Patents by Inventor Kohei Washida

Kohei Washida 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).

  • Injection apparatus
    Patent number: 8043549
    Abstract: An object is to reduce the axial dimension of an injection apparatus (31), facilitate the work of removing and inserting a screw (20), and improve the quality of molded products. The injection apparatus (31) comprises a heating cylinder (17), a screw (20), and a drive apparatus. The screw (20) includes a plasticizing portion which includes a body portion (45a) and a flight (53) projectingly formed on an outer circumferential surface of the body portion (45a). An index ?, which is obtained by dividing a value obtained by adding a screw stroke S and a screw effective length L together by the screw stroke S, satisfies the relation 2.0<?<4.5. Even when the screw (20) is shortened, resin can be melted satisfactorily. Accordingly, the axial dimension of the injection apparatus (31) can be reduced.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: October 25, 2011
    Assignees: Sumitomom Heavy Industries, Ltd., Spiral Logic Limited
    Inventors: Hirotsugu Marumoto, Shigeru Takeuchi, Kohei Washida, Daisuke Goto, Munekatsu Kamiya
  • INJECTION APPARATUS
    Publication number: 20100258981
    Abstract: An object is to reduce the axial dimension of an injection apparatus (31), facilitate the work of removing and inserting a screw (20), and improve the quality of molded products. The injection apparatus (31) comprises a heating cylinder (17), a screw (20), and a drive apparatus. The screw (20) includes a plasticizing portion which includes a body portion (45a) and a flight (53) projectingly formed on an outer circumferential surface of the body portion (45a). An index ?, which is obtained by dividing a value obtained by adding a screw stroke S and a screw effective length L together by the screw stroke S, satisfies the relation 2.0<?<4.5. Even when the screw (20) is shortened, resin can be melted satisfactorily. Accordingly, the axial dimension of the injection apparatus (31) can be reduced.
    Type: Application
    Filed: August 8, 2008
    Publication date: October 14, 2010
    Applicants: SUMITOMO HEAVY INDUSTRIES, LTD., SPIRAL LOGIC LIMITED
    Inventors: Hirotsugu Marumoto, Shigeru Takeuchi, Kohei Washida, Daisuke Goto, Munekatsu Kamiya