Drug-delivery pumps and methods of manufacture
First Claim
Patent Images
1. An implantable electrolytic pump comprising:
- a first expandable diaphragm and a second flexible diaphragm;
first and second chambers each for containing a fluid, wherein the first expandable diaphragm separates the first and second chambers and provides a fluid barrier therebetween, and the second chamber is formed between the first expandable diaphragm and the second flexible diaphragm;
a perforated shell over the second flexible diaphragm;
a cannula for conducting liquid from the second chamber; and
electrolysis electrodes within the first chamber for causing generation of a gas therein and to thereby expand the expandable diaphragm so that fluid is forced from the second chamber into the cannula, whereby body fluid is admitted through the shell perforations to relieve vacuum pressure on the second chamber.
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Abstract
Embodiments of an implantable electrolytic pump include a first expandable diaphragm and a second flexible diaphragm, and first and second chambers each for containing a fluid, wherein the first expandable diaphragm separates the first and second chambers and provides a fluid barrier therebetween, and the second chamber is formed between the first expandable diaphragm and the second flexible diaphragms. The pump may further include electrolysis electrodes within the first chamber for causing generation of a gas therein and to thereby expand the expandable diaphragm so that fluid is forced from the second chamber into a cannula.
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Citations
50 Claims
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1. An implantable electrolytic pump comprising:
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a first expandable diaphragm and a second flexible diaphragm; first and second chambers each for containing a fluid, wherein the first expandable diaphragm separates the first and second chambers and provides a fluid barrier therebetween, and the second chamber is formed between the first expandable diaphragm and the second flexible diaphragm; a perforated shell over the second flexible diaphragm; a cannula for conducting liquid from the second chamber; and electrolysis electrodes within the first chamber for causing generation of a gas therein and to thereby expand the expandable diaphragm so that fluid is forced from the second chamber into the cannula, whereby body fluid is admitted through the shell perforations to relieve vacuum pressure on the second chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification