Abstract: The present system provides an integrated fire suppression system that includes all components other than system piping to nozzles or emitters in a single integrated panel. The system allows the entire panel to be inspected and analyzed, and installed, repaired, or maintained in a single operation, dramatically reducing time spent on site and reducing the qualifying process as well. The assembly of the panel is off-site, typically under the inspection of any qualifying agencies. Once assembled, the system can remain qualified for rapid installation at any future time, allowing easy replacement of faulty panels or consumables.

Abstract: The present disclosure relates to an inner cylinder of an explosion-venting-type aerosol fire extinguishing device, including a cylinder body (3) and a cylinder cover component (4) arranged on one end of the cylinder body (3), and an explosion-venting device arranged on the cylinder body (3). The explosion-venting device includes a friction layer (11), a connecting rod (12), a guiding unit (13), and a limiting device (14). The connecting rod (12) are connected with the cylinder cover component (4). The friction layer (11) is provided between the connecting rod (12) and the cylinder body (3). The friction layer (11) provides a frictional resistance and a buffering force for the connecting rod (12) when the connecting rod (12) is displaced, under the guidance of the guiding unit (13), along a direction that a hot air stream of the cylinder body (3) is jetting towards. The guiding unit (13) is a device capable of providing guidance for the connecting rod (12) when the connecting rod (12) is moving.

Abstract: This invention is directed to a portable foaming apparatus for a handheld fire suppression system having a container holding a foaming agent, water and a pressurized gas, a foam generating assembly having a snorkel, a gas re-directional opening defined in the foam generating assembly allowing gas to enter the re-directional opening from the container; a nozzle in fluid communication with the gas re-directional opening and included in the foam generating assembly downstream of the snorkel so that gas entering the re-directional opening is inserted in the foam generating assembly downstream the snorkel; and, an outlet defined in the housing ejecting foam produced from the foaming agent and the gas when a foam nozzle attached to the foam generating assembly is actuated.

Abstract: An exemplary suppressant actuator assembly includes a release member movable from a first position that restricts flow of a suppressant to a second position that permits flow of a suppressant. A biasing member moves from a more-biased position to a less-biased position to move the release member from the first position to the second position. A solenoid is activated to permit movement of the biasing member.

Abstract: A fluid ejection device for example used as a fire extinguisher in which ejected fluid is an extinguishing agent in liquid or powdery form. The device includes: a cylinder shaped tank, split hermetically, perpendicular to its axis, into two chambers by a piston, slidable axially inside the tank; a first chamber, including a non-gaseous fluid, which communicates with an ejection port closed by a cap, which can open for a pressure greater than or equal to a defined pressure in the first chamber; a second pressurization chamber to be connected to a mechanism increasing pressure in the chamber; and a mechanism to link the piston to the tank in full fixity at a storage position, which mechanism can break and release the piston for axial translation at a pressure higher than or equal to a given pressure in the pressurization chamber, to cause the fluid to be ejected.

Abstract: A fire suppression system for a container including a first tank containing a first liquid component of a two-part foam and a second tank containing a second liquid component of the foam. The system also includes at least one liquid component release device configured to be selectively capable of releasing the first and second components from their respective containers upon receipt of a signal from a fire detector upon detection of a fire. The two-part foam components are propelled through the system by a pressurized propellant that, upon release of the release device, causes the exit of the foam components from their respective tanks, through a mixing conduit to at least one nozzle. The nozzle is configured to spray the liquid component foam mixture into the container wherein the foam cures into a substantially semi-rigid, closed cell foam that is substantially impermeable and may have charring and/or intumescence properties.

Abstract: The present invention relates to automatically activated fire suppression system providing a system that releases fire suppressant foam, or aqueous film forming material (“AFFF”) over a flammable material contained within a storage tank or gas tank, when a heat sensor comprised of glass, plexi-glass or plastic, is compromised (i.e. melted, or broken) by temperatures in the container indicating that the flammable material is are at or near combustion levels.

Abstract: A fire suppression apparatus that includes a housing defining a first chamber containing a gas generant. The apparatus further includes an initiator operatively associated with the first chamber and in reaction initiating communication with the gas generant. The initiator, upon actuation, acts to ignite at least some of the gas generant to form gas. The housing further defines a second chamber adjacently disposed to the first chamber. The second chamber contains an endothermically-alterable material and a piston assembly including a piston. Upon actuation, the piston moves to expel at least a portion of the endothermically-alterable material from the second chamber such that the expelled endothermically-alterable material contacts and cools gas formed by the ignition of the gas generant. The housing further has at least one discharge opening to permit cooled gas to exit the housing. Corresponding or associated methods for suppressing a fire are also provided.

Abstract: An aerosol fire extinguisher for dispensing a liquid wet chemical fire extinguishing agent, and a composition for the liquid wet chemical fire extinguishing agent, where the liquid wet chemical fire extinguishing agent is rated for class A, B, C and K fires. The fire extinguisher includes a container and a valve assembly affixed to the container. A hag is positioned within the container, where the bag includes an output tube connected in fluid communication to the valve assembly. An actuator is connected in fluid communication to the valve assembly opposite the output tube, where. the actuator has an elongated output orifice. A liquid wet chemical fire extinguishing agent is disposed within the bag and a propellant is disposed within the container, wherein the bag isolates the liquid wet chemical fire extinguishing agent from the propellant. The: configuration of the elongated output orifice expels the liquid wet chemical fire extinguishing agent in a substantially planar pattern onto the fire.

Abstract: There is provided a hand-held aerosol fire suppression apparatus, having button, thermal insulating layer, jet nozzle, enclosure of apparatus, combustion chamber, rear fender and rear cap, wherein the enclosure of apparatus has an enclosure of cartridge that accommodate a chemical agent and an enclosure of cooling layer that is filled with a cooling material, the combustion chamber is installed between the enclosure of cartridge and the enclosure of cooling layer, the thermal insulating layer is arranged between the enclosure of apparatus and the enclosure of cartridge, between the enclosure of apparatus and the enclosure of cooling layer, and between the rear fender and the chemical agent. Compared to the prior art, the apparatus has the following advantages: compact in size, suitable for hand-held use, lower temperature at the jet orifice, safe and reliable ignition and operation and long service life.

Abstract: Improvements to a portable fire extinguisher are disclosed. The improvements allow for frequent and simpler untrained and automatic self-servicing of a fire extinguisher. The improvements include an anti-bridging mechanism that fluffs, mixes or stirs the powder within the chamber to keep it in a liquefied state. Additional improvements include a larger opening to more quickly fill and inspect the powder within the chamber. Another improvement includes the use of a CO2 canister located external to the chamber to allow easier servicing or replacement of just the CO2 canister as well as the ability to maintain the chamber in an un-pressurized condition, allows for non-HASMAT shipping. These features will extend the service intervals while maintaining the fire extinguisher in a ready condition.

Abstract: The various embodiments herein provide a system and method for fire extinguishing in forests. The fire extinguishing system herein includes a first storage tank, a second storage tank, a first fire extinguishing element, a second fire extinguishing element, a cover provided on top side of the first storage tank, a compressed air inlet, an air regulator, one or more hosing hasps, one or more tarpaulin hoses, one or more hooks, one or more clips and locks, a nozzle attached to a bottom side of the tank and a pipe to lead compressed air to nozzle. In the first stage the helicopter carries the sand tank from the station/depot to the firing woods and starts bombarding the sand around and top of the fire and a second helicopter carries the water tank from the station to the top of the bombarded flames and starts spraying water before the flame starts again.

Abstract: A valve actuation mechanism has a plurality of links. Each link has a proximal end and distal end, and the links are disposed adjacent a valve member. The actuation mechanism also has at least one roller connected to the distal ends of at least two links. The roller contacts a surface of the valve member. In addition, at least one pivot for each link is present in the valve, wherein each pivot is positioned on the proximal end of each of the plurality of links.

Abstract: Disclosed is a fire extinguisher (100) comprising a fire extinguisher cylinder (10) for a fire-extinguishing agent. The fire extinguisher cylinder (10) comprises a mouth portion as an opening, a shoulder, a cylindrical body portion, and a bottom portion and is shaped with use of a resin provided with no joint. In addition, the body portion in the fire extinguisher cylinder (10) has a thickness from 1 mm to 5 mm, and a crystallinity of the resin is from 13% to 30% at the sites other than the mouth portion and the bottom portion. Accordingly, the fire extinguisher (100) is lightweight and does not rust. Further, the fire extinguisher (100) has high strength or high pressure resistance.

Abstract: A portable fire extinguishing apparatus, which comprises a casing (20) and a cartridge (3) arranged inside the casing (20). The top end of the cartridge (3) is fixedly connected with the casing (20) through a snap ring (24); the bottom of the cartridge (3) is fixedly connected with the casing (20) through some nuts and bolts; and an explosion venting unit (2) is arranged at the jet end of the cartridge (3). Kinetic energy generated from explosion is consumed through shifting and limiting processes of the explosion venting units (2), therefore recoil force or forward impact force generated after explosion of explosives can be consumed or released, so that safe and effective explosion venting is achieved and hurt to human bodies or articles after explosion of grains is avoided.

Abstract: A fire extinguisher is shown and described. The fire extinguisher may include a housing, a vessel positioned within the housing, the vessel retaining a fire suppression agent therein, and a discharge port positioned in the housing and operatively coupled with the vessel, where the fire suppression agent is capable of being expelled from the discharge port. The fire extinguisher may include an electrical connector positioned on the housing, the electrical connector capable of operatively securing to an electrical outlet, where the electrical connector is rotatable relative to the housing.

Abstract: The present invention relates to a novel hand-held aerosol fire suppression apparatus, comprising thermal insulating layer (3), inner cylinder (4), aerosol generating agent (5), heat insulating material (6), jet nozzle (9), tapered jet orifice (10), enclosure (11), ignition head (12) and piezoelectric crystal assembly (13), wherein the thermal insulating layer (3) is arranged between the inner cylinder (4) and the aerosol generating agent (5), and the jet nozzle (9) is screwed to the enclosure (11) by means of a thread structure that comprises 3˜6 thread segments. Compared to that in the prior art, with the segment thread design for screwing the jet nozzle to the enclosure, the time required for removing the jet nozzle can be reduced significantly, and therefore the apparatus in the present invention has much better safety feature against accidents.

Abstract: Compositions are described which are useful in many applications such as fire extinguishing or refrigeration. The compositions may include a hydrochlorofluorocarbon such as 2,2-dichloro-1,1,1-trifluoroethane, a dispersant such as CF3I, and an inert gas such as argon, and may in some embodiments be held under pressure. For example, some fire extinguishing compositions may be composed of 2,2-dichloro-1,1,1-trifluoroethane, CF3I, and argon.

Abstract: A compact device for ejecting a fluid including two chambers separated by a separating element of piston type. One of the chambers contains the fluid intended to be ejected, the other chamber is a pressurization chamber, the pressurization of which can cause translational movement of the separating element and ejection of the fluid. The pressurization chamber includes a thimble capable of sealably separating the inside of the pressurization chamber from the side walls of the reservoir. Thus, a seal between two chambers is perfect and durable without degrading slidability of the piston.

Abstract: A pressurized vessel including a pressurized vessel cylinder and dispersal unit. The pressurized vessel cylinder includes a non-circular cylindrical body and at least one truss structure connecting the first side of the body to the second side of the body, wherein the truss structure includes one or more voids such that fluid communication is maintained throughout the interior of the cylinder.

Abstract: Improvements to a portable fire extinguisher are disclosed. The improvements allow for frequent and simpler untrained and automatic self-servicing of a fire extinguisher. The improvements include an anti-bridging mechanism that can be articulated from the exterior of the chamber to fluff, mix or stir the powder within the chamber to keep it in a liquefied state. Additional improvements include a larger opening to more quickly fill and inspect the powder within the chamber. Another improvement includes the use of a CO2 canister located external to the chamber to allow easier servicing or replacement of just the CO2 canister as well as the ability to maintain the chamber in an un-pressurized condition, allows for non-HASMAT shipping. These features will extend the service intervals while maintaining the fire extinguisher in a ready condition.

Abstract: Method for monitoring the amount of liquid of an extinguishing liquid container (1) of a fire-fighting apparatus. The extinguishing liquid container (1) is filled with extinguishing liquid such that a predefined volume (6) remains unfilled, the extinguishing liquid container is pressurized with a gas, e.g.

Abstract: Methods and apparatus for passive non-electrical dual stage fire suppression according to various aspects of the present invention include detecting a fire with a first active fire suppressant unit and changing the status of a second fire suppressant unit from “stand-by” to “active” when the first fire suppressant unit releases a fire suppressant agent. After the first fire suppressant unit has released its fire suppressant agent, the second fire suppressant unit may detect a continued and/or a new fire and release a second fire suppressant agent in response to the detection.

Abstract: A fire suppression cylinder includes a valve at an outlet of a canister, and a control for the valve. The canister receives a liquid suppressor agent and a pressurized gas. A feature within a portion of the canister will receive the liquid suppressor agent. The feature increases the formation of gas bubbles within the liquid suppressor agent.

Abstract: An extinguisher for minimizing fires includes a container for holding an extinguishing fluid, a propellant disposed within the container for expelling the fluid from the container if desired, and a nozzle for directing the fluid towards a fire. The nozzle has an input for receiving the fluid from the container and an outlet for directing the fluid towards the fire. The nozzle includes an expansion chamber disposed between the input and the outlet of the nozzle. The nozzle outlet has a restrictor for restricting flow of the fluid from the expansion chamber.

Abstract: Compositions are described which are useful in many applications such as fire extinguishing or refrigeration. The compositions may include a hydrochlorofluorocarbon such as 2,2-dichloro-1,1,1-trifluoroethane, a dispersant such as CF3I, and an inert gas such as argon, and may in some embodiments be held under pressure. For example, some fire extinguishing compositions may be composed of 2,2-dichloro-1,1,1-trifluoroethane, CF3I, and argon.

Abstract: Improvements to a portable media delivery system are disclosed. The improvements allow for frequent and simpler untrained and automatic self-servicing of a media delivery system. The improvements include an anti-bridging mechanism that fluffs, mixes or stirs the powder within the chamber to keep it in a liquefied state. Additional improvements include a larger opening to more quickly fill and inspect the powder within the chamber. Another improvement includes the use of a gas or CO2 canister located external to the chamber or reservoir to allow easier servicing or replacement of just the CO2 canister as well as the ability to maintain the chamber in an un-pressurized condition, allows for non-HASMAT shipping. These features will extend the service intervals while maintaining the media delivery system in a ready condition.

Abstract: A combination of a liquid fire extinguishing composition including potassium salts or aluminum salts of an organic acid, resulting in a viscous liquid, is finely divided by a nozzle into droplets which may be applied to a fire or fuel therefor or form a cloud of droplets which settle onto such fire and/or fuel which is particularly effective for fighting fires where fuel is at least initially contained such as oil and grease fires in cooling utensils being heated on stoves. Propellant is contained and not entrained in the dispensed fire fighting composition to avoid at least spreading of the fuel beyond the containment.

Abstract: In-computer fire suppression, the computer comprising an in-computer flame detector and an in-computer fire extinguisher including detecting, by an in-computer flame detector, a flame, releasing, by the in-computer fire extinguisher, an extinguishing agent in response to the flame detector detecting the flame; and disabling the power supply to the computer having within it the in-computer flame detector and the in-computer fire extinguisher.

Abstract: In-computer fire suppression, the computer comprising an in-computer flame detector and an in-computer fire extinguisher including detecting, by an in-computer flame detector, a flame, releasing, by the in-computer fire extinguisher, an extinguishing agent in response to the flame detector detecting the flame; and disabling the power supply to the computer having within it the in-computer flame detector and the in-computer fire extinguisher.

Abstract: A hand-held aerosol fire suppression apparatus comprises an outer cylinder, inner cylinder components, a handle, and an activation device, wherein each outer cylinder is provided with at least three inner cylinder components. Compared with the prior art, the present invention has the following advantages: 1. the outer cylinder is provided with three or more inner cylinder components, so as to achieve a large ejecting area, a high fire suppression efficiency, and safety in use; 2. The members of the inner cylinder component are assembled together as one component, so as to achieve a convenient assembly and a high production efficiency.

Abstract: Compositions are described that may be used for applications such as a fire extinguishing composition in fire extinguishing unit, refrigeration, and the like. These compositions include halocarbons and additives that may stabilize the composition in the presence of a metal, water, and/or air. For example, the compositions may include a bromofluorocarbon, such as a bromofluoroalkene, an acid scavenger stabilizer, and an antioxidant stabilizer.

Abstract: For an automobile there is provided a fire extinguisher which is rapidly activatable in combination with a device for cutting a seatbelt and a device for breaking open a windshield.

Abstract: An automatic fire extinguisher includes a closed metal container with a top and upper portion in the shape of the frustum of a cone, a hemispherical shaped lower portion and a weighted bottom portion. The closed container includes a closeable opening for filling the container with the fire suppressant and a pressure valve for pressurizing the container after filling with suppressant. A quantity of fire suppressant is disposed in the container and dischargeable through a tubular member that extends through the top of the container and outwardly through a spray nozzle attached to the tubular member.

Abstract: The present disclosure provides for an advantageous extinguisher or discharge assembly. In exemplary embodiments, the present disclosure provides for an improved hydro-pneumatic fire extinguisher or discharge assembly. More particularly, the present disclosure provides for an improved hydro-pneumatic fire extinguisher or discharge assembly that is configured and dimensioned to fire or release a fire fighting agent (e.g., a fluid and/or liquid based fire fighting agent) while the extinguisher/assembly is oriented in any position or angle relative to gravity.

Abstract: The present disclosure provides for an advantageous extinguisher or discharge assembly. In exemplary embodiments, the present disclosure provides for an improved hydro-pneumatic fire extinguisher or discharge assembly. More particularly, the present disclosure provides for an improved hydro-pneumatic fire extinguisher or discharge assembly that is configured and dimensioned to fire or release a fire fighting agent (e.g., a fluid and/or liquid based fire fighting agent) while the extinguisher/assembly is oriented in any position or angle relative to gravity.

Abstract: The present invention relates to a novel hand-held aerosol fire suppression apparatus, comprising thermal insulating layer (3), inner cylinder (4), aerosol generating agent (5), heat insulating material (6), jet nozzle (9), tapered jet orifice (10), enclosure (11), ignition head (12) and piezoelectric crystal assembly (13), wherein the thermal insulating layer (3) is arranged between the inner cylinder (4) and the aerosol generating agent (5), and the jet nozzle (9) is screwed to the enclosure (11) by means of a thread structure that comprises 3˜6 thread segments. Compared to that in the prior art, with the segment thread design for screwing the jet nozzle to the enclosure, the time required for removing the jet nozzle can be reduced significantly, and therefore the apparatus in the present invention has much better safety feature against accidents.

Abstract: Methods and apparatus for fire egress/escape comprising a first container for storing a first fluid, a second container for storing a propellant, a nozzle to mix and atomize material from the first and second containers for forming a mist to suppress flame by evaporation, and an activation mechanism to enable a user to release material in the first and second containers for generating the mist.

Abstract: A fire suppression apparatus includes a canister containing a non-azide solid propellant chemical that generates an oxygen-displacing gas mixture when ignited; a pyrotechnic device associated with the canister for initiating ignition of the solid propellant chemical to generate the oxygen-displacing gas mixture; and at least one filter associated with the canister for filtering out contents of the oxygen-displacing gas mixture to result in a clean agent fire suppressant deliverable into a space. The fire suppression apparatus is preferably configured for use in fire suppression systems for normally occupied spaces.

Abstract: A foam generating, hand portable or handheld fire extinguisher contains a mixture of an aqueous film forming foam solution and vaporizing liquid gas under pressure of a relatively inert gas.

Abstract: The present invention relates to a hand-held aerosol fire suppression apparatus, comprising safety pole (1), button (2), enclosure of cartridge (4), enclosure of cooling layer (6), jet nozzle (8), tapered jet orifice (9), enclosure of apparatus (10), combustion chamber (11), rear fender (14), piezoelectric ceramics (15), rear cap (17) and safety ring (18); wherein the rear cap (17) is screwed to the enclosure of apparatus (10); the jet nozzle (8) is screwed or fitted to the enclosure of apparatus (10); a chemical agent (5) is installed in the enclosure of cartridge (4) and a cooling material (7) is installed in the enclosure of cooling layer (6) in the enclosure of apparatus (10); a thermal insulating layer (3) is installed between the enclosure of apparatus (10) and the enclosure of cartridge (4), between the enclosure of apparatus (10) and the enclosure of cooling layer (6), and between the rear fender (14) and the chemical agent (5); the combustion chamber (11) is installed between the enclosure of cartrid

Abstract: The present disclosure provides for an advantageous extinguisher or discharge assembly. In exemplary embodiments, the present disclosure provides for an improved hydro-pneumatic fire extinguisher or discharge assembly. More particularly, the present disclosure provides for an improved hydro-pneumatic fire extinguisher or discharge assembly that is configured and dimensioned to fire or release a fire fighting agent (e.g., a fluid and/or liquid based fire fighting agent) while the extinguisher/assembly is oriented in any position or angle relative to gravity.

Abstract: A fire extinguisher comprises an elongated tube. The elongated tube has a pressure-tight, thermoplastic exterior tubular wall and an axially parallel, flame resistant inner wall. The inner tubular wall defines a chamber and the wall has ports through the wall at regular intervals along the length and around the circumference providing fluid communication between the chamber and the exterior tubular wall for a quantity of fire extinguishing fluid under pressure in the chamber. The thermoplastic exterior wall ruptures on contact with flame. The inner tubular wall remains intact and fire extinguishing agent discharges through the ports to extinguish the fire. The apparatus is actuated by contact with flame and requires no actuation by the vehicle crew.

Abstract: Compositions are described which are useful in many applications such as fire extinguishing or refrigeration. The compositions may include a hydrochlorofluorocarbon such as 2,2-dichloro-1,1,1-trifluoroethane, a dispersant such as CF3I, and an inert gas such as argon, and may in some embodiments be held under pressure. For example, some fire extinguishing compositions may be composed of 2,2-dichloro-1,1,1-trifluoroethane, CF3I, and argon.

Abstract: A fire extinguisher (50, 50?, 50?) comprises a container (10, 10?) that holds a fire-extinguishing substance and that has a container jacket (12, 12?) closed at both ends, and a piston (20, 20?) which is axially displaceable in the container jacket and which separates a space (22, 22?) for fire-extinguishing substance from an expansion space (24, 24?) in the container. According to the invention, an inner compressed-gas chamber (26, 26?) provided in the container (10, 10?) is spatially separate from the expansion space and serves for controlled pressurizing of the expansion space (24, 24?). The piston (20, 20?) is arranged such that it can be displaced along the compressed-gas chamber (26, 26?).

Abstract: Compositions are described which are useful in many applications such as fire extinguishing or refrigeration. The compositions may include a hydrochlorofluorocarbon such as 2,2-dichloro-1,1,1-trifluoroethane, a dispersant such as CF3I, and an inert gas such as argon, and may in some embodiments be held under pressure. For example, some fire extinguishing compositions may be composed of 2,2-dichloro-1,1,1-trifluoroethane, CF3I, and argon.

Abstract: The invention relates to a device for extinguishing a fire which is suitable for carrying and handling by persons. The device includes a pressureless container for placing an extinguishing agent in solid form, an ignition member to ignite the extinguishing agent forming aerosol during extinguishing operations, a discharge member for discharge of the aerosol in a directed jet or plume, a handling member for handling of the device by a user, and a communication member for remote communication.

Abstract: The invention relates to a fire protection installation (30) comprising a mist sprayer system with at least one nozzle (5, 10) through which extinguishing medium in the form of liquid is arranged to be sprayed out at high pressure, so that a mist is created for achieving fire extinguishing by means of cooling of combustion gases and the seat of the fire. The distinguishing characteristics are that the fire protection installation is portable and has a modular construction comprising a basic system (31) and a number of customized additional systems, which additional systems comprise different additional units that are adapted to a particular function profile that is set in the actual fire protection installation.

Abstract: One embodiment of the invention is a hand-held fire extinguisher including: a tube having an open outlet end, an outer surface, and an inner surface; a fire suppressant composition provided within the tube; a propellant source containing a propellant, having a propellant outlet, where the propellant outlet is distal from the open outlet end of the tube and from the fire suppressant composition, and where the propellant outlet is in fluid communication with the fire suppressant composition and the open outlet end of the tube; and an actuator for the propellant source. In such apparatus, actuation of the actuator allows propellant flow from the propellant outlet passing through the fire suppressant composition and out through the open outlet end of the tube.

Abstract: Improvements to a portable fire extinguisher are disclosed. The improvements allow for frequent and simpler untrained and automatic self-servicing of a fire extinguisher. The improvements include an anti-bridging mechanism that can be articulated from the exterior of the chamber to fluff, mix or stir the powder within the chamber to keep it in a liquefied state. Additional improvements include a larger opening to more quickly fill and inspect the powder within the chamber. Another improvement includes the use of a CO2 canister located external to the chamber to allow easier servicing or replacement of just the CO2 canister as well as the ability to maintain the chamber in an un-pressurized condition, allows for non-HASMAT shipping. These features will extend the service intervals while maintaining the fire extinguisher in a ready condition.