Patents by Inventor Harold Gene Harvard, Jr.

Harold Gene Harvard, Jr. 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).

  • Tubular heat exchanger with offset interior dimples
    Patent number: 6945320
    Abstract: A tubular heat exchanger has at least one pair of dimples which are extruded into at least one tube of the heat exchanger by deforming the tube wall inwardly. The dimples of each pair are in generally facing relationship, but are offset with respect to each other along a longitudinal axis of the tube, which slows down the flow of flue gas in the tube when the heat exchanger is in operation and increases the turbulence of the gas, thereby enhancing the transfer of heat from the flue gas to air flowing across the outer surfaces of the heat exchanger. The offset design allows each dimple to protrude beyond the centerline of the tube, which alters the direction of the flue gas flowing in the tube.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: September 20, 2005
    Assignee: Lennox Manufacturing Inc.
    Inventors: Harold Gene Harvard, Jr., Steven Schneider, Eric M. Perez