Osmotic pump with remotely controlled osmotic pressure generation
First Claim
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1. An osmotic pump system comprising:
- a body structure configured for placement in an environment;
a delivery reservoir capable of containing a delivery fluid to be delivered into the environment;
an osmotic chamber;
an osmotic pressure-generating material contained within the osmotic chamber, the generation of osmotic pressure by the osmotic pressure-generating material controllable by an electromagnetic field control signal;
a pressure-responsive movable barrier separating the osmotic chamber from the delivery reservoir, the pressure-responsive barrier being substantially impermeable to the osmotic pressure-generating material and configured to move in response to a change in pressure in the osmotic chamber to produce a change in at least one of pressure or volume in the delivery reservoir;
and a semi-permeable membrane separating the osmotic chamber from an osmotic fluid source, the semi-permeable membrane being substantially permeable by fluid from the osmotic fluid source but substantially impermeable to the osmotic pressure-generating material.
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Abstract
Embodiments of a system including a remotely controlled osmotic pump device and associated controller are described. Methods of use and control of the device are also disclosed. According to some embodiments, an osmotic pump device is placed in an environment in order to pump a material into the environment or into an additional fluid handling structure within the osmotic pump device. Exemplary environments include a body of an organism, a body of water, or an enclosed volume of a fluid. In selected embodiments, a magnetic field, an electric field, or electromagnetic control signal may be used.
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Citations
127 Claims
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1. An osmotic pump system comprising:
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a body structure configured for placement in an environment;
a delivery reservoir capable of containing a delivery fluid to be delivered into the environment;
an osmotic chamber;
an osmotic pressure-generating material contained within the osmotic chamber, the generation of osmotic pressure by the osmotic pressure-generating material controllable by an electromagnetic field control signal;
a pressure-responsive movable barrier separating the osmotic chamber from the delivery reservoir, the pressure-responsive barrier being substantially impermeable to the osmotic pressure-generating material and configured to move in response to a change in pressure in the osmotic chamber to produce a change in at least one of pressure or volume in the delivery reservoir;
and a semi-permeable membrane separating the osmotic chamber from an osmotic fluid source, the semi-permeable membrane being substantially permeable by fluid from the osmotic fluid source but substantially impermeable to the osmotic pressure-generating material. - View Dependent Claims (3, 17, 39, 44, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116)
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51. An osmotic pump system comprising:
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an osmotic pump device including;
a body structure configured for placement in an environment;
a delivery reservoir capable of containing a delivery fluid to be delivered into the environment;
an osmotic chamber;
an osmotic pressure-generating material contained within the osmotic chamber, the generation of osmotic pressure by the osmotic pressure-generating material controllable by an electromagnetic field control signal;
a pressure-responsive movable barrier separating the osmotic chamber from the delivery reservoir, the pressure-responsive barrier being substantially impermeable to the osmotic pressure-generating material and configured to move in response to a change in pressure in the osmotic chamber to produce a change in at least one of pressure or volume in the delivery reservoir; and
a semi-permeable membrane separating the osmotic chamber from an osmotic fluid source, the semi-permeable membrane being substantially permeable by fluid from the osmotic fluid source but substantially impermeable to the osmotic pressure-generating material; and
a remote control signal source capable of generating an electromagnetic field control signal sufficient to control the generation of osmotic pressure by the osmotic pressure-generating material within the osmotic chamber of the osmotic pump device. - View Dependent Claims (52, 53, 117, 118)
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66. A remote controller for an osmotic pump device, comprising:
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an electromagnetic signal generator capable of producing an electromagnetic signal sufficient to activate a remotely activatable control element of an osmotic pump device located in an environment to change a concentration of an osmotic pressure-generating material within an osmotic chamber of the osmotic pump device; and
an electromagnetic signal transmitter capable of wirelessly transmitting the electromagnetic signal to the remotely activatable control element. - View Dependent Claims (73, 77, 119, 120, 121, 122, 123, 124, 125, 126, 127)
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Specification