Patents by Inventor Robert J. Grindal

Robert J. Grindal 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).

  • Automatic milking apparatus
    Patent number: 4803950
    Abstract: The method of automatic milking comprising the step of drawing the milk from the teat past one or more non-return valves without the introduction of air into the milk flow upstream of the valve or valves. An automatic milking apparatus for carrying out the method comprises one or more one-way clawpieces and pneumatically-isolated teat liners.
    Type: Grant
    Filed: March 16, 1988
    Date of Patent: February 14, 1989
    Assignee: National Research Development Corporation
    Inventors: Tony K. Griffin, Robert J. Grindal, Barry R. Marshall