Patents by Inventor Toshizo Kameishi

Toshizo Kameishi 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).

  • Safety device for use in secondary battery
    Patent number: 5766790
    Abstract: A safety device for use in a secondary battery having a battery case formed with a hole open to outside of the battery case, and a generating unit airtightly housed in the battery case. The safety device includes a disk spring mounted on the battery case to close the hole and having one side thereof convexed toward the inside of the battery case. A switch is provided on the backside of the disk spring. It is adapted to change over under a stress applied from the disk spring when the disk spring bends backward so that the other side thereof is convexed toward the outside of the battery case. The switch is provided in a current flow path of the secondary battery.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: June 16, 1998
    Assignee: Wako Electronics Co., Ltd.
    Inventors: Toshizo Kameishi, Tadayuki Izawa, Koji Kihara, Akira Imoto, Toshiharu Hayashi