A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 11/00 (2006.01) A61M 15/00 (2006.01) A62B 7/02 (2006.01) A61M 16/00 (2006.01)
Patent
CA 2347322
A portable oxygen dispenser for providing an emergency supply of oxygen-rich gas includes a closed cannister having a top closure portion and a cylindrical side wall defining a cannister axis and diameter and containing a quantity of pressurized, oxygen- rich. A dispensing orifice includes an externally actuable valve at one axial end of said cannister for maintaining said the orifice normally closed. The valve includes a nozzle stem generally arranged along the cannister axis for opening the orifice when an axial force is applied. An annular neck wall is generally concentrically arranged about the nozzle stem and dimensioned to form an annular space between the nozzle stem and the neck wall. A generally conical diffusing member defines a diffusion axis and opposing axial ends, one of which is a dispensing open end dimensioned to substantially correspond to the cannister diameter; the other end is a closed infusion end and is provided with an inlet opening defining an axis generally transverse to the diffusion axis and stem engaging means for selectively applying an axial force to the nozzle stem. The dispensing end is configured to fit over and be supported on the cannister when not in use. The cannister and the diffusion axes are generally aligned and adapted to be placed over the mouth and/or nose of a user. A protective guide extends from the closed infusion end alone the transverse axis into the annular space for slidingly engaging the annular neck wall with little clearance during use when said cannister and transverse axes are generally aligned and oxygen-rich gas is to be released and for substantially limiting the forces applied to the nozzle stem to axial forces along the cannister axis. In this way, forces on the nozzle stem other than the axial forces along the cannister axis are avoided, thus preventing damage to the nozzle stem during use of the diffusing member.
Mccarthy Tetrault Llp
Welik Ralph
LandOfFree
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