Patents by Inventor Do Yean Lee

Do Yean Lee 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).

  • Nonferrous metal pipe coupling structure
    Patent number: 6450551
    Abstract: The invention is to provide a coupling structure of corrosion resistance for nonferrous metal piping.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: September 17, 2002
    Inventor: Do Yean Lee
  • Pipe coupler
    Patent number: 6092844
    Abstract: A pipe coupler for connecting pipes together is disclosed. The pipe coupler includes a cylindrical socket. A pair of insertion grooves are formed inside the socket, and each of a pair of packings is inserted into each of the insertion grooves to seal off connecting portions of two pipes. A plurality of withdrawing paths are formed inside both end portions of the socket, and a pair of binding grooves respectively communicate to the pluralities of the withdrawing paths. A plurality of protuberances are formed on each of the connecting portions of the two pipes correspondingly to the plurality of the withdrawing paths, for being inserted into the plurality of the withdrawing paths. The connecting portions of the two pipes are slightly rotated after entering into the socket so as to make the protuberances disposed within the binding grooves and between the withdrawing paths.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: July 25, 2000
    Inventor: Do Yean Lee