| 摘要 |
A mouthpiece for a hydration system designed for drinking liquids from that system. The mouthpiece comprises a body having an internal conduit passing through it, the internal conduit having a broad portion provided with a broad opening and a narrow portion provided with a narrow opening, a piston member having a distal portion and a proximal portion, the piston member provided with a passageway passing through it, the passageway having a first opening at said proximal portion and a second opening between said proximal portion and said distal portion. At least a portion of the piston member is inserted in said conduit fitting inside the broad portion while the distal portion of the piston member is adapted to fit inside the narrow portion. The piston member is adapted to coaxially move within the body. The mouthpiece further provided with an O-ring closely encircling the distal portion of the piston member. The piston member can move between two positions, a first closed position preventing passage of liquid through the mouthpiece, in which the distal portion fits inside said narrow portion while pushing said O-ring opposite said narrow portion so as to sealingly block passage of liquid through the passageway, and a second open position allowing passage of liquid through said mouthpiece, in which said piston member is coaxially retracted outwardly from said narrow portion allowing passage of liquid through said second opening into said passageway. The narrow opening of the body acts as the inlet of said mouthpiece and said first opening in said piston member acts as the outlet of said mouthpiece.
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