Patents by Inventor Lawrence W. Hallanger

Lawrence W. Hallanger 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).

  • Flat plate solar energy collector
    Patent number: 4136672
    Abstract: Apparatus for collecting solar radiation in the form of heat and transferring it to a working fluid, including in combination, a collector surface and a highly porous open cell material used as a fluid carrier which abuts and allows the working fluid to contact the back side of the collector surface.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: January 30, 1979
    Inventor: Lawrence W. Hallanger
  • Gas vent system for operation in any arbitrary spatial orientation
    Patent number: 3967633
    Abstract: A gas vent tube for removing gas from a container while minimizing loss of iquids. The vent is mounted in a cylindrical container on a 360.degree. rotating joint and has a buoyant material attached to always maintain the vent in an upright position. The pickup tube also has a buoyancy closure valve to prevent the loss of liquid when the end of the pickup tube is not in a gas, and may be provided with a check valve when the container is submerged in a second liquid to prevent the intrusion of the second liquid into the container.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: July 6, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Lawrence W. Hallanger, Leroy W. Tucker