Breathing gas heater for use by a diver comprising double walled cylinder and inner container filled with hot liquid prior to use

摘要

A self-contained, portable breathing gas heating system to be used by a diver for submersion in a cold environment consisting of a heat exchanger in an insulated container and a preheated liquid through which the breathing gas circulates in tubing connecting the breathing gas source (tank) to the breathing outlet which is secured in the mouth of the diver.