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Great idea, would save many lives...if it where possible.

The idea is innovative and it would be handy. I for one would like to have one, maybe there will be instances that you were walking in the corridor of the school and the Chem lab was engulf in flames. With the grenade you can just throw it then problem solve. Plus its fun to have one ^^

I seen one the other day on TV somewhere. A little bigger than a grenade though, maybe the size of a luckbox. You pulled a cord to trigger the device, throw it towards the fire, and it emits fire extinguishing chemicals.

Since it is a fire grenade,why not have it heat activated mearly pitch it in the fire and take cover (shrapnel is nasty stuff). A paper body would be better.

Compression of enough C02/foam to extinguish a room in the size of a grenade isn't possible. It is only possible with ideal gasses, and real gasses are far from ideal.

Even those big scuba-tank size ones aren't all that great.

Great idea. There is an old international patent application by some Israeli inventors that describes how to make and use fire extinguisher grenades with non CFC depleting chemicals. I don't know if it ever became commercial, but you can see how they did it at

The application number is WO9419060A1: FIRE EXTINGUISHING METHODS AND SYSTEMS

Oops, here's the link

http://www.delphion.com/cgi-bin/viewpat.cmd/WO09419060A1?MODE=fstv&OUT_FORMAT=pdf

The earliest chemical fire extinguishers in the 19th century took the form of grenades. I don't know why they died out in favour of tank-and-hose extinguishers, but you should look into it if you plan to do anything with this.

great idea! but possibly dangerous to victims inside, if the smoke wasnt enough a grenade producing Co2 or foam might choke them. Cant think of anything thats safe to humans but deadly to fire, both need oxygen and heat

Seems someone has finally ran with the idea. Saw it on some Discovery Network show (forget which), a shoebox-size device capable of flooding an enclosed space with heavy non-flammable gas, choking the fire in minutes. Not sure anything grenade-sized can be constructed to similar effect, but I think the focus was on providing "fight-and-forget" functionality, allowing the fire to be contained in situations where a manned response was impractical.

Russian military has these. I don't know how well they work though.Check this out: (from a book about russian military hardware)Lotos Hand-Operated fire extinguishing unit