Patents by Inventor Yoshie Tsujimi

Yoshie Tsujimi 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).

  • Oscillating type compressor
    Patent number: 7980831
    Abstract: An oscillating type piston is connected to an output shaft of an electric motor through a crankshaft. The piston is provided with a lip ring that slidingly contacts a cylinder. The motor is rotated forward and reversely by using a control circuit. Thus, different regions of the piston are subjected to a load during forward rotation of the motor and during reverse rotation thereof. Accordingly, wear of the lip ring can be distributed to different regions thereof.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Shingo Miyake, Yoshie Tsujimi, Takahisa Hirasawa
  • Oscillating type compressor
    Publication number: 20070280833
    Abstract: An oscillating type piston is connected to an output shaft of an electric motor through a crankshaft. The piston is provided with a lip ring that slidingly contacts a cylinder. The motor is rotated forward and reversely by using a control circuit. Thus, different regions of the piston are subjected to a load during forward rotation of the motor and during reverse rotation thereof. Accordingly, wear of the lip ring can be distributed to different regions thereof.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 6, 2007
    Inventors: Shingo Miyake, Yoshie Tsujimi, Takahisa Hirasawa