Patents by Inventor Ryusuke Ota

Ryusuke Ota 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).

  • RUBBER EXTRUDER AND SCREW FOR SAME
    Publication number: 20200147564
    Abstract: To provide a rubber extruder capable of efficiently removing volatile components in unvulcanized rubber without decreasing productivity of the unvulcanized rubber. The rubber extruder 1 is for extruding the unvulcanized rubber (G) while kneading. It includes a barrel 2 having an input port 5 for introducing the unvulcanized rubber (G) and a discharge port 6 for discharging the unvulcanized rubber (G), a screw 3, which is arranged in the barrel 2, for extruding the unvulcanized rubber (G), and a vent 4 for sucking out air in the barrel 2. The screw 3 has a dam portion 7 which locally controls an extrusion amount of the unvulcanized rubber (G), a first screw portion 8 defined between the input port 5 and the dam portion 7, and a second screw portion 9 defined between the dam portion 7 and the discharge port 6. An effective screw length (L1) of the first screw portion 8 is 50% or more of a total effective screw length (L) of the screw 3.
    Type: Application
    Filed: May 16, 2018
    Publication date: May 14, 2020
    Applicants: Sumitomo Rubber Industries, Ltd., Nakata Engineering Co., Ltd.
    Inventors: Tomoo TANAKA, Yoshinobu NAKAMURA, Masayuki SAKAMOTO, Tadasuke SATO, Ryusuke OTA, Hideaki TAKEUCHI, Masaaki MICHIBAYASHI, Makoto NODA
  • Applicator
    Patent number: 6997631
    Abstract: To provide an applicator which is free from ink leakage under any usage-environmental conditions, is suitable for oil-based ink, maintains appropriate ink delivery and is produced at low cost.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: February 14, 2006
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Norio Yamada, Ryusuke Ota
  • Applicator
    Publication number: 20050169691
    Abstract: To provide an applicator which is free from ink leakage under any usage-environmental conditions, is suitable for oil-based ink, maintains appropriate ink delivery and is produced at low cost.
    Type: Application
    Filed: May 29, 2003
    Publication date: August 4, 2005
    Inventors: Norio Yamada, Ryusuke Ota