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US 6,810,964 B1Granted
Pressurization system for fire extinguishers
AssigneeGeneral Dynamics OTS (Aerospace), Inc.
InventorNicholas R. Arnot
Life of this patent
Estimating the term…
Abstract
A fire extinguisher includes a gas generator for pressurizing a suppressant. The generator includes an ignition cord within a flexible tube extending within an interior of an extinguisher bottle. Advantageously, there is additional generant between the tube and the ignition cord. The extinguisher may be manufactured as a retrofit of an existing hand-held supercharged extinguisher.
Claims19
A fire extinguisher comprising:
- a bottle having an interior and at least an outlet;
- a fire suppressant contained by the bottle when the extinguisher is in a pre-discharge condition;
- and
- a gas generant and discharge assembly extending through the bottle outlet and secured there to and comprising:
- a source of gas for pressurizing the suppressant at least when the bottle is in a discharging condition comprising:
- an ignition cord having a sheath and a pyrotechnic charge contained within the sheath and extending from a proximal end to a distal end;
- a flexible tube surrounding the sheath at least along a major portion of a length thereof and extending from a proximal end to a distal end;
- a gas generant charge contained between the tube and sheath;
- and means for igniting the ignition cord;
- and
- an outlet, through which the suppressant is discharged when the extinguisher is in the discharging condition.
8 more elements
A fire extinguisher comprising:
- a bottle having an interior and at least an outlet;
- a fire suppressant contained by the bottle when the extinguisher is in a pre-discharge condition;
- and
- a gas generant and discharge assembly extending through the bottle outlet and secured there to and comprising:
- a source of gas for pressurizing the suppressant at least when the bottle is in a discharging condition comprising:
- an ignition cord having a sheath and a pyrotechnic charge contained within the sheath and extending from a proximal end to a distal end;
- a flexible tube surrounding the sheath at least along a major portion of a length thereof and extending from a proximal end to a distal end;
- a gas generant charge contained between the tube and sheath;
- a percussion primer having a primer charge and an operative end in close facing relationship to the proximal end of the ignition cord effective to ignite the ignition cord;
- a first handle portion positioned to be gripped by the fingers of a user's hand and a second handle portion positioned to be simultaneously engaged by a palm of said hand and mounted to be shifted toward the first handle portion responsive to a compressive force applied by the hand;
- firing pin mechanism mounted for spring-biased movement between an initial position and second position in which an operative end portion of the firing pin mechanism contacts the percussion primer with effective momentum to trigger the primer;
- and
- an outlet, through which the suppressant is discharged when the extinguisher is in the discharging condition.
10 more elements
A fire extinguisher comprising:
- a bottle having an interior and at least an outlet;
- a fire suppressant contained by the bottle when the extinguisher is in a pre-discharge condition, wherein the suppressant comprises 2-3 pounds of dodecafluoro-2-methylpentan-3-one;
- and
- a gas generant and discharge assembly extending through the bottle outlet and secured there to and comprising:
- a source of gas for pressurizing the suppressant at least when the bottle is in a discharging condition comprising:
- an ignition cord having a sheath and a pyrotechnic charge contained within the sheath and extending from a proximal end to a distal end;
- a flexible tube surrounding the sheath at least along a major portion of a length thereof and extending from a proximal end to a distal end;
- a gas generant charge contained between the tube and sheath;
- and means for igniting the ignition cord;
- and
- an outlet, through which the suppressant is discharged when the extinguisher is in the discharging condition.
8 more elements
Dependencies are inferred from the claim text.