| 摘要 |
A mouthpiece assembly for a breathing apparatus comprising a housing, a disposable liner, and a protective sheath. The housing comprises a conical opening extending therethrough. The liner is conical and is adapted to be received in the housing. A seal is provided between the liner and the housing to prevent leakage of air. The liner includes a member for engaging the lips of the user when the mouthpiece is in use. The sheath is located between the housing and the liner. Additionally, the liner includes alignment members which are suitable for aligning the liner with the housing and for spacing adjacent liners when they are stacked.
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