Patents by Inventor Jeffrey E. Purdy

Jeffrey E. Purdy 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).

  • Overhung rotary tube furnace
    Patent number: 8485815
    Abstract: A rotary tube furnace (1) comprising an insulated heating chamber (4), the insulated heating chamber having a product discharge outlet (21) and a process tube inlet (39), a heating element (14) operatively arranged to selectively heat the heating chamber, a generally horizontally extending process tube (2) supported for rotation relative to the heating chamber, the process tube having a first portion (36) generally arranged outside of the heating chamber and a cantilevered second portion (37) extending from the first portion into the heating chamber and terminating at a discharge end (38) within the heating chamber, a feed mechanism (40) configured and arranged to feed product into the process tube, and a bearing assembly operating between a support frame (34) and the first portion of the process tube and configured and arranged to support the process tube and transmit rotational torque to the process tube.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 16, 2013
    Assignee: Harper International Corporation
    Inventors: Peter R. Witting, William J. Stry, Carl H Vander Weide, Jeffrey E. Purdy, Jason A. Ginn
  • Overhung rotary tube furnace
    Publication number: 20090286193
    Abstract: A rotary tube furnace (1) comprising an insulated heating chamber (4), the insulated heating chamber having a product discharge outlet (21) and a process tube inlet (39), a heating element (14) operatively arranged to selectively heat the heating chamber, a generally horizontally extending process tube (2) supported for rotation relative to the heating chamber, the process tube having a first portion (36) generally arranged outside of the heating chamber and a cantilevered second portion (37) extending from the first portion into the heating chamber and terminating at a discharge end (38) within the heating chamber, a feed mechanism (40) configured and arranged to feed product into the process tube, and a bearing assembly operating between a support frame (34) and the first portion of the process tube and configured and arranged to support the process tube and transmit rotational torque to the process tube.
    Type: Application
    Filed: May 7, 2009
    Publication date: November 19, 2009
    Inventors: Peter R. Witting, William J. Stry, Carl H. Vander Weide, Jeffrey E. Purdy, Jason A. Ginn