Pneumatic whistle

Abstract

There is disclosed a pneumatic whistle for a breathing apparatus comprising: a whistle body comprising an opening; a whistle flute connected to the whistle body; a fluid ingress path formed at an interface between the whistle body and the whistle flute; a fastener configured to secure the whistle flute to the whistle body, the fastener forming a fluid ingress point on the fluid ingress path; a sealing element configured to form a seal between the whistle body and the whistle flute on the fluid ingress path, so as to inhibit fluid ingress along the fluid ingress path beyond the sealing element; wherein the sealing element is arranged downstream of the fluid ingress point along the fluid ingress path. Also disclosed is a breathing apparatus comprising a pneumatic whistle.

Dependencies are inferred from the claim text.