| 摘要 |
A single flow valve is disclosed for use in a hypodermic needle. The flow valve comprises a valve chamber interposed between the needle and a syringe connector, and valve means mounted within the valve chamber. The valve means controls fluid flow through the valve chamber to a single-shot of fluid in one direction, and has a normal partially tensioned position, an optimum tensioned position on one side of the normal partially tensioned position, and a latched closed position on the opposite side of the normal partially tensioned position. The valve means is movable to its optimum tensioned position in response to fluid flow through the valve chamber in the one direction. The valve means is movable from the optimum tensioned position to its latched closed position in response to the inherent tension therein when the flow of fluid is abated. In the latched closed position, further fluid flow through the valve chamber in the one direction is prevented.
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