Patents by Inventor Robert Henry Sinclair

Robert Henry Sinclair 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).

  • Generating displacement and theroacoustic refrigerator
    Patent number: 6490881
    Abstract: A displacement generator (10) has a housing (12) defining a chamber (14) containing an incompressible liquid (15). A port (22) of the housing (12) is closed by a movable member (24). Within the chamber (14), opposing, convex, flexible walls (16.1, 16.2) form an internal modulating chamber (18), which optionally contains a compressible gas. Opposed ends of the walls (16.1, 16.2) can be displaced toward and away from each other by a motion transducer, e.g. a stack of ceramic piezoelectric members (20), respectively to pressurize and depressurize the chamber (14) and thus to displace the member (24) to and fro to form an output of the displacement generator.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: December 10, 2002
    Assignee: CSIR
    Inventors: Robert Henry Sinclair, Philip Loveday, David Ronald Jones, Michael Yuri Shatalov, Frederik A. Koch, Jeremy Wallis, Johannes Nicolaas Bothma, Jonathan Du Pre Le Roux