Abstract: There is disclosed a threaded connector configured to connect a pneumatic system of a breathing apparatus to a threaded connection of a breathing gas cylinder. The threaded connector comprises a rotatable threaded element configured to connect to a corresponding thread of a breathing gas cylinder, the rotatable threaded element being rotatable to tighten the threaded element to the corresponding thread and to untighten the threaded element from the corresponding thread; and a holding apparatus configured to selectively permit rotation of the threaded element when an applied torque applied to the threaded element exceeds a threshold torque. Also disclosed is a breathing apparatus comprising a threaded connector.

Abstract: There is disclosed a demand regulator for a breathing apparatus comprising: a first connector point; and a second connector point, wherein the first connector point and the second connector point are each configured to connect to a universal connector. Also disclosed is a breathing apparatus comprising a demand regulator or a demand regulator system.

Abstract: Disclosed is a breathing apparatus comprising a pressure vessel. The pressure vessel may comprise a composite shell formed from a plurality of fibres and a matrix comprising a resin material and graphene particles. The pressure vessel may comprise at least one permeation barrier layer comprising graphene microparticles or graphene nanoparticles provided on an outer surface of the structural shell or on an outer surface of the liner. Methods of manufacture for pressure vessels are also disclosed.

Abstract: There is disclosed a lung demand regulator for a breathing apparatus comprising: a flow regulation mechanism having a closed configuration; a connection mechanism for releasably connecting the lung demand regulator to a face mask; and a lockout mechanism for locking the flow regulation mechanism in the closed configuration, the lockout mechanism configured to be activated by at least one release element, the movement of the at least one release element being translated to the lockout mechanism via a cam element and cam follower arrangement. Also disclosed is a face mask comprising a lung demand regulator and a breathing apparatus comprising a lung demand regulator.

Abstract: There is disclosed a valve assembly for a lung demand regulator of a breathing apparatus. The valve assembly comprises a regulator valve apparatus for regulating a flow of breathing gas, the regulator valve apparatus being actuatable between a closed position in which no flow is permitted and an open position in which flow is permitted. The valve assembly further comprises a lockout mechanism configurable in: i) a lockout configuration in which the regulator valve apparatus is secured in the closed position, and ii) a release configuration in which the regulator valve apparatus is freely moveable. The lockout mechanism comprises an axially compressible spring element. The lockout mechanism is configured such that the spring element is axially compressed during movement of the lockout mechanism between the release configuration and the lockout configuration. Also disclosed is a lung demand regulator and a breathing apparatus comprising a lung demand regulator.