Patents by Inventor Helmut Andris

Helmut Andris 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).

  • Mixing chamber for producing compressed air foam for fire extinguishing devices
    Patent number: 7458427
    Abstract: The invention relates to a mixing chamber for producing compressed air foam in fire extinguishing devices. The mixing chamber has a compressed air inlet, an extinguishing agent inlet and a compressed air foam outlet. The contour of the mixing chamber tapers towards the compressed air foam outlet. The invention also includes a fire extinguishing device. The fire extinguishing device includes an extinguishing agent container, a connecting device for connecting a source of compressed air to a mixing chamber of the kind described above.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: December 2, 2008
    Inventors: Ulrich Braun, Helmut Andris
  • Mixing chamber for producing compressed air foam for fire extinguishing devices
    Publication number: 20030010506
    Abstract: The invention relates to a mixing chamber for producing compressed air foam in fire extinguishing devices. The mixing chamber has a compressed air inlet, an extinguishing agent inlet and a compressed air foam outlet. The contour of the mixing chamber tapers towards the compressed air foam outlet. The invention also includes a fire extinguishing device. The fire extinguishing device includes an extinguishing agent container, a connecting device for connecting a source of compressed air to a mixing chamber of the kind described above.
    Type: Application
    Filed: August 26, 2002
    Publication date: January 16, 2003
    Inventors: Ulrich Braun, Helmut Andris