Improvements to a portable fire extinguisher are disclosed. The improvements allow for frequent and simplified inspection and maintenance of a fire extinguisher with minimal training and without need for custom equipment. 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 CO.sub.2 cartridge located external to the chamber to allow easier servicing or replacement of just the CO.sub.2 cartridge 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.

Improvements to a portable fire extinguisher are disclosed. The improvements allow for frequent and simplified inspection and maintenance of a fire extinguisher with minimal training and without need for custom equipment. 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 CO.sub.2 cartridge located external to the chamber to allow easier servicing or replacement of just the CO.sub.2 cartridge 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.

A method of actuating an extinguisher system may comprise retaining a broadhead cutter in close proximity to a burst disc surface, receiving an impulse signal, actuating a spring release mechanism in response to receiving the impulse signal, driving a cutter shaft towards the burst disc surface in response to actuation, and piercing the burst disc surface via the broadhead cutter coupled to the cutter shaft.

A method of actuating an extinguisher system may comprise retaining a broadhead cutter in close proximity to a burst disc surface, receiving an impulse signal, actuating a spring release mechanism in response to receiving the impulse signal, driving a cutter shaft towards the burst disc surface in response to actuation, and piercing the burst disc surface via the broadhead cutter coupled to the cutter shaft.

A fire extinguisher includes a barrel having a chamber with an opening covered by an upper cover that includes a guide-out passage having a tubular portion with a guide-in groove and an inlet. A guide-out groove is defined above a sealing edge and extends to the outside. A gas inlet unit is mounted to the upper cover and is connected to a high pressure steel bottle. A high pressure gas in the high pressure steel bottle can flow through a gas inlet passage into the chamber. A guide-out unit includes a guiding tube unit connected to the tubular portion and a valve connected to the guiding tube unit. The valve is opened when subjected to a pressure from the high pressure steel bottle. A piston valve normally and sealingly abutting a sealing edge of the tubular portion can be moved to a position in sealing contact with the sealing edge.

A fire extinguisher includes a barrel having a chamber with an opening covered by an upper cover that includes a guide-out passage having a tubular portion with a guide-in groove and an inlet. A guide-out groove is defined above a sealing edge and extends to the outside. A gas inlet unit is mounted to the upper cover and is connected to a high pressure steel bottle. A high pressure gas in the high pressure steel bottle can flow through a gas inlet passage into the chamber. A guide-out unit includes a guiding tube unit connected to the tubular portion and a valve connected to the guiding tube unit. The valve is opened when subjected to a pressure from the high pressure steel bottle. A piston valve normally and sealingly abutting a sealing edge of the tubular portion can be moved to a position in sealing contact with the sealing edge.

A fire extinguisher includes a barrel having a chamber with an opening covered by an upper cover that includes a guide-out passage having a tubular portion with a guide-in groove and an inlet. A guide-out groove is defined above a sealing edge and extends to the outside. A gas inlet unit is mounted to the upper cover and is connected to a high pressure steel bottle. A high pressure gas in the high pressure steel bottle can flow through a gas inlet passage into the chamber. A guide-out unit includes a guiding tube unit connected to the tubular portion and a valve connected to the guiding tube unit. The valve is opened when subjected to a pressure from the high pressure steel bottle. A piston valve normally and sealingly abutting a sealing edge of the tubular portion can be moved to a position in sealing contact with the sealing edge.

A fire extinguisher includes a barrel having a chamber with an opening covered by an upper cover that includes a guide-out passage having a tubular portion with a guide-in groove and an inlet. A guide-out groove is defined above a sealing edge and extends to the outside. A gas inlet unit is mounted to the upper cover and is connected to a high pressure steel bottle. A high pressure gas in the high pressure steel bottle can flow through a gas inlet passage into the chamber. A guide-out unit includes a guiding tube unit connected to the tubular portion and a valve connected to the guiding tube unit. The valve is opened when subjected to a pressure from the high pressure steel bottle. A piston valve normally and sealingly abutting a sealing edge of the tubular portion can be moved to a position in sealing contact with the sealing edge.

The present disclosure relates to a broadhead cutter activation mechanism and system inside of a fire extinguisher. The broadhead cutter device may be attached to a cutter shaft which is driven downward when the elastic potential energy is released form a spring system. The broadhead cutter device may be configured to pierce and open a burst disc to release the flow of an extinguishing agent under pressure.

The present disclosure relates to a broadhead cutter activation mechanism and system inside of a fire extinguisher. The broadhead cutter device may be attached to a cutter shaft which is driven downward when the elastic potential energy is released form a spring system. The broadhead cutter device may be configured to pierce and open a burst disc to release the flow of an extinguishing agent under pressure.