Foam generating device for fire-fighting helicopter

Details Foam generating device for fire-fighting helicopter Foam generating device for fire-fighting helicopter

1996-07-23

1997-12-23

Hoge, Gary C.

Fire extinguishers

Mount, cabinet or guard

Movable relative to fire

169 15, 244136, B64D 118

Patent

active

056998627

ABSTRACT:
A helicopter (20) is equipped with a foam generating device (22) comprising a tank (1) associated with a pump system (2) and a mixer device (36) to deliver a mixture water-emulsifier. A spraying system (44) comprises two modules (44a, 44b) arranged on the side faces outside the helicopter (20), each module comprising a frame (3) mounted pivotally around and axis (6) between an upward inactive position and a lowered active position, and a network (4) linked with the exhaust pipe of the mixer device (36). The network (4) is placed under the blades (46) of the helicopter (20), and is constituted by a pattern of squares equipped with a multitude of sprinklers (5) which can spray the mixture water-emulsifier over the tight-mesh net (11) to produce foam under the action of the pressurized air generated by the blades (46). The moving of the modules (44a, 44b) between the two lifted and lowered positions is ensured by a lifting device (9) with hydraulic or electric control.

REFERENCES:
patent: 3428131 (1969-02-01), Winslow
patent: 3442334 (1969-05-01), Gousetis
patent: 3580339 (1971-05-01), Nance
patent: 3936018 (1976-02-01), Barlow

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