Patents by Inventor Hitoshi Koyano

Hitoshi Koyano 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).

  • Proportioning valve
    Patent number: 5462341
    Abstract: A proportioning valve including an annular piston (3) slidably fitted into a cylinder bore (2), a valve seat (6) disposed on the piston (3), and a second spring (5) installed in an output pressure chamber (10) so that the piston is positioned at a predetermined position.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: October 31, 1995
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Hitoshi Koyano, Shozo Sakaguchi
  • System for printing images having a half tone
    Patent number: 4071849
    Abstract: Printed images having a half tone are realized in a printing system using a temperature sensitive paper. A thermal-head which is positioned close to the temperature sensitive paper is heated by an input electrical signal and the heated thermal-head changes the darkness of the temperature sensitive paper. The period of time that the thermal-head is heated is controlled by the input electrical signal and, thus, the temperature of the thermal-head is a function of the input electrical signal. The darkness or the concentration of images on the temperature sensitive paper can be changed according to the input electrical signal. Thus an image having a half tone is obtained on a temperature sensitive paper.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: January 31, 1978
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Hitoshi Koyano, Nobuo Sugaya, Michio Shiraogawa