Patents by Inventor Tomohito AKIYAMA

Tomohito AKIYAMA 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).

  • Scroll compressor
    Patent number: 10247188
    Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a suction section, a discharge section, and an electric motor. A sliding surface of a scroll is formed outside a wrap with a depression section depressed with respect to a sliding surface and a flange section elevated with respect to the depression section. The flange section is a remaining region in a protruding region disposed outside a referential perfect circle, the remaining region being other than a region continuing to an end of an involute curve of a scroll formed with the flange section, the referential perfect circle having a radius set to a distance between the center of the scroll formed with the flange section and the end of the involute curve. The scroll compressor enhances reduction of the sliding loss with a simple structure and reduction of the refrigerant leakage loss in the entire compression chambers.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: April 2, 2019
    Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.
    Inventors: Naoki Masuda, Tomohito Akiyama, Shuhei Niimura, Taiga Fuchino, Tetsuya Tadokoro, Masatsugu Chikano
  • SCROLL COMPRESSOR
    Publication number: 20180306186
    Abstract: A scroll compressor includes a fixed scroll, an orbiting scroll, a suction section, a discharge section, and an electric motor. A sliding surface of a scroll is formed outside a wrap with a depression section depressed with respect to a sliding surface and a flange section elevated with respect to the depression section. The flange section is a remaining region in a protruding region disposed outside a referential perfect circle, the remaining region being other than a region continuing to an end of an involute curve of a scroll formed with the flange section, the referential perfect circle having a radius set to a distance between the center of the scroll formed with the flange section and the end of the involute curve. The scroll compressor enhances reduction of the sliding loss with a simple structure and reduction of the refrigerant leakage loss in the entire compression chambers.
    Type: Application
    Filed: August 23, 2017
    Publication date: October 25, 2018
    Inventors: Naoki MASUDA, Tomohito AKIYAMA, Shuhei NIIMURA, Taiga FUCHINO, Tetsuya TADOKORO, Masatsugu CHIKANO