Patents by Inventor Kumakichi Araya

Kumakichi Araya 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).

  • Seal device in a roller chain
    Patent number: 4094515
    Abstract: A seal device in a roller chain characterized in that an annular body rich in rubber-like elasticity of substantially X-letter or Y-letter section formed with square lips in an outer peripheral edge portion of a base portion thereof is interposed between a roller link plate and a pin link plate, said lips being pressed against the pin in inner and outer directions.
    Type: Grant
    Filed: February 8, 1977
    Date of Patent: June 13, 1978
    Inventors: Kumakichi Araya, Junichi Motoya
  • Method of manufacturing stepped bushings for chains
    Patent number: 3969889
    Abstract: A method of manufacturing stepped bushings for chains characterized in that opposite ends of a cylindrical bushing blank body are formed into reduced diameter portions by application of roll pressure and form rolling.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: July 20, 1976
    Inventor: Kumakichi Araya