Patent ID: 7856863

Claim:
A breath sampling device comprising a hollow container defining a sample chamber and formed of at least two parts which fit together and have apertures therein; wherein at least one of said parts is displaceable relative to the other part or parts between a first relative disposition of the parts in which the apertures are open so as to provide a clear path for air to pass through the container, and a second relative disposition of the parts in which the apertures are closed so that there is no path for air to pass through and a volume of air is trapped in the chamber; wherein the container comprises first and second tubular parts, each having side walling and respective end closures, the side walling of the first tubular part having an aperture therein and being a close fit within the side walling of the second tubular part, so that said side walling aperture is respectively uncovered and covered by the side walling of the second tubular part as the parts are moved between their first relative disposition and their second relative disposition; and wherein the respective end closures of the first and second tubular parts lie at a common end of the sample chamber and each end closure has at least one aperture therein which is opened and closed, respectively, as the parts are moved between their first relative disposition and their second relative disposition.