Abstract: A composite fracturing tree includes an operating valve and a master valve in fluid communication with the operating valve. The master valve includes an inlet portion in fluid communication with the operating valve, an outlet portion, and a gate portion. The gate portion is disposed between the inlet portion and the outlet portion. The gate portion is moveable between a flow position and an occluding position. In the flow position, the gate portion permits flow between the inlet portion and the outlet portion. In the occluding position, the gate portion prevents flow from the inlet portion to the outlet portion. The gate portion is actuated from the flow position to the occluding position with a closing force and from the occluding position to the flow position with an opening force. The master valve allows for the closing force to reduced compared to conventional fracturing valves.

Abstract: In one or more arrangements, a system is presented for preventing the spread of fire through a conveyor opening in a fire wall. In one or more arrangements, a fire door system is connected to the fire wall and/or conveyor proximate to the conveyor opening. The fire door system includes a door assembly, a door frame assembly, and an actuator. The door frame assembly is connected to the fire wall, covers portions of the opening below the conveyor and between belts of the conveyor, and forms a door opening above the conveyor. The door assembly is configured to move between a closed position, where door assembly covers the door opening, and an open position, where the door assembly at least partially uncovers the door opening. The actuator is configured to cause the door to be moved to the closed position in response to fire.

Abstract: Fire fighting system with a first feed platform arranged for feeding a pipe system having extinguishing nozzles with extinguishing fluid comprising a first sub-system with a first extinguishing fluid reservoir, at least two first propellant gas reservoirs, and a first control circuit, wherein the first propellant gas reservoirs each have a valve for pneumatically coupling the respective first propellant gas reservoir to the extinguishing fluid reservoir and the respective valves can be pneumatically activated in each case via an outlet of the respective other valve, a second sub-system having a second extinguishing fluid reservoir, at least two second propellant gas reservoirs and a second control circuit, the second propellant gas reservoirs each having a valve for pneumatically coupling the respective second propellant gas reservoir to the extinguishing fluid reservoir, and the respective valves being activatable pneumatically in each case via an outlet of the respective other valve, characterized in that t

Abstract: The invention relates to a die assembly for a pelletizing apparatus, the die assembly having a pressure regulating device that has a base member, a flow channel, and an annular channel. The base member has a fluid inlet side and a fluid outlet side. The flow channel is formed in the base member to provide a fluid-conducting connection between the fluid inlet side and the fluid outlet side. The annular channel section is connected to the flow channel in a fluid-conducting manner and formed in the region of the fluid outlet side. The invention is characterized by a flow cross-section regulating element for influencing a flow cross-section of the annular channel section. The regulating element is movable relative to the annular channel section and/or the flow channel.

Abstract: An actuator for opening a hermetically sealed cylinder is disclosed herein. The actuator includes an actuation chamber configured to receive pressurized gas, the actuation chamber at least partially defined by a top wall and a bottom wall, a cutter body disposed within the actuation chamber between the top wall and the bottom wall, the cutter body including a top portion and a bottom portion, a cutting edge extending from the bottom portion of the cutter body, and a spring disposed between the top portion of the cutter body and the bottom wall of the actuation chamber.

Abstract: An initiator for a gas generator of a vehicle safety device includes a cup defining an interior, a primary pyrotechnic material disposed in a primary combustion chamber in the interior of the cup, and a pair of electrical pins in reaction initiating communication with the primary pyrotechnic material through a bridge wire. The bridge wire is in reaction initiating contact with the primary pyrotechnic material at a first end of the primary pyrotechnic material. The primary pyrotechnic material is compacted within the primary combustion chamber to include a depression at a second end of the primary pyrotechnic material, the second end opposite the first end.

Abstract: A method of sequencing a pyrotechnic system includes igniting at least one of a first energetic coupled to a first inlet of a one way sequence termination arrangement, and a second energetic coupled to a second inlet of the one way sequence termination arrangement, fluidically coupling the first inlet to an outlet of the one way sequence termination arrangement in response to the second energetic being ignited before the first energetic is ignited, and blocking fluidic coupling between the second inlet and the outlet in response to the first energetic being ignited before the second energetic is ignited.

Abstract: A liquid reserve battery including: a collapsible storage unit having a liquid electrolyte stored therein; a battery cell having an inlet in communication with an outlet of the collapsible storage unit, the battery cell having gaps dispersed therein; a first pyrotechnic material disposed adjacent the collapsible storage unit such that initiation of the first pyrotechnic material provides pressure to collapse the collapsible storage unit to heat and force the liquid electrolyte through the outlet and into the gaps; and one or more heat exchangers disposed between the outlet of the collapsible storage unit and the inlet of the battery cell.

Abstract: A valve arrangement includes a housing with an outlet and an inlet and having a poppet. The poppet has a stem and is movable within the housing along a movement axis between an open position and a closed position. The inlet is isolated from the outlet when the poppet is in the closed position. The inlet is in fluid communication with the outlet when the poppet is in the open position. The stem is inverted relative to the housing such that at least a portion of the poppet stem is disposed in the inlet when the poppet is in the open position.

Abstract: An example unit load device inerting system includes a nitrogen generation system, a first conduit coupled to the nitrogen generation system to carry nitrogen, an inlet located downstream of the first conduit and attached to a unit load device to deliver the nitrogen into the unit load device, an outlet attached to the unit load device, and a second conduit coupled to the outlet to carry gas out of the unit load device. An example method includes flowing nitrogen through a first conduit from a nitrogen generation system to an inlet located downstream of the first conduit and the inlet is attached to a unit load device to deliver the nitrogen into the unit load device, and venting the unit load device to transport gas out of the unit load device through a second conduit coupled to an outlet configured to be attached to the unit load device.

Abstract: 1. Technical effect Increasing the quick action, efficiency and reliability of currently available explosion protection systems. 2. Essence of application The proposed explosion protection system contains an explosion detector and a shock wave damping agent discharge device. The detector consists of overpressure and flame sensors, an identification module and an electromagnetic signal wireless transmitter. The discharge device contains a container filled with damping agent. 3. Field of use Protection of infrastructural and industrial facilities from non-authorized and, terrorist explosions; localization of methane explosion energy in coal mines.

Abstract: Safety valves accurately control closure and opening of fluid passage through the valve. Valves include a barrier that blocks the fluid until removal only by a high-energy projectile. Following removal and opening, the barrier or the projectile can flow through the valve, which remains open. Bullets, pneumatic pistons, shot, coilgun pellets and any other forceful projectile may impact and remove the barrier. The projectile is actuated with any type of chemical reaction, firing pin, spring release, accelerating circuit, ignition circuit. Catchers in the valve envelop or otherwise retain the projectile or barrier pieces and enter the fluid flow of the opened valve without blocking it. Disruptable barriers include strong but breakable glass plates, thin steel sheets, a rotatable door and other barriers that can withstand potentially over 10,000 psi of fluid pressure while closing the valve. Valves can use circuits to both monitor valve open/closed status and initiate firing the projectile.

Abstract: A breakaway coupling includes a body and a valve assembly inside the body. The body includes a fluid conduit and a shear groove between first and second portions. The shear groove is designed to crack, break, or separate under certain conditions. The valve assembly is designed to shut off fluid flow through the fluid conduit when the shear groove cracks, breaks, or separates. The valve assembly includes a valve seat, a sealing element, one or more pins, and a biasing member. The one or more pins hold the sealing element in an open position while the shear groove is in tack, and allow the sealing element to move to a closed position (with the help of the biasing member) in the event the shear groove cracks, breaks, or separates.

Abstract: A high flow rate inflator intended to be threaded into or onto the threaded neck of a conventional gas cylinder. The inflator comprises a spring-loaded ballasted firing pin that is retained in a cocked position by a tethered trigger pin. Upon firing by pulling on the trigger pin, the firing pin forcibly moves into engagement with a power primer mounted with a power primer holder to ignite the same, whereupon the ignition gases forcibly drives a hollow larger diameter pierce pin mounted within an interior cylinder into the frangible seal of the gas cartridge to cut a large-bore hole therethrough and allow gas escaping from the gas cylinder to flow at a high rate through the inflator into an inflatable device.

Abstract: A multi-barrier seal system, including, a first seal assembly configured to provide a first sealing barrier between an auxiliary line and a mineral extraction system, and a second seal assembly configured to provide a second sealing barrier between the auxiliary line and the mineral extraction system, wherein the second seal assembly is configured to shear through the auxiliary line.

Abstract: A perforating gun technique. The technique includes perforating with the gun in a manner that deforms internal support structure thereof. Thus, follow-on treatment with a breakup fluid tailored to the material of the support structure may be utilized to dissolve the structure. The carrier of the gun which houses the structure may then be utilized as a conduit for fluid flow.

Abstract: A system for use with a well can include a perforating assembly with at least one perforator, the perforating assembly conveyed through a wellbore with fluid flow through the wellbore, and plugging devices spaced apart from the perforating assembly in the wellbore, the plugging devices conveyed through the wellbore with the fluid flow. A method of deploying plugging devices in a wellbore can include conveying a perforating assembly including a dispensing tool through the wellbore, the dispensing tool including a container, and then releasing the plugging devices from the container into the wellbore at a downhole location. Another method of deploying plugging devices in a wellbore can include conveying the plugging devices through the wellbore with fluid flow through the wellbore, and conveying a perforating assembly through the wellbore while the plugging devices are being conveyed through the wellbore.

Abstract: 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.

Abstract: The invention relates to a combustion chamber (10) comprising an opening device for a compressed gas tank (21) of a hybrid inflator (20), wherein the combustion chamber (30) comprises a sleeve-type combustion chamber sidewall (34) confining a combustion chamber interior (31) and a combustion chamber bottom (10), wherein the opening device is arranged on a surface (11) of the combustion chamber bottom (10) facing away from the combustion chamber interior (31) and faces away from the combustion chamber interior (31). In accordance with the invention, the combustion chamber bottom (10) is tightly connected to the combustion chamber sidewall (34) so that in the case of operation the combustion chamber bottom (10) is bendable.

Abstract: A method of releasing plugging devices into a wellbore can include conveying a dispensing tool to a desired downhole location in the wellbore, the dispensing tool including a container, and then releasing the plugging devices from the container into the wellbore at the downhole location. A plugging device dispensing system for use with a subterranean well can include a dispensing tool having a container configured for containing multiple plugging devices, and an actuator operable to release the plugging devices from the container at a downhole location in the well.

Abstract: A valve assembly includes an inlet and an outlet, which open into a working chamber of the valve assembly, and an actuator. In a non-actuated state of the actuator, a flow passage between the inlet and the outlet is blocked. The actuator is optionally a shape-memory actuator that can be actuated one time or comprises a shape-memory actuator, which suddenly changes its external shape upon reaching a conversion temperature, which is dependent on the alloy composition thereof, and which can be generated by a controllable electrical heating device of the valve assembly. The actuator irreversibly destroys a pipe element separating the inlet from the outlet in the working chamber upon actuation, whereby the inlet and the outlet are connected to one another with respect to flow via the working chamber.

Abstract: The present invention provides a gas generator, including a cylindrical housing having therein an ignition device chamber and a pressurized gas chamber, a closing member in a circular shape having a fragile portion provided on one surface and closing between the chambers, a piston being disposed inside the ignition device chamber and having a base plate and a rod that extends in the axial direction from one surface of the base plate to abut against or face the closing member, the fragile portion being a groove formed with a curve extending from a start point A on Y1 to an end point E through a first intermediate point B on Y2, a second intermediate point C on Y1, and a third intermediate point D on Y2, where Y1 and Y2 are two straight lines drawn to be orthogonal to each other and to pass through a crossing point X2 on one surface of the closing member, the groove formed so that distances from the crossing point X2 to the respective points satisfy the following relationship: the distance to the start point

Abstract: The present invention relates to a downhole safety device (1) for a downhole tool (2) for controlling a delivery of electricity from a power device to an electrical component in the tool, comprising a first member (3) comprising a plurality of conductors (4) and a second member (6) comprising a plurality of conductors (7). Furthermore, the invention relates to a method for activating the safety device.

Abstract: A pyrotechnic pretensioner (10) for a safety system in a vehicle has an inflator (22) including a propelling charge (26) and an igniter (32) and including a housing (12) in which a pressure chamber (14) is provided into which gas can flow and in which a piston can be displaced by the gas, an end piece (16) which closes the pressure chamber (14) and in which a chamber (24) is formed into which the propelling charge (26) is filled and whose wall constitutes the wall of the propellant is provided on the housing (12).

Abstract: A valve mechanism is herein described that utilizes a frangible plug. The valve mechanism comprises a valve body having an inlet port and an outlet port and a passageway extending therebetween. The valve mechanism comprises a frangible plug that is held within the valve body to block the passageway when the plug is intact. The plug comprises a predefined fracture plane and is configured to fracture across the predefined fracture plane upon application of an impact force.

Abstract: A device (1) for draining a tank of fluid under pressure pertaining to a space system includes a pyrotechnic actuator that is suitable to perforate a conduit (2) in fluid communication with the tank, the device including a collar (4) that is suitable to enclose the conduit, the collar bearing: a pyrotechnic cartridge (5) for perforation, oriented radially towards the conduit (2), and an anvil (11), diametrically opposed to the cartridge in relation to the conduit, that is suitable to collect debris generated by the perforation.

Abstract: A locking poppet valve that is reusable and can be pyrotechnically actuated includes an actuating mechanism and a valve assembly that are in fluid communication. A fluid channel traverses through a valve body and fluidly connects the actuating mechanism to a poppet valve positioned within the valve body. When the actuating mechanism is fired, a piston is displaced within an actuator housing, which in turn displaces hydraulic fluid within the actuator housing and the fluid channel. The displaced hydraulic fluid acts to push a valve spool along a valve stem, opening the poppet valve and allowing fluid to flow through the valve body. Additionally, the piston is held in a fired position by a locking mechanism, such that the poppet valve remains open. The poppet valve can be reset by disengaging the locking mechanism and allowing the hydraulic fluid to re-displace within the fluid channel and the actuator housing.

Abstract: Apparatus, methods and systems for inspecting and/or sensing defects in a thermal pressure relief device. The thermal pressure relief apparatus may comprise a bulb having a fluid therein. In some implementations, a sensor may be used to determine whether the fluid within the bulb exceeds a fill level threshold. Upon determining that the fluid is below the fill level threshold, an action may be taken. In some implementations, the action may comprise providing a notification.

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: A high speed valve has a valve body having a flow passage therethrough, and a poppet disposed within the valve body. The poppet is movable between a first position in which the poppet blocks the flow passage and a second position, and the poppet has a piston connected to a stem at a proximal end of the stem. The valve also has a rotating lever release mechanism adjacent a distal end of the stem.

Abstract: A valve actuation mechanism for a high rate discharge valve has a collet with fingers adjacent a valve member that provides restraint against displacement of the valve member at angularly spaced locations symmetrical about the axis of the valve member. Each collet finger has at least one projection adjacent a first end. The valve actuation mechanism also has a collet sleeve release mechanism with a main body portion having a first end and a second end. The main body portion contains an aperture with at least one land portion that secures each projection of the collet fingers. The main body portion also has an actuation pad at the second end, as well as a hinge mechanism for allowing rotational movement of the main body portion connected to the first end of the main body portion, and an actuation device that contacts the actuation pad.

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: A shutoff fitting as protection device for blocking a fluid flow through a conduit includes a pneumatic adjustment device, and a hybrid gas generator operably connected to the adjustment device. The hybrid gas generator has a reaction chamber with a gas generator and a pressure gas chamber containing compressed gas and arranged adjacent to the reaction chamber. An inlet diaphragm separates the reaction chamber from the pressure gas chamber and can be penetrated, when the gas generator is activated, so that a passage is established from the reaction chamber to the pressure gas chamber. An outlet diaphragm closes the pressure gas chamber and is rendered ineffective through destruction when the gas generator is activated to enable compressed gas to flow into the adjustment device.

Abstract: Embodiments of a solid propellant rocket motor are provided. In one embodiment, the solid propellant rocket motor includes a pressure vessel having a cavity therein, a solid propellant disposed within the cavity, a nozzle fluidly coupled to the cavity, and a tungsten alloy burst disc positioned proximate the nozzle. The tungsten alloy burst disc is configured to block gas flow through the nozzle when the tungsten alloy burst disc is intact and to fragment at a predetermined burst pressure. Embodiments of a method are further provided for manufacturing a burst disc. In one embodiment, the method comprises the step of forming a burst disc from a tungsten alloy. Embodiments of a burst disc are still further provided. In one embodiment, the burst disc includes an outer annular portion, and a central portion comprising a tungsten alloy.

Abstract: A relief valve is provided and may include a housing having a first inlet port and a second inlet port. An initiator may be disposed within the housing and an engagement member may be slideably disposed within the housing and may be moveable between a retracted position and an extended position under force of the initiator. The engagement member may include a first bore aligned with the first inlet port in the extended position and a second bore aligned with the second inlet port in the extended position.

Abstract: An occupant protection device includes (i) an electronic control unit having a control board, (ii) a parallel connection bus having two lines, (iii) multiple satellite sensors connected to the parallel connection bus, (iv) a squib connected to the parallel connection bus, and (v) an accident prevention diode located close to the squib. The control board includes an interface and a processor. Each of the satellite sensors includes a distributed system interface which is located between the two lines. The parallel connection bus is supplied with a sensor drive voltage. The electronic control unit starts to operate at least one of the occupant protection portions based on a result of the collision determination by the control board.

Abstract: A valve release mechanism has an actuator, a ring, a plurality of ball bearings, and a retainer. The retainer is positioned adjacent an inner diameter of the ring and has a plurality of circumferentially spaced holes therein. Each circumferentially spaced hole receives one of the plurality of ball bearings, which are movable therein. The ring has channels and lands along its inner diameter that allow the ball bearings to move varying distances relative to the retainer. The lands contact the ball bearings when the ring is in a first position and the channels receive the ball bearings when the ring is in a second position. The poppet has a groove that is vertically aligned with circumferentially spaced holes in the retainer when the poppet is in a first closed position. The ball bearings are pressed into the groove in the poppet by the lands of the ring. The resulting interference of the ball bearings with poppet locks the poppet in the first closed position.

Abstract: A pyrotechnic drive unit includes a cylinder tube (12) having an axial end (28), a piston (14) guided in the cylinder tube (12), a pyrotechnic igniter (16) which is adjacent to the piston (14) and constitutes the pyrotechnic drive, and a plastic part (18). The plastic part (18) is injection-molded to the igniter (16) and to the axial end (28) of the cylinder tube (12) so that it fastens the igniter (16) to the cylinder tube (12) and tightly closes the axial end (28) of the cylinder tube (12), the plastic part (18) engaging the piston (14) in an initial position of the drive unit (10).

Abstract: Blowout preventer blocks, each having a channel and plate(s) to close it. The blocks are placed over a pipe through which oil or other fluid is escaping, so that the pipe is in their channels. Alongside the channel in each block are one or more plates, having diameters somewhat larger than the diameter of the channel. Explosive charges propel the plates into the channel to seal it off and stop the leak. When multiple blocks and/or multiple plates in a block are placed over a pipe, the assembly may be referred to as a “Christmas tree.” There are passages that allow the plates to move into place to block the channel. Leading edges of the plates act as male elements that engage female reciprocal ends of the passages to create a seal. Grooves and tunnels in the plates allow fluid to escape into the pipe to ensure a seal.

Abstract: Systems, methods and apparatus are provided through which in some embodiments a non-pyrotechnic valve includes an inlet piece, an actuator comprising a shape-memory metal, and an outlet attached to the inlet piece. In some examples, the shape-memory metal includes Nitinol.

Abstract: A flow control valve including, a tubular housing having a valve port, a piston disposed in the tubular housing having an orifice, the piston being slidable in the tubular housing to align the orifice with the valve port, a combustion portion at least partially defined by the tubular housing and the piston, and a propellant disposed in the combustion portion and method.

Abstract: A blowout preventer with a block having a channel and one or more plates to close the channel. The block is placed over a pipe through which oil or other fluid is escaping, so that the pipe is in the channel. Alongside the channel are one or more circular plates, having diameters somewhat larger than the diameter of the channel. Explosive charges propel the plates into the channel to seal it off and stop the leak. The explosive charges may be ignited by radio, electric or sonic signals or other suitable means. There are passages for the plates that are orthogonal to the cylindrical channel, that allow the plates to move into place to block the channel, while preventing them from moving too far and overshooting the channel. Ratchets keep the plates from moving back after they have blocked the channel. Vents allow gas from the explosive charges to escape.

Abstract: A gas generating system incorporating a gas flow control mechanism including opposed wall portions defining a cavity for slidably receiving a support member therein. A gas exit passage is exterior of the cavity and in fluid communication with the cavity. An opening in one wall portion enables fluid flow into the cavity. An opening in another wall portion enables a fluid flow from the cavity into the gas exit passage. A seal prevents fluid flow into the cavity when the seal is supported against a force exerted by the fluid. A support member slidably received within the cavity supports the seal against the fluid force. A mechanism is provided for moving the support member from a first position supporting the seal to a second position wherein the seal is unsupported by the support member, enabling failure of the seal and flow of the fluid.

Abstract: A relief valve is provided and may include a housing having a first inlet port and a second inlet port. An initiator may be disposed within the housing and an engagement member may be slideably disposed within the housing and may be moveable between a retracted position and an extended position under force of the initiator. The engagement member may include a first bore aligned with the first inlet port in the extended position and a second bore aligned with the second inlet port in the extended position.

Abstract: A valve for controlling flow of pressurized fluid from a confined area that is operable to relieve an overpressure condition as well as to allow flow of fluid in response to a pressure relief command. The valve including a valve body with a fluid passage therethrough, a reverse buckling rupture disc in the valve body in normally blocking relationship to the flow of fluid through the passage, and a selectively actuatable device carried by the valve body adjacent the convex surface. The actuatable device is operable to disrupt, without puncturing, the disc so as to initiate reversal and rupture of the disc and to permit flow of the pressurized fluid through the passage.

Abstract: An apparatus includes a component for use in a wellbore, and a nano-based device for activating the component.

Abstract: A dual stage hybrid inflation device includes a first stage gas source including a liquefied gas stored in a first stage pressure vessel and a second stage gas source including a gas generator having a gas output directed into the first stage pressure vessel. The gas generator is isolated from the first stage pressure vessel by a frangible diaphragm that ruptures when the pressure in the gas generator exceeds the pressure in the first stage pressure vessel by a predetermined amount. The gas generator is also isolated from the first stage pressure vessel by an eroding nozzle that temporarily restricts the flow of gas from the gas generator to the first stage pressure vessel after the frangible diaphragm ruptures. The eroding nozzle initially restricts the flow of gas from the gas generator to the first stage pressure vessel to prevent a sudden pressure drop in the gas generator that would cause the pyrotechnic gas generating material to self extinguish.

Abstract: A cold gas generator for inflating a gas bag with help of a gas flowing out of a gas pressure vessel (7) with a discharge opening (1) closed off by a destructible membrane (2) arched in a direction opposite relative to the stored gas, with destruction of the membrane (2) occurring by a hot gas jet aimed at the membrane (2), which jet is produced by ignition of a primer (4) which can be activated by application of an electric pulse. In the filled state of gas pressure vessel (7), the surface (6a) of membrane (2) which is averted from the same is directed in an exposed manner into a room (12) which is in connection with the gas bag via at least one discharge opening (11) and through which the hot gas jet is guided which is focused on the membrane (2) via a nozzle chamber (5).

Abstract: The present invention includes a valve assembly having a fluid flow passage, a piston passage, a closure element and a moveable piston. The fluid flow passage extends from an inlet port to an outlet port. The piston passage transects and is oriented non-parallel to the fluid flow passage. The closure element interrupts fluid communication between the inlet and outlet ports. The piston being moveable within the piston passage between a first and second position, the piston including a head for opening the closure element wherein movement of the piston between the first and second positions enables fluid communication between the inlet and outlet ports. The valve assembly can include an explosive actuation mechanism for rapid actuation of the piston from the first position to the second position.

Abstract: Apparatus deflates a tire following unauthorized access to a motor vehicle. In one embodiment, a self-damaging tire valve assembly is capable of being damaged to such a degree by damage inflicting apparatus in close proximity to the valve assembly that air escapes from the corresponding tire. An activation device housed within the damage inflicting apparatus, when activated, following unauthorized access of a motor vehicle is able to damage the body and grommet of the valve assembly without damaging the tire rim. In one embodiment, a processor transmits an activation signal to a wireless switch following reception of an unauthorized access signal when the motor vehicle is in an armed state.