Fire extinguishers – Fluid systems – Gas-pressure discharge
Patent
1998-03-11
1999-08-31
Morris, Lesley D.
Fire extinguishers
Fluid systems
Gas-pressure discharge
169 16, A62C 3513, A62C 3568
Patent
active
059441127
ABSTRACT:
The invention relates to a drive source for a fire fighting apparatus comprising spray heads (4), the drive source comprising a hydraulic accumulator (5), which comprises a container (9, 10) with extinguishing liquid and a pressure gas source (14) for driving the extinguishing liquid out of the container via a channel (29) to the spray heads. To prevent icing of extinguishing liquid in the container (9) and to make the droplet size small, the drive source is characterized in that the container (9) comprises in its lower part an outlet (28) for conducting extinguishing liquid via the channel (29) out to the spray heads (4) of the fire fighting apparatus, and the container (9) is connected to a liquid container (10) having a rising tube (31) in such a way that the rising tube is arranged to conduct extinguishing liquid to a place (33) in the channel (29), whereby the resistance to a liquid flow via the rising tube has been made stronger than the resistance of the channel (29) to the liquid flow, and that the liquid container is connected via a conduit (24, 25) to the pressure gas source (14) in order to obtain gas pressure from the pressure gas source, whereby a nonreturn valve (26) is arranged in the conduit to prevent liquid from flowing from the liquid container to the pressure gas source.
REFERENCES:
patent: 4622209 (1986-11-01), Nardi et al.
patent: 5657824 (1997-08-01), Sundholm
patent: 5676210 (1997-10-01), Sundholm
patent: 5713417 (1998-02-01), Sundholm
patent: 5738174 (1998-04-01), Sundholm
patent: 5797457 (1998-08-01), Sundholm
patent: 5845713 (1998-12-01), Sundholm
patent: 5845714 (1998-12-01), Sundholm
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