Patents by Inventor Do Sig Choi

Do Sig Choi 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-type compressor having securing blocks and multiple discharge ports
    Patent number: 6056523
    Abstract: A scroll-type compressor has multiple discharge ports and blocks to prevent undesired movement of the non-orbiting scroll plate and an improved lubrication system.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: May 2, 2000
    Assignee: Kyungwon-Century Co., Ltd.
    Inventors: Hiun Won, Do Sig Choi, Jae Kil Shim, Young Hun Cho
  • Scroll-type compressor having improved pressure equalizing passage configuration
    Patent number: 5833442
    Abstract: A scroll-type compressor has a scroll plate with at least first and second pressure equalizing passages formed in its end plate such that the first and second pressure equalizing passages will be in the same crescent shaped pocket during at least a portion of a crescent shaped pocket's radially inward movement. The minimum pressure in a back pressure pocket will be adequate to maintain a good seal, any pressure increases will increase in accordance with the increased pressure in the crescent shaped pockets. At no point are both of the pressure equalizing passages blocked and, therefore, the pressure in the interior space does not overwhelm the effective functioning of the back pressure pocket.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: November 10, 1998
    Inventors: Wan Pyo Park, Hiun Won, Do Sig Choi, Yong Hun Cho