Donald R Bennett

US Patent:

20040099409, May 27, 2004

Filed:

Nov 25, 2002

Appl. No.:

10/304668

Inventors:

Donald Bennett - Franklin KY, US
Liangyou Tang - Cottontown TN, US
James Bryan - Columbia MO, US

International Classification:

F28F001/14

US Classification:

165/184000, 165/133000

Abstract:

A heat exchanger tube that comprises a tubular member having a longitudinal axis and having an inner surface that is divided into at least two regions along the circumferential direction. A first plurality of polyhedrons are formed on the inner surface along at least one polyhedral axis. Each of the polyhedrons have four opposite sides. The polyhedrons have first and second faces that are disposed parallel to the polyhedral axis and have third and fourth faces disposed oblique to the polyhedral axis. The polyhedral axis is disposed at a first helical angle with respect to the longitudinal axis of the tube. A second plurality of polyhedrons is formed on the inner surface adjacent to the first plurality of polyhedrons. The second plurality of polyhedrons is disposed along at least one polyhedral axis. Each of the polyhedrons has four opposite sides. The polyhedrons have first and second faces disposed parallel to the polyhedral axis and have third and fourth faces disposed oblique to the polyhedral axis. The polyhedral axis is disposed at a second helical angle with respect to the longitudinal axis of the tube. The orientation of the second helical angle is opposite to the orientation of the first helical angle.

US Patent:

20050067156, Mar 31, 2005

Filed:

Jul 15, 2004

Appl. No.:

10/893629

Inventors:

Edward Rottmann - Bowling Green KY, US
Donald Bennett - Franklin KY, US
Timothy Goebel - Woodburn KY, US
Stieg Andersson - Kolback, SE
Liangyou Tang - Hendersonville TN, US

International Classification:

F28F009/02

US Classification:

165177000

Abstract:

A heat transfer tube and a method of forming a heat transfer tube with indents formed in the opposed walls. The indents may be cold welded or forge welded such that dimples or indentations meet in the middle of the tube. The bottom of a first indentation disposed on a first side of the tube is welded to the bottom of a second indentation formed in the opposite side of the tube.

US Patent:

20050126757, Jun 16, 2005

Filed:

Dec 16, 2003

Appl. No.:

10/737083

Inventors:

Donald Bennett - Franklin KY, US
Liangyou Tang - Hendersonville TN, US
Edward Rottmann - Bowling Green KY, US

International Classification:

F28D015/00

US Classification:

165104110

Abstract:

An internally enhanced heat pipe with a groove opening size that is smaller than the size of the groove bottom.

US Patent:

20070137848, Jun 21, 2007

Filed:

Nov 13, 2006

Appl. No.:

11/599219

Inventors:

Donald Bennett - Franklin KY, US
Liangyou Tang - Cottontown TN, US
James Bryan - Columbia MO, US

International Classification:

F28F 1/36

US Classification:

165184000

Abstract:

A heat exchanger tube that comprises a tubular member having a longitudinal axis and having an inner surface that is divided into at least two regions along the circumferential direction. A first plurality of polyhedrons are formed on the inner surface along at least one polyhedral axis. Each of the polyhedrons have four opposite sides. The polyhedrons have first and second faces that are disposed parallel to the polyhedral axis and have third and fourth faces disposed oblique to the polyhedral axis. The polyhedral axis is disposed at a first helical angle with respect to the longitudinal axis of the tube. A second plurality of polyhedrons is formed on the inner surface adjacent to the first plurality of polyhedrons. The second plurality of polyhedrons is disposed along at least one polyhedral axis. Each of the polyhedrons has four opposite sides. The polyhedrons have first and second faces disposed parallel to the polyhedral axis and have third and fourth faces disposed oblique to the polyhedral axis. The polyhedral axis is disposed at a second helical angle with respect to the longitudinal axis of the tube. The orientation of the second helical angle is opposite to the orientation of the first helical angle.

US Patent:

61763012, Jan 23, 2001

Filed:

Dec 4, 1998

Appl. No.:

9/206275

Inventors:

Donald L. Bennett - Franklin KY
Liangyou Tang - Cottontown TN

Assignee:

Outokumpu Copper Franklin, Inc. - Franklin KY

International Classification:

F28F 1318
F28F 114
F28F 136

US Classification:

165133

Abstract:

A heat transfer tube having an inner surface provided with a dense pattern of polyhedrons having crack-like cavities on at least two surfaces of a single polyhedron, forming three-dimensional crack-like cavities that enhance flow evaporation heat transfer. The tube is made by (a) forming in an inner surface for the tube a plurality of generally parallel first grooves, (b) forming in the inner surface and over the first grooves a plurality of generally parallel second fins extending at a first angle of between 0 and about 25 degrees relative to a longitudinal axis for the tube to thereby devolve the second angle fins into the pattern of cavities, and (c) forming in the second fins a pattern of generally parallel crosshatches extending cross-wise thereto.

US Patent:

61827436, Feb 6, 2001

Filed:

Nov 2, 1998

Appl. No.:

9/184187

Inventors:

Donald L. Bennett - Franklin KY
Liangyou Tang - Cottontown TN

Assignee:

Outokumpu Cooper Franklin Inc.

International Classification:

F28F 1318
F28F 120
F28F 130

US Classification:

165133

Abstract:

A heat exchanger tube having an internal surface that is configured to enhance the heat transfer performance of the tube. The internal enhancement has a plurality of polyhedrons extending from the inner wall of the tubing. The polyhedrons have first and second planar faces disposed substantially parallel to the polyhedral axis. The polyhedrons have third and fourth faces disposed at an angle oblique to the longitudinal axis of the tube. The resulting surface increases the internal surface area of the tube and the turbulence characteristics of the surface, and thus, increases the heat transfer performance of the tube.