Patents by Inventor Mitsutaka Tanida

Mitsutaka Tanida 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).

  • Electric feed cable for oil well pump
    Patent number: 5410106
    Abstract: The present invention relates to a cable used to supply electric power to a pump for pumping crude oil from an oil well. It is consisted of an insulating layer, a resin sheath and a metallic sheath sequentially layered onto the surface of a conductor. A protective layer comprised by a wrapping of thermal resistant tape is formed at the surface of at least one of the insulating layer and the resin sheath. Due to the provision of this protective layer, it is possible to prevent the breakdown of the insulating layer and the formation of holes in the cable caused by pressure changes occurring when the cable is removed from an oil well within the high pressure environment.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: April 25, 1995
    Assignee: Fujikura Ltd.
    Inventors: Hideharu Nishino, Hideo Sunazuka, Mitsutaka Tanida, Katsuo Haruyama, Touru Oogawara