Patents by Inventor Takayasu Ishizuka

Takayasu Ishizuka 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: 5331302
    Abstract: A miniature transfer relay has a base mounting a contact assembly and an electromagnet. The contact assembly includes a normally-open (NO) fixed contact, a normally-closed (NC) fixed contact, a common conductor, and a movable spring extending from the common conductor and carrying first and second movable contacts engageable respectively with the NO and NC contacts. The electromagnet block includes an armature which is movable between set and reset positions and is connected to the movable spring for making and breaking the NO and NC contacts simultaneously in response to the armature movement. The NO fixed contact and the common conductor are molded in an upper surface of the base, while the NC fixed contacts has a portion molded in the base.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: July 19, 1994
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Takashi Yoshimura, Takayasu Ishizuka, Masayui Shiomi, Tomoyoshi Hayashi, Hiroaki Aihoshi, Hisanobu Tanaka