Patents by Inventor Sigeo Murata

Sigeo Murata 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).

  • Spindle mechanism of drawer
    Patent number: 6295856
    Abstract: A drawing system improves the durability and accuracy of final casting shapes with a mandrel device by utilizing a compact speed-change mechanism. At the tip of a spindle 10, a drawing tool mounting base 15 slidably supports a drawing tool R in a radial direction. At the tip of a cam shaft 24 inserted concentrically with the spindle 10, a cam plate 22 moves the drawing tool R in a radial direction. The spindle 10 and cam shaft 24 are engaged with each other through a speed-change mechanism 30. The speed-change mechanism is in parallel with the spindle 10 and cam shaft 24. The spindle 10 and the cam shaft 24 comprise hollow shafts.
    Type: Grant
    Filed: June 28, 2000
    Date of Patent: October 2, 2001
    Assignees: Sango Co., Ltd., Nihon Spindle Mfg. Co. Ltd.
    Inventors: Masakazu Tobimatsu, Sigeo Murata