Patents by Inventor Kazuto Higa

Kazuto Higa 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).

  • Hermetic type scroll compressor and refrigerating and air-conditioning apparatus
    Patent number: 7438539
    Abstract: A hermetic type scroll compressor according to the invention includes a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that they slide against each other, an electric motor element which drives the scroll compressor element, a hermetic casing housing the scroll compressor element and the electric motor element and holding lubricating oil collected at a bottom thereof, and an oil separator disposed on a discharge side of the scroll compressor element. An interior of the hermetic casing is kept at an intermediate pressure between a suction pressure and a discharge pressure. An oil return mechanism is provided, which intermittently returns lubricating oil from the oil separator to sliding parts of the orbiting scroll end plate and the fixed scroll end plate. The hermetic type scroll compressor 31 can be improved in performance and reliability while promoting cost reduction.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: October 21, 2008
    Assignees: Hitachi Air Conditioning Systems Co., Ltd, The Tokyo Electric Power Company, Incorporated
    Inventors: Hirokatsu Kohsokabe, Kazuto Higa, Kenji Tojo, Daisuke Kuboi
  • Hermetic type scroll compressor and refrigerating and air-conditioning apparatus
    Publication number: 20060216182
    Abstract: A hermetic type scroll compressor according to the invention includes a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that they slide against each other, an electric motor element which drives the scroll compressor element, a hermetic casing housing the scroll compressor element and the electric motor element and holding lubricating oil collected at a bottom thereof, and an oil separator disposed on a discharge side of the scroll compressor element. An interior of the hermetic casing is kept at an intermediate pressure between a suction pressure and a discharge pressure. An oil return mechanism is provided, which intermittently returns lubricating oil from the oil separator to sliding parts of the orbiting scroll end plate and the fixed scroll end plate. The hermetic type scroll compressor 31 can be improved in performance and reliability while promoting cost reduction.
    Type: Application
    Filed: March 24, 2006
    Publication date: September 28, 2006
    Inventors: Hirokatsu Kohsokabe, Kazuto Higa, Kenji Tojo, Daisuke Kuboi