Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1997-10-15
1999-10-12
Freay, Charles G.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
604153, F04B 4506
Patent
active
059645830
ABSTRACT:
A liquid delivery device which controls the flow of liquid from a liquid reservoir includes a resilient tubing having a wall with a substantially cylindrical cross-section defining a flow lumen. The flow lumen is in fluid communication with the reservoir. A compression member selectively compresses a lengthwise segment of the cylindrical wall to collapse the flow lumen and releases the lengthwise segment to open the flow lumen. An elastomeric sleeve envelopes greater than half an outer diameter of the cylindrical cross-section of the resilient tubing along at least a portion of the lengthwise segment of the cylindrical wall. The elastomeric sleeve biases the lengthwise segment of the resilient tube to restore it to its substantially cylindrical cross-section when the compression member releases the lengthwise segment.
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Baxter International Inc.
Bratschun Thomas D.
Evora Robert Z.
Freay Charles G.
Kowalik Francis C.
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