Patents by Inventor Griffith T. Roberts

Griffith T. Roberts 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).

  • Solar energy collector
    Patent number: 4535755
    Abstract: A solar energy collector comprises a central metal manifold 10 with five separate glass vacuum vessels 11,12 positioned on opposite sides and offset or staggered, the vessels being sealed to the manifold plate 16 while a continuous metal conduit 13 extends in a zig zag continuous looped path from end to end through all the vessels. This provides continuous vacuum communication between all the vessels and there is no need for vacuum seals where the conduit passes through the manifold except at the two end seals 18,19.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: August 20, 1985
    Inventor: Griffith T. Roberts
  • Vibrating vane pressure gauge
    Patent number: 4409840
    Abstract: In a vibrating vane pressure gauge in which a plane metal vane is vibrated in an enclosure of only slightly larger area than the vane and the decay of the vibration (which is proportional to gas pressure) is sensed, the vane is provided with at least one lip along an edge of the vane.
    Type: Grant
    Filed: March 24, 1982
    Date of Patent: October 18, 1983
    Assignee: National Research Development Corporation
    Inventor: Griffith T. Roberts