Patents by Inventor Toyohisa Toyama

Toyohisa Toyama 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).

  • Additive for rubber, and rubber composition obtained by blending same
    Patent number: 9879130
    Abstract: The present invention pertains to: an additive for rubber, comprising (A) a hydrocarbon-based oil and (B) a styrene/diene block copolymer; and a rubber composition obtained by blending the additive for rubber into rubber. The present invention makes it possible to provide an additive for rubber which has little impact on the environment or the human body and enables the provision of rubber having excellent heat resistance and spring properties, as well as a rubber composition obtained by blending the same.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: January 30, 2018
    Assignee: DOW CORNING TORAY CO. LTD.
    Inventors: Teruyoshi Tanaka, Toyohisa Toyama
  • Vibration-damping rubber composition, and liquid-filled vibration-damping rubber device
    Patent number: 9228627
    Abstract: A vibration-damping rubber composition is provided, which is used as a material for a rubber member of a liquid-filled vibration-damping rubber device in which a glycol liquid is sealingly contained. The rubber composition comprises: (A) a chloroprene rubber as a major component; and (B) an aromatic hydrocarbon plasticizer. The rubber composition makes it possible to suppress increase in the hardness of the rubber member (chamber wall) after thermal aging and reduction in durability.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: January 5, 2016
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Hiroaki Naiki, Toyohisa Toyama, Norihito Kimura
  • Additive For Rubber, And Rubber Composition Obtained By Blending Same
    Publication number: 20150183969
    Abstract: The present invention pertains to: an additive for rubber, comprising (A) a hydrocarbon-based oil and (B) a styrene/diene block copolymer; and a rubber composition obtained by blending the additive for rubber into rubber. The present invention makes it possible to provide an additive for rubber which has little impact on the environment or the human body and enables the provision of rubber having excellent heat resistance and spring properties, as well as a rubber composition obtained by blending the same.
    Type: Application
    Filed: April 30, 2013
    Publication date: July 2, 2015
    Inventors: Teruyoshi Tanaka, Toyohisa Toyama
  • VIBRATION-DAMPING RUBBER COMPOSITION, AND LIQUID-FILLED VIBRATION-DAMPING RUBBER DEVICE
    Publication number: 20140191453
    Abstract: A vibration-damping rubber composition is provided, which is used as a material for a rubber member of a liquid-filled vibration-damping rubber device in which a glycol liquid is sealingly contained. The rubber composition comprises: (A) a chloroprene rubber as a major component; and (B) an aromatic hydrocarbon plasticizer. The rubber composition makes it possible to suppress increase in the hardness of the rubber member (chamber wall) after thermal aging and reduction in durability.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroaki Naiki, Toyohisa Toyama, Norihito Kimura