Patents by Inventor Karen J. Manning

Karen J. Manning 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).

  • Cryogenic waterpump
    Patent number: 5261244
    Abstract: A cold trap includes a set of baffles cooled by the cold finger of a closed cycle refrigerator. The baffles are vertically disposed in a vertical fluid conduit with frustoconical and conical surfaces for directing liquid to a circular trough during regeneration. After the liquid is collected, it is blown from the trough through a pressure relief valve by a nitrogen purge. The trough is formed in the upper surface of a connecting flange at the lower end of the fluid conduit.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: November 16, 1993
    Assignee: Helix Technology Corporation
    Inventors: Philip A. Lessard, Douglas F. Aitken, Robert D. Bradford, Roland P. Graham, Steven A. Michaud, Karen J. Manning