Patents by Inventor David M. Mahrt

David M. Mahrt 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).

  • Fire Suppression System with Vaporizing Liquid Gas and AFFF Foam Concentrate
    Publication number: 20120090862
    Abstract: A foam generating, hand portable or handheld fire extinguisher contains a mixture of an aqueous film forming foam solution and vaporizing liquid gas under pressure of a relatively inert gas.
    Type: Application
    Filed: October 14, 2011
    Publication date: April 19, 2012
    Inventor: David M. Mahrt, SR.
  • Cold compressed air foam fire control apparatus
    Patent number: 6089324
    Abstract: A portable fire suppression system which uses cold compressed air foam to extinguish fires. A solution suitable for generating foam is mixed with air in an expansion manifold where the foam is supercharged and expands up to 40 times original volume. The foam is discharged out a nozzle controlled by a charge valve which controls flow rate and moisture content of the foam. The fire suppression system is mounted on a compact sturdy frame capable of withstanding parachute drops to remote sites, and includes a frame with a hitch and wheels for ground mobility.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: July 18, 2000
    Inventor: David M. Mahrt
  • Cold compressed air foam fire control apparatus
    Patent number: 5881817
    Abstract: A portable fire suppression system which uses cold compressed air foam to extinguish fires. A solution suitable for generating foam is mixed with air in an expansion manifold where the foam is supercharged and expands up to 40 times original volume. The foam is discharged out a nozzle controlled by a charge valve which controls flow rate and moisture content of the foam. The fire suppression system is mounted on a compact sturdy frame capable of withstanding parachute drops to remote sites, and includes a frame with a hitch and wheels for ground mobility.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: March 16, 1999
    Inventor: David M. Mahrt
  • Mixing and drop system for fire retardants
    Patent number: 4601345
    Abstract: A fire retardant mixing and drop system for use with aircraft including a reservoir for holding fire retardant concentrate, a bucket, an injection and agitation or mixing system, and a dumping system for dumping fire retardant on a fire.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: July 22, 1986
    Inventor: David M. Mahrt