Patents by Inventor Kenji Sekigawa

Kenji Sekigawa 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).

  • Method of producing a multicontact spring
    Patent number: 4345372
    Abstract: A multicontact spring having a number of contacts per unit width is produced by press working. A metal tape for a spring is blanked to form a blank. The blank is pressed to make linear dents and, then, cutting of each one of the linear dents is performed. The blank having the cut parts is deformed to form it into a suitable shape for contact points. The thus produced multicontact spring has cut and deformed parts, i.e. contacts, having no free ends. Thereafter, if desired, one end part of the blank is cut to form another type multicontact spring having contacts which have free ends, respectively.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: August 24, 1982
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Kenji Sekigawa, Takeshi Sato, Mikio Motizuki