Abstract: A pressure-operated check valve assembly for a fuel tank inerting system includes a valve body having a fluid flow path between an inlet and an outlet, a plurality of poppets arranged in series in the fluid flow path, and an actuator in the valve body that is movable in response to fluid pressure in the valve body to actuate open the poppets or enable the poppets to close. Each poppet may be movable in the flow path independent of the other poppets to thereby provide independent and redundant functionality. The poppets may be normally biased toward closed, and activation of the actuator in response to fluid pressure being greater than a predefined threshold level may cause the actuator to overcome the biasing force of the poppets to urge the poppets to open. A flow restrictor downstream of the poppets may facilitate buildup of upstream pressure to enable low cracking pressure.

Abstract: A gun-lock device includes a tubular assembly that fits within the bore and a chamber plug member that fits within the chamber of a firearm. The tubular assembly is partially received into the chamber plug member, wherein spring-loaded expandable arrangement at the end thereof engages with the recess within the chamber plug member to lock the tubular assembly within the barrel. The lock subassembly includes a tumbler cylinder arranged to rotate about the longitudinal axis of the tubular assembly and a set of lock-pins which are disposed parallel to, and in a circular formation about, the longitudinal axis of the tumbler cylinder. The resulting overall arrangement yields a compactly packaged gun-lock device suitable for use in combination with a holster-worn firearm, and the key, with such small size and ornate shape, suitable for being mounted on a ring to be worn by the user at all times. A spring loaded plunger mechanism enhances the speed and ease of operation by adding a self-eject feature to the device.