Patents by Inventor Hatsuyoshi Yoshida

Hatsuyoshi Yoshida 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).

  • Multiple contact switch
    Patent number: 4760221
    Abstract: A multiple contact switch having at least one elastically deformable contact spring that is deformed by means of projections from a plunger to initiate contact with normally-open electrical contacts within the switch. A normally-closed contact piece within the switch also confronts the normally-open contact. Upon deformation of the elastically deformable spring contact, contacts are made and interrupted by means of contacts affixed to the movable contact springs.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: July 26, 1988
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Hatsuyoshi Yoshida, Mitsutoshi Higuchi, Minoru Nishio, Koji Hirai, Shigeo Nakamura, Shinichi Hikita
  • Pressure switch
    Patent number: 4524254
    Abstract: A pressure switch including a diaphragm displaceable under pressure and a switch chamber containing a switch element responsive to the displacement of the diaphragm, the switch chamber further including a vent hole formed therein for communicating said switch chamber with the surrounding atmosphere, the vent hole being closed at one end by a porous filter having air permeability and water repellency, the filter extending outwardly from the surrounding walls of a holder.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: June 18, 1985
    Assignees: Kabushiki Kaisha Tokai Rika Denki Seisakusho, Toyota Jidosha Kabushiki Kaisha
    Inventors: Hatsuyoshi Yoshida, Michio Fukutome, Makoto Ohuchi, Jyun Ohta
  • Electric switch having a sealed casing
    Patent number: 3944774
    Abstract: An electric switch having a sealed casing or a closed type switch wherein a breather hose has its one end opened to the interior of a closed contact chamber, so that the breathing action of the contact chamber due to its temperature change is made through the breather hose. An opening at the other end of the breathing hose is located in an outside atmosphere of good condition, whereby air of high humidity is prevented from intruding into the contact chamber.
    Type: Grant
    Filed: August 7, 1974
    Date of Patent: March 16, 1976
    Assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Tokai Rika Denki Seisakusho K.K.
    Inventors: Motoi Noba, Hatsuyoshi Yoshida