Pump apparatus and method including double activation pump apparatus
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United States of America Patent
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-
Nov 15, 1994
Grant Date -
N/A
app pub date -
Nov 25, 1992
filing date -
Nov 25, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A drug pump is disclosed having at least one rotatable cam and a reciprocally mounted follower engaged with the cam, and a tube which is compressed by the follower during rotation of the cam. The drug pump preferably has three followers, including an expulsor follower, an inlet valve follower, and an outlet valve follower. Three cams are provided to reciprocally move the followers, with one cam engaging each follower. The cams are interconnected by a cam shaft. The drug pump is ambulatory and provides two activations per revolution of the cams. The tube loading is nonlinear. Such nonlinear tube loading is taken into consideration to minimize energy consumption and to reduce peak torque loads. A design optimization and manufacturing system is provided to optimize energy consumption of the pump.
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