Electrochemical controlled dispensing assembly and method
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United States of America Patent
Stats
-
Nov 29, 1994
Issued Date -
N/A
app pub date -
Feb 1, 1994
filing date -
Feb 3, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pump assembly (20) employs electrochemistry to selectively control the delivery rate of a dispensing fluid (21) from a dispensing reservoir (24) by selectively controlling the flow rate of a driving fluid (19) from a driving reservoir (23) to a receiving reservoir (33). A partition (25), separating the driving reservoir from the receiving fluid reservoir, includes at least one aperture (28) which is opened or closed depending upon an electrical signal from a remote programming unit. Flow into the receiving reservoir deflects a barrier member to expel dispensing fluid from the dispensing reservoir. The dispensing fluid flow rate can be programmed to provide an appropriate steady or varying flow rate; user-initiated pulses of dispensing fluid can also be provided. A method of controlled infusion of an infusate employing electrochemistry is also provided.
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