Patents by Inventor Charles L. Dunsworth

Charles L. Dunsworth 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).

  • Hygroscopic composition for fire resistant expansion joint cover
    Patent number: 4649129
    Abstract: Fire-resistant expansion joint apparatus of a type having opposed base connectors secured to movable structures defining an expansion void therebetween, and a fire barrier assembly slidingly maintained between said base connectors with a saturated adsorbent contained within the barrier assembly that releases coolant liquid by a wicking process into cooling chambers formed within said base connectors during application of high heat condition.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: March 10, 1987
    Assignee: Metalines, Inc.
    Inventor: Charles L. Dunsworth
  • Smoke and heat barrier
    Patent number: 4566242
    Abstract: A heat insulative barrier for use in isolating potential fire zones relative to expansion joint voids which comprises the use of a sealed sheet of ceramic felt material secured across an expansion void and including one or more refractory cloth sheets sealingly secured contiguous to the ceramic felt sheet on one or both sides thereof and adjacent to the potential fire zone.
    Type: Grant
    Filed: December 2, 1983
    Date of Patent: January 28, 1986
    Assignee: Metalines, Inc.
    Inventor: Charles L. Dunsworth
  • Wide extension expansion joint assembly
    Patent number: 4557082
    Abstract: Apparatus for covering relatively wider building structure expansion voids which includes a cover panel, base member extrusions for opposite side support and a lazy tong centering assembly for both supportive attachment to the cover panel and maintaining proper alignment and relative positioning to said void in tolerance of orthogonal relative displacements between adjacent structures.
    Type: Grant
    Filed: May 17, 1984
    Date of Patent: December 10, 1985
    Assignee: Metalines, Inc.
    Inventor: Charles L. Dunsworth
  • Phosphorescent tread plate and composition
    Patent number: 4522861
    Abstract: A wear-resistant phosphorescent material consisting of a mixture of a selected ratio of phosphorescent pigment and bleached aluminum oxide as carried by a catalyst-hardened epoxy resin, such phosphorescent material being placeable in selected array on a tread plates or other tread surface.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: June 11, 1985
    Assignee: Metalines, Inc.
    Inventor: Charles L. Dunsworth
  • Fire resistant expansion joint cover
    Patent number: 4517779
    Abstract: Fire-resistant expansion joint apparatus of a type having opposed base connectors secured to movable structures defining an expansion void therebetween, and a fire barrier assembly slidingly maintained between said base connectors with a saturated adsorbent contained within the barrier assembly that releases coolant liquid by a wicking process into cooling chambers formed within said base connectors during application of high heat condition.
    Type: Grant
    Filed: February 9, 1983
    Date of Patent: May 21, 1985
    Assignee: Metalines, Inc.
    Inventor: Charles L. Dunsworth