Vanishing chamber construction for liquid sampler
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United States of America Patent
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Jun 27, 1989
Issued Date -
N/A
app pub date -
Jun 27, 1988
filing date -
Jun 8, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a vanishing chamber pump mechanism, an improved apparatus is set forth. The preferred embodiment incorporates a resilient plug adapted to work opposite an anvil which relatively reciprocates to pump sample trapped in the hemispherical chamber within said resilient plug. The improved version incorporates a metallic insert axially centered in the hemispherical cavity, and it is anchored in place by an enlarged root extending into the body which is intervally cast around the insert.
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