Pneumatic puncture device for aircraft fire suppression systems
First Claim
1. A fire suppression device for dispensing a fire retardant foam into an aircraft cargo compartment, comprising:
- a housing including a piston chamber, a gas inlet for connection to a source of pressurized gas, a gas flow passage for connecting the gas inlet to an extend side of the piston chamber, and a foaming agent inlet for connection to a source of a foaming agent;
a plunger including a piston movable in the piston chamber between a retracted position and an extended position when pressurized gas is supplied to the extend side of the piston chamber via the gas inlet and gas flow passage; and
a foaming chamber a discharge opening through which fire retardant foam is dispensed from the foaming chamber, the foaming chamber being connected at its inlet end by an inlet passage that communicates with the foaming agent inlet when the plunger is in its extended position.
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Accused Products
Abstract
A fire suppression device characterized by a plunger that is extendible from a housing for delivery of a fire suppressant foam. The plunger may be equipped at its outer end with a puncture tip that can penetrate through the wall of a container or cargo cover for delivery of the fire suppressant foam directly to the cargo, preferably after full or almost full extension of the plunger. The plunger may be driven outwardly under high force by a pressurized gas that may also be used as a propellant for mixing with a liquid foaming agent, preferably within a foaming chamber carried by the piston. Provision may also be made for connection to a source of pressurized fluid to effect retraction of the plunger.
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Citations
20 Claims
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1. A fire suppression device for dispensing a fire retardant foam into an aircraft cargo compartment, comprising:
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a housing including a piston chamber, a gas inlet for connection to a source of pressurized gas, a gas flow passage for connecting the gas inlet to an extend side of the piston chamber, and a foaming agent inlet for connection to a source of a foaming agent;
a plunger including a piston movable in the piston chamber between a retracted position and an extended position when pressurized gas is supplied to the extend side of the piston chamber via the gas inlet and gas flow passage; and
a foaming chamber a discharge opening through which fire retardant foam is dispensed from the foaming chamber, the foaming chamber being connected at its inlet end by an inlet passage that communicates with the foaming agent inlet when the plunger is in its extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17)
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11. A fire suppression device for an aircraft cargo compartment fire suppression system, comprising:
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a housing including a piston chamber, a gas inlet for connection to a source of pressurized gas, a gas flow passage for connecting the gas inlet to an extend side of the piston chamber, and a foaming agent inlet for connection to a source of a foaming agent; and
a plunger including a piston movable in the piston chamber between a retracted position and an extended position when pressurized gas is supplied to the extend side of the piston chamber via the gas inlet and gas flow passage, the plunger being configured to receive therein a cartridge including a foaming chamber, and the plunger including foaming agent flow passage communicating with the foaming agent inlet when the plunger is in its extended position. - View Dependent Claims (12, 13, 14, 15, 16)
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18. A method of operating a fire suppression device for dispensing a fire retardant foam into an aircraft cargo compartment, comprising the steps of:
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using a pressurized gas to extend a plunger from a housing under sufficient force to allow a puncture tip at the end of the plunger to penetrate a container wall or cargo cover; and
automatically dispensing from a discharge end of a foaming chamber a fire retardant foam upon the plunger reaching an extended position. - View Dependent Claims (19, 20)
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Specification