A thermally activatable safety valve has at least one microwave transmitter and microwave transmitter component. The microwave transmitter and/or the microwave transmitter component is designed to heat at least one thermally activatable opening element.

An apparatus comprises a frangible structure coupled or integral to at least a portion of the apparatus and a triggerable mechanism disposed at or proximate the frangible structure. The triggerable mechanism is configured to break the frangible structure in response to a trigger signal. A containment structure is disposed on or over at least a portion of the frangible structure. The containment structure is configured to allow at least the portion of the frangible structure to deform or change shape in response to breaking of the frangible structure while keeping substantially all fragments of at least the portion of the broken frangible structure together.

The protection device has a valve and a valve actuator, able to move the valve to a closed position when a pressure upstream of the valve exceeds a predetermined threshold pressure. The valve actuator includes a biaiser, to maintain the valve in an open position; an actuation mechanism, to move the valve to the closed position, the actuation mechanism with a fluid sampling passage to fluidly connect the flow line to a fluid actuated surface of the actuation mechanism. At least a rupture element preventing the passage of fluid from the flow line when the pressure upstream of the rupture element is lower than the threshold pressure, the rupture element being able to break at the threshold pressure.

The protection device has a valve and a valve actuator, able to move the valve to a closed position when a pressure upstream of the valve exceeds a predetermined threshold pressure. The valve actuator includes a biaiser, to maintain the valve in an open position; an actuation mechanism, to move the valve to the closed position, the actuation mechanism with a fluid sampling passage to fluidly connect the flow line to a fluid actuated surface of the actuation mechanism. At least a rupture element preventing the passage of fluid from the flow line when the pressure upstream of the rupture element is lower than the threshold pressure, the rupture element being able to break at the threshold pressure.

A gas flow arrestor is provided that is configured to be coupled at one end to an oxygen concentrator, a VIPR type device associated with a compressed gas cylinder, or other gas delivery component such as a regulator or flowmeter and at the opposing end to a length of flexible tubing or hose that delivers the medical gas to the patient or patient breathing apparatus, such as a nasal cannula or breathing mask. The gas flow arrestor device includes a firebreak together with a visual flow indicator that is actuated by the flow of gas through the gas flow arrestor device. The visual flow indicator allows a user or patient to visually confirm from a distance whether or not gas is flowing to the patient or breathing apparatus.

One or more techniques and/or systems are disclosed for interrupting fluid flow when experiencing fuel leaking conditions, such as an out of specification connection between the fuel source and a device utilizing the fluid. A distal end of a valve body has interfaces with at least a portion of a connection to a fluid supply; and a proximal end interfaces with at least a portion of a fuel intake. An internal passage runs between the proximal end and distal ends of. A displacement member in the internal passage comprises a distal portion that extends out of the valve to engage a valve to the fuel supply. A retention cap selectably engaged with the valve body can comprise a material that deforms under force at a predetermined temperature, resulting in a release of the displacement member under a biasing force form a biasing component between the cap and displacement member.

One or more techniques and/or systems are disclosed for interrupting fluid flow when experiencing fuel leaking conditions, such as an out of specification connection between the fuel source and a device utilizing the fluid. A distal end of a valve body has interfaces with at least a portion of a connection to a fluid supply; and a proximal end interfaces with at least a portion of a fuel intake. An internal passage runs between the proximal end and distal ends of. A displacement member in the internal passage comprises a distal portion that extends out of the valve to engage a valve to the fuel supply. A retention cap selectably engaged with the valve body can comprise a material that deforms under force at a predetermined temperature, resulting in a release of the displacement member under a biasing force form a biasing component between the cap and displacement member.

An automatic shutoff valve for breakaway wet barrel fire hydrant is disclosed. In general, one aspect disclosed features an apparatus comprising: a valve housing comprising a valve body, a flange, and a valve seat; a valve pedal configured to engage the valve seat and prevent fluid flow through the valve seat in a closed position, and to permit fluid flow through the valve seat in an open position; a lockout tab disposed within the valve body, wherein the lockout tab maintains the valve pedal in the open position; a lockout bar disposed distally from the valve body; and an activation rod mechanically coupled to the lockout bar and configured to keep the valve pedal engaged with the lockout tab.

A system for rupturing a vacuum in a medical imaging device. The system includes a vacuum plug attached to the medical imaging device and configured to retain a vacuum in the medical imaging device. A puncture tool is configured to puncture the vacuum plug to rupture the vacuum in the medical imaging machine. A puncture tool retainer removably couples the puncture tool to the medical imaging device.

A burst disc system can include a plurality of burst discs serially arranged to successively rupture one at a time. Each burst disc can be configured to rupture at one or more set burst pressures. The system can include an indicator configured to allow a user to receive an indication that a last burst disc of the plurality of burst discs has ruptured.