Multi-mode differential fluid displacement pump
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United States of America Patent
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-
Jul 17, 1990
Grant Date -
N/A
app pub date -
Jun 29, 1988
filing date -
Jun 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-mode, differential fluid displacement pump provides for at least two different measured doses. The pump has a chamber in which are mounted a first diameter piston and a second diameter piston defining first and second volumes for reciprocation in the chamber. Means are provided for reciprocating the pistons as desired to obtain predetermined volume changes corresponding to movement of either or both of the first and second pistons. A system of operation and a mixing chamber useful in connection with dosages from the pump are interconnected with the pump.
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