Patents by Inventor Andrew J. Sumberg

Andrew J. Sumberg 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).

  • Protection of heat pipes from freeze damage
    Patent number: 4664181
    Abstract: Disclosed is a heat pipe which is protected from damage due to freezing by the addition of small amount of a liquid such as an alcohol to its working fluid. Ethanol/water mixtures having ethanol concentrations from about 1 to 7.5 percent by volume are found to produce a relatively weak crystal solid during freezing in a heat pipe so that the weak solid breaks up and expands without rupturing a wall or joint of the heat pipe. Heat transfer and operating characteristics of the heat pipe are not degraded due to the presence of specified amounts of the additive.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: May 12, 1987
    Assignee: Thermo Electron Corporation
    Inventor: Andrew J. Sumberg