Patents by Inventor Chun H. Cho

Chun H. Cho 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).

  • Pipeline pressure control system
    Patent number: 4934399
    Abstract: A pipeline pressure control system for minimizing pressure surges within a pipeline includes a suction pressure controller connected to a suction pressure transmitter for sensing the pipeline pressure upstream of a valve and a discharge pressure controller connected to a discharge pressure transmitter for sensing the pipeline pressure downstream of the valve. If either the suction pressure controller or the discharge pressure controller senses a pressure that varies more than a predetermined amount from a predetermined target pressure, the valve will automatically be moved to a predetermined position in order to counteract pressure surges.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: June 19, 1990
    Assignee: Fisher Controls International, Inc.
    Inventor: Chun H. Cho