Patents by Inventor Daniel G. Cray

Daniel G. Cray 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).

  • Apparatus for testing lubricants
    Patent number: 4133200
    Abstract: Apparatus suitable for the assessment of lubricants for the slides of machine tools, comprises a fixed slide carrier block, a moving slide block, and a drive block moving parallel to the slides at constant speed, under the action of a motor. The drive block carries a bracket with a lever which makes it possible to load the moving slide block and has a compressible elastic element to push the moving slide block. A comparator dial and an electric displacement sensor are connected to a recorder, so as to display and record the relative movements of the fixed and moving slide blocks.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: January 9, 1979
    Assignee: The British Petroleum Company Limited
    Inventor: Daniel G. Cray