Patents by Inventor Ryouichi Kamon

Ryouichi Kamon 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: 9617952
    Abstract: To provide a price-competitive compression ring having excellent thermal conductivity and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SUP10 in JIS G 4801, which contains small amounts of alloying elements, is used, and a piston ring wire is annealed before an oil-tempering treatment such that spheroidal cementite having an average particle size of 0.1-1.5 ?m is dispersed in a tempered martensite matrix, thereby suppressing the movement of dislocation and creep even at 300° C., and improving thermal sag resistance.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: April 11, 2017
    Assignees: KABUSHIKI KAISHA RIKEN, TOKUSEN KOGYO CO., LTD.
    Inventors: Yuji Shima, Junya Takahashi, Ryouichi Kamon
  • Patent number: 9599223
    Abstract: To provide a price-competitive compression ring having excellent thermal conductivity and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SKS93 in JIS G 4404 is used, and a piston ring wire is annealed before an oil-tempering treatment such that spheroidal cementite having an average particle size of 0.1-1.5 ?m is dispersed in a tempered martensite matrix.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: March 21, 2017
    Assignee: KABUSHIKI KAISHA RIKEN
    Inventors: Yuji Shima, Ryouichi Kamon
  • Publication number: 20150247225
    Abstract: [Object] To provide a wire 1 for piston rings which is less likely to cause a width of an end gap 4 of a piston ring to be varied, is excellent in processability during coiling, and is obtained at low cost. [Solution] The wire 1 for piston rings is made of steel which contains 0.50% by weight or greater but 0.80% by weight or less of C, 1.00% by weight or less of Si, 1.00% by weight or less of Mn, 11.0% by weight or greater but 14.0% by weight or less of Cr, 0.20% by weight or greater but 2.0% by weight or less of Mo, and an unavoidable impurity. An area ratio of carbide particles having a circle-equivalent diameter of 0.2 ?m or greater but 5 ?m or less in a structure in a transverse section of the wire 1 is equal to or less than 10%. A Vickers hardness of the wire 1 is equal to or greater than 350 but equal to or less than 450. The wire 1 is obtained through quenching and tempering. A temperature of the tempering is equal to or higher than 645° C.
    Type: Application
    Filed: October 3, 2012
    Publication date: September 3, 2015
    Inventors: Ryouichi Kamon, Yukitaka Mizuno