Patents by Inventor Takayuki Ohji

Takayuki Ohji 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).

  • Method and apparatus for controlling driver mechanism in NC machine tool
    Patent number: 6681146
    Abstract: The present invention relates to a control method and a control apparatus for controlling two (two kinds of) driver mechanisms for relatively moving a main spindle along a single axis in an NC machine tool whereby the straightness of the work-piece machined surface can be finished with high accuracy. The control method of the invention controls operations of two driver mechanisms (124,125,126) for relatively moving a main spindle (104) along a single axis in an NC machine tool (100), and one of the driver mechanisms (124 or 125,126) is driven to relatively move the main spindle (104) in a positive direction along the axis during machining, the other driver mechanism (124 or 125,126) is driven to relatively move the main spindle (104) in a negative direction along the axis during machining.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: January 20, 2004
    Assignee: Mori Seiki Co., Ltd.
    Inventors: Shinji Kawase, Takayuki Ohji, Hiroyuki Ozaki
  • Method and apparatus for controlling driver mechanism in NC machine tool
    Publication number: 20020035410
    Abstract: The present invention relates to a control method and a control apparatus for controlling two (two kinds of) driver mechanisms for relatively moving a main spindle along a single axis in an NC machine tool whereby the straightness of the work-piece machined surface can be finished with high accuracy. The control method of the invention controls operations of two driver mechanisms (124,125,126) for relatively moving a main spindle (104) along a single axis in an NC machine tool (100), and one of the driver mechanisms (124 or 125,126) is driven to relatively move the main spindle (104) in a positive direction along the axis during machining, the other driver mechanism (124 or 125,126) is driven to relatively move the main spindle (104) in a negative direction along the axis during machining.
    Type: Application
    Filed: September 18, 2001
    Publication date: March 21, 2002
    Applicant: Mori Seiki Co., Ltd.
    Inventors: Shinji Kawase, Takayuki Ohji, Hiroyuki Ozaki