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US 4,344,489 AGranted
Aerial forest fire extinguishing device
OwnerAl Bonaparteinventor
Life of this patent
Estimating the term…
Abstract
A forest fire extinguishing device comprising a projectile filled with an inert gas under pressure which is dropped into a fire and automatically disperses the gas. When the device impacts the ground, a plurality of ports are simultaneously opened, allowing the fire extinguishing material to be expelled over a prescribed area.
Claims2
An aerial forest fire extinguishing device which disperses its contents on impact with the ground, comprising:
- an elongated, hollow body having an interior surface and having a plurality of ports therethrough, a bottom and an opposed end and capable of storing an inert gas under pressure;
- a shaft longitudinally extending through said body and having opposed ends which are external of said body, said shaft being slideably received through said body;
- a point capable of penetrating the ground and formed at the termination of the end of said shaft adjacent said bottom;
- means for preventing the penetration of said body into the ground upon said impact;
- closure means for said ports which are moveable between a closed position and an open position;
- means for maintaining said closure means in said closed position prior to said impact and said shaft is coupled to the closure means so that as the point impacts with the ground the shaft is moved upwardly causing the closure means to move to the open position, and a plurality of rings which are radially spaced along said shaft within said body and which have outer peripheries which are secured to said interior surface to provide an internal brace for said device, said shaft being slideable through the center of said rings.
3 more elements
An aerial forest fire extinguishing device which disperses its contents on impact with the ground, comprising:
- an elongated, hollow body having an interior surface and having a plurality of ports therethrough, a bottom and an opposed end and capable of storing an inert gas under pressure;
- a shaft longitudinally extending through said body and having opposed ends which are external of said body, said shaft being slideably received through said body;
- a point capable of penetrating the ground and formed at the termination of the end of said shaft adjacent said bottom;
- means for preventing the penetration of said body into the ground upon said impact;
- closure means for said ports which are moveable between a closed position and an open position;
- means for maintaining said closure means in said closed position prior to said impact, said closure means including doors of sufficient dimension to overlie each of said ports and hinge means connecting said doors to said shaft so that as said point impacts the ground, said shaft is moved upwardly causing said doors to simultaneously move to said open position thereby dispersing said contents and wherein said maintaining means includes a cylinder connected to said preventing means and a piston moveable within said cylinder between an extended position and a retracted position and having an exposed end which is secured to said bottom, said piston being in said extended position prior to said impact so that said shaft extends from said bottom of said shaft to keep said doors in said closed position.
3 more elements
Dependencies are inferred from the claim text.