Patents by Inventor Feng-Nan Lin

Feng-Nan Lin 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).

  • Gas-liquid supersonic cleaning and cleaning verification spray system
    Patent number: 5730806
    Abstract: A gas-liquid cleaning spray system employs one or more converging-diverging nozzles to accelerate a gas-liquid mixture to a supersonic velocity for cleaning various types of articles, such as mechanical, electrical and fluid components. The gas, such as air or nitrogen, is supplied at high pressure to a nozzle body where it is mixed with cleaning liquid, such as water or liquid detergent, which is supplied to the nozzle body at a relatively low flow rate. Acceleration of the gas-liquid mixture to a supersonic velocity eliminates the need for a high pressure, high flow rate and high volume liquid supply. After the components are contacted with the gas-liquid mixture, the cleaning liquid can be recaptured and analyzed for cleanliness verification of the components.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: March 24, 1998
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics & Space Administration
    Inventors: Raoul E. B. Caimi, Feng-Nan Lin, Eric A. Thaxton