Patents by Inventor John R. Askew

John R. Askew 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).

  • Powder coating system incorporating improved method and apparatus for monitoring flow rate of entrained particulate flow
    Patent number: 5739429
    Abstract: A system for monitoring the flow rate of particulate material entrained within an air stream includes a feed hopper providng a source of the particulate material, and a hose for conveying the particulate material within the air stream. A pump draws the particulate material from the feed hopper and transports the particulate material with the air stream through the hose. A flow meter is associated with the hose and measures the mass flow rate of the particulate material through the hose to provide a first flow indication. A device is associated with the feed hopper and measures the change in weight of the feed hopper over a predetermined interval to provide a second flow indication. A controller corrects the first flow indication from the flow meter according to the second flow indication from the gravimetric device.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: April 14, 1998
    Assignee: Nordson Corporation
    Inventors: James W. Schmitkons, Richard P. Price, John R. Askew, Jan L. Shanaberger