Patents by Inventor Tetuji Kawakami

Tetuji Kawakami 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 working a screw rotor, end mill for working , and method of manufacturing a screw compressor
    Patent number: 8166656
    Abstract: A method of improving working of grooves of a screw rotor, in particular, working of grooves side in working efficiency, a working apparatus, a working tool, and a method of manufacturing a screw compressor are provided. A method of controlling rotation of a work and turning of a tool at a time to form a screw tooth space based on a five-axis NC machine, and a special end mill having a cutting edge of a short length and a neck portion provided between the cutting edge and a shank portion to be made thin is used to perform working in grooves side finish working process.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: May 1, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoaki Nakasuji, Yusaku Miyamoto, Yasunori Matsumoto, Tetuji Kawakami
  • METHOD AND APPARATUS FOR WORKING A SCREW ROTOR, END MILL FOR WORKING , AND METHOD OF MANUFACTURING A SCREW COMPRESSOR
    Publication number: 20090217528
    Abstract: A method of improving working of grooves of a screw rotor, in particular, working of grooves side in working efficiency, a working apparatus, a working tool, and a method of manufacturing a screw compressor are provided. A method of controlling rotation of a work and turning of a tool at a time to form a screw tooth space based on a five-axis NC machine, and a special end mill having a cutting edge of a short length and a neck portion provided between the cutting edge and a shank portion to be made thin is used to perform working in grooves side finish working process.
    Type: Application
    Filed: July 10, 2008
    Publication date: September 3, 2009
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tomoaki NAKASUJI, Yusaku Miyamoto, Yasunori Matsumoto, Tetuji Kawakami