Patent ID: 7458427
Filing Date: 2008-12-02
Classification: A62C

Abstract:
1. A mixing chamber for producing compressed foam for an extinguishing device for fire fighting, the mixing chamber defining a contour, the mixing chamber comprising: a compressed air inlet communicating with a compressed air duct connected to a compressed air source; an extinguishing agent inlet connected to an extinguishing agent container; a compressed air foam outlet, the contour of said mixing chamber tapering towards said compressed air foam outlet; and a foam controller behind said compressed air foam outlet, said foam controller selectively providing a disturbance element in a passageway defined by said compressed air foam outlet, said foam controller comprises a switch element which can be shifted between first and second positions transverse to a flow direction of the compressed air foam, and said switch element selectively keeps said passageway defined by a duct connected to said compressed air foam outlet free when in the first position, and provides said disturbance element in said duct when in the second position.