Patents by Inventor Shizuo UESHIGE

Shizuo UESHIGE 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).

  • Twin-screw extruder, gear box and method for extrusion
    Patent number: 11618199
    Abstract: A twin-screw extruder is provided in which screws have different rotational speeds depending on the process of treating the raw material and in which degradation of the raw material is less likely to occur. Twin-screw extruder 1 has two screws 3, 5 that extend in parallel to each other. Each screw 3, 5 has cylindrical upstream screw 31 and downstream screw 35, wherein upstream screw 31 has shaft hole 315 that extends in longitudinal direction X and screw flight 316 on an outer circumferential surface thereof, and downstream screw 35 includes large diameter portion 353 having screw flight 357 on an outer circumferential surface thereof and small diameter shaft portion 351 that has a smaller diameter than large diameter portion 353, wherein small diameter shaft portion 351 of downstream screw 35 is inserted into shaft hole 315 of upstream screw 31. Upstream screw 31 and downstream screw 35 can be independently rotated.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: April 4, 2023
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Kazutoshi Izumiya, Katsumi Sumida, Yoshitaka Kimura, Masashi Tanimoto, Hiroyuki Okuma, Katsuyuki Kaneko, Shizuo Ueshige, Nobuaki Tanaka, Takahiro Nakamaru
  • TWIN-SCREW EXTRUDER, GEAR BOX AND METHOD FOR EXTRUSION
    Publication number: 20200398474
    Abstract: A twin-screw extruder is provided in which screws have different rotational speeds depending on the process of treating the raw material and in which degradation of the raw material is less likely to occur. Twin-screw extruder 1 has two screws 3, 5 that extend in parallel to each other. Each screw 3, 5 has cylindrical upstream screw 31 and downstream screw 35, wherein upstream screw 31 has shaft hole 315 that extends in longitudinal direction X and screw flight 316 on an outer circumferential surface thereof, and downstream screw 35 includes large diameter portion 353 having screw flight 357 on an outer circumferential surface thereof and small diameter shaft portion 351 that has a smaller diameter than large diameter portion 353, wherein small diameter shaft portion 351 of downstream screw 35 is inserted into shaft hole 315 of upstream screw 31. Upstream screw 31 and downstream screw 35 can be independently rotated.
    Type: Application
    Filed: February 13, 2019
    Publication date: December 24, 2020
    Applicants: The Japan Steel Works, Ltd., Tokyo Printing Ink Mfg. Co., Ltd.
    Inventors: Kazutoshi IZUMIYA, Katsumi SUMIDA, Yoshitaka KIMURA, Masashi TANIMOTO, Hiroyuki OKUMA, Katsuyuki KANEKO, Shizuo UESHIGE, Nobuaki TANAKA, Takahiro NAKAMARU