Patents by Inventor Kunihisa Fujii

Kunihisa Fujii 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).

  • Electromagnetic relay having precise positional relationship between elements
    Patent number: 4703295
    Abstract: An electromagnetic relay constructed by assembling an electromagnet portion including an armature of a straight bar shape arranged adjacent to a magnetic pole piece; a fixed contact spring; and a spring holding portion including a movable contact spring driven by a card driven by the armature, so that the precise portional relationship between elements of the electromagnetic relay is realized.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: October 27, 1987
    Assignee: Takamisawa Electric Co., Ltd.
    Inventors: Kunihisa Fujii, Noboru Tomono, Tetsuo Kito, Kosei Yoshino
  • Electromagnetic relay
    Patent number: 4516099
    Abstract: In an electromagnetic relay, one of the spring members of the electromagnetic relay is fixed to a cubic corner protrusion of a base block of a housing. Side projections provided in the spring member are fitted into deep holes which adjoin a slot in the cubic corner protrusion so that the spring member becomes firmly fixed to the base block.
    Type: Grant
    Filed: April 15, 1982
    Date of Patent: May 7, 1985
    Assignee: Takamisawa Electric Co., Ltd.
    Inventors: Kunihisa Fujii, Noboru Tomono, Hajime Watanabe, Yasushi Miyakoshi
  • Electromagnetic relay
    Patent number: 4472699
    Abstract: In an electromagnetic relay, an electromagnet is constructed from an approximately U-shaped magnetic pole piece, an approximately U-shaped magnetic yoke, and an armature. One side leg of the magnetic pole piece, one side leg of the magnetic yoke, and the armature are accomodated in the central hole of a bobbin so that the efficiency of the conversion of electrical power into a driving force is increased.
    Type: Grant
    Filed: July 8, 1982
    Date of Patent: September 18, 1984
    Assignee: Takamisawa Electric Co., Ltd.
    Inventors: Kunihisa Fujii, Noboru Tomono, Hajime Watanabe, Tetsuo Kito
  • Armature holding structure and hinge wire spring used therein
    Patent number: 4439750
    Abstract: An armature holding structure using a hinge wire spring in an electromagnetic relay, wherein one end of the hinge wire spring is held in a hole in the yoke of the electromagnet and the other end of the hinge wire spring is held in the hole in the armature so that the pivot support structure of the armature at the end of the yoke is maintained by the hinge wire spring.
    Type: Grant
    Filed: April 20, 1982
    Date of Patent: March 27, 1984
    Assignee: Takamisawa Electric Co., Ltd.
    Inventors: Kunihisa Fujii, Noboru Tomono, Yukio Shikano