Patents by Inventor Jack L. Womack

Jack L. Womack 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).

  • Patent number: 5816314
    Abstract: An improved geothermal heat exchange unit, which can be placed in ground and/or water, has a rigid hollow core about which is formed a helical winding of thermally conductive tube. The return section of the tube extends vertically along a central axis of the core, separated from the inner wall of the core by thermal insulating material. The heat exchange unit is optionally encased in a solid thermally conductive casing and may have a small diameter oil return tube from the lowermost portion of the unit to the suction intake port of a gas compressor. An optional high pressure water hose is attached for installation assistance in wet sand or wet soils.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: October 6, 1998
    Inventors: B. Ryland Wiggs, Jack L. Womack, William C. Bickford, John E. Hawk
  • Patent number: 5671608
    Abstract: A geothermal direct expansion heat pump system wherein subterranean heat exchange tubes have an internal diameter to length ratio of between 1/4000 and 1/6000, with 5 tubes per ton of BTU capacity; where the interior air heat exchange tubes have 50% of the interior volume of the subterranean tubes; where the thermal expansion valve is sized to match the interior air handler capacity; where the receiver holds 75% to 95% of the total refrigerant volume; where a pump down sequence is employed on system shut down; where an oil trap is installed at the vapor line existing the subterranean heat exchange tubes; and where 4 refrigerant cut-off/isolation valves are installed for service convenience.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: September 30, 1997
    Assignee: Geothermal Heat Pumps, Inc.
    Inventors: B. Ryland Wiggs, Jack L. Womack, William C. Bickford