Patents by Inventor Chad Qinsheng Cai

Chad Qinsheng Cai 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).

  • Catheter connector including seal ring and method
    Patent number: 6562023
    Abstract: A catheter connector includes an outlet tube (34, 36), and a compression seal (140) defining an undulating shape to product ring seals during use. A cam slot formed on a lever arm is useable in locking a locking sleeve (120) of the connector. The lever arm acts as a compensating mechanism for over compression of the seal. The catheter tip (32a) is received in a tip recess (92) of the connector. The connector is useable on an implanted port (20), including a dual port with parallel outlet tubes (34, 36), and a dual lumen catheter (24).
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: May 13, 2003
    Assignee: Deltec Inc.
    Inventors: James C. Marrs, Chad Qinsheng Cai, William L. Beling, Harry A. Puryear