ink guide hole has a diameter 30 to 55% the diameter of a ball and a length 1.2 to 2 times the diameter of the ink guide hole. A cleaning tool, used for removing a flash which is formed during formation of the radial grooves (3) by cutting (broaching) and which projects into the ink guide hole (2), is set to have a diameter 70 to 97% the diameter of the ink guide hole, so that only a base portion of the projecting flash is left.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: November 25, 1997
    Assignee: Mitsubishi Pencil Kabushiki Kaisha
    Inventors: Shinsuke Sato, Toshiaki Takayanagi, Toru Kitao, Masao Hashi