Patents by Inventor Chi-Hong Shen

Chi-Hong Shen 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).

  • Patent number: 6213936
    Abstract: A system for initiating urine flow in intraurethral bladder control devices having a housing, a flow lumen, a valve biased to close, a distal end disposed near the urethral meatus, and a proximal end disposed near the bladder. The system includes an actuator device to open the valve. One intraurethral bladder control device has a higher velocity flow region near the valve distal end, such that the Bernoulli effect generates a negative pressure on the valve, keeping the valve in an open position once urine flow commences. One valve includes a spring biased stopper in the urine flow lumen. One actuator device is a suction device adapted to mate to the intraurethral device distal end and capable of pulling the stopper into the open position. Suction devices include plungers, syringes, and squeezable bulbs. Another actuator device includes a magnet capable of moving a magnetically responsive stopper.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: April 10, 2001
    Assignee: HK Medical Technologies Incorporated
    Inventors: Craig Nishioka, Chi-Hong Shen