Electro-osmotic pumps, systems, methods, and compositions
First Claim
1. A direct current electro-osmotic pump comprising:
- a porous, platinum-free, carbon-based cathode;
a porous, platinum-free carbon anode; and
a porous ceramic membrane between the cathode and the anode having a first surface and a second surface opposite the first surface,wherein the porous ceramic membrane comprises vitreous ceramic spheres from about 0.1 μ
m to about 10 μ
m in diameter selected from the group consisting of uncoated silica spheres, spheres comprising oxides of silicon and phosphorus, spheres comprising oxides of silicon and boron, and combinations thereof,wherein at least a part of the first surface of the membrane is in physical contact with the anode,and at least a part of the second surface is in physical contact with the cathode, andwherein the pump is configured to operate at a potential difference (V) between the anode and the cathode of V≦
3 volts without producing bubbles visible to a naked eye.
1 Assignment
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Accused Products
Abstract
The present disclosure relates, according to some embodiments, to compositions, methods, devices, and systems for delivering a composition (e.g., a fluid composition) to a subject. For example, the present disclosure relates to non-gassing, direct current (DC), electro-osmotic pumps in some embodiments. A pump may comprise an anode (e.g., a porous silver/silver oxide anode), a cathode (e.g., a porous silver/silver oxide cathode), and a membrane (e.g., a porous ceramic membrane) positioned at least partially between the anode and the cathode in some embodiments. A pump system may comprise an electro-osmotic pump, a reservoir comprising a pump fluid chamber in fluid communication with the electro-osmotic pump and a delivery fluid chamber in fluid communication with the electro-osmotic pump; a controller assembly in electrical communication with the anode and the cathode; and a cannula and/or a needle in fluid communication with the delivery fluid chamber. A pump fluid may comprise water and/or a delivery fluid may comprise a drug, in some embodiments.
29 Citations
9 Claims
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1. A direct current electro-osmotic pump comprising:
-
a porous, platinum-free, carbon-based cathode; a porous, platinum-free carbon anode; and a porous ceramic membrane between the cathode and the anode having a first surface and a second surface opposite the first surface, wherein the porous ceramic membrane comprises vitreous ceramic spheres from about 0.1 μ
m to about 10 μ
m in diameter selected from the group consisting of uncoated silica spheres, spheres comprising oxides of silicon and phosphorus, spheres comprising oxides of silicon and boron, and combinations thereof,wherein at least a part of the first surface of the membrane is in physical contact with the anode, and at least a part of the second surface is in physical contact with the cathode, and wherein the pump is configured to operate at a potential difference (V) between the anode and the cathode of V≦
3 volts without producing bubbles visible to a naked eye. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification