Patents by Inventor Tim Xing

Tim Xing 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).

  • Method and apparatus for determining presence of moisture in freeze dryer vacuum line
    Patent number: 6968631
    Abstract: A freeze dryer having a collector chamber is provided with a sensor for detecting the presence of moisture in the chamber so that the vacuum pump cannot be operated if moisture is present. The refrigeration system can also be deactivated. This precludes moisture from being pulled into the vacuum pump where it will mix with pump oil and shorten the life of the pump. The moisture sensor is also coupled with a warning circuit which advises the operator that the system is inoperable and is capable of displaying the reason for inoperability.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: November 29, 2005
    Assignee: Labconco Corporation
    Inventors: Lowell Kuhn, Mark Schmitz, Tim Xing