Patents by Inventor Anderw C. Keefe

Anderw C. Keefe 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).

  • SHAPE MEMORY ALLOY HEAT ENGINES AND ENERGY HARVESTING SYSTEMS
    Publication number: 20120216524
    Abstract: A heat engine includes a first rotatable pulley and a second rotatable pulley spaced from the first rotatable pulley. A shape memory alloy (SMA) element is disposed about respective portions of the pulleys at an SMA pulley ratio. The SMA element includes first spring coil and a first fiber core within the first spring coil. A timing cable is disposed about disposed about respective portions of the pulleys at a timing pulley ratio, which is different than the SMA pulley ratio. The SMA element converts a thermal energy gradient between the hot region and the cold region into mechanical energy.
    Type: Application
    Filed: December 30, 2011
    Publication date: August 30, 2012
    Inventors: Alan L. Browne, Nancy L. Johnson, Paul W. Alexander, Anderw C. Keefe, Guillermo A. Herrera, Peter Maxwell Sarosi, James RYan Yates