Infusion pumps and methods and delivery devices and methods with same
First Claim
1. A delivery device for delivering an infusion medium to a user, the device comprising:
- a first housing portion adapted to be secured to a user;
a second housing portion configured to be selectively engaged with and disengaged from the first housing portion to allow disposal of the first housing portion without disposing of the second housing portion, the second housing portion having an enclosed interior volume;
a drive shaft supported by the second housing portion, for movement in a generally linear dimension;
a drive device operatively connected to the drive shaft, to selectively move the drive shaft in the generally linear dimension; and
a pump device supported by the first housing portion, the pump device comprising;
a housing provided with a piston channel having a generally linear, longitudinal axis dimension, an inlet port in fluid flow communication with the channel and configured for connection to a reservoir, and an outlet port in fluid flow communication with the channel and configured for connection in fluid flow communication with an injection site;
a piston located in the piston channel and having a first piston section and a second piston section coupled together for limited movement, relative to each other, the first and second piston sections are spaced from each other in the longitudinal axis dimension of the piston channel, arranged external to each other and end-to-end, and moveable toward and away from each other along the longitudinal axis dimension of the piston channel, and the second piston section having a surface for operable engagement with the drive shaft when the second housing portion and first hosing housing portion are engaged, wherein the piston is moveable with movement of the drive shaft along the longitudinal axis dimension of the piston channel between fill, pull and dispense positions, such that;
in the fill position, the first and second piston sections are separated and spaced apart from each other in the longitudinal axis dimension of the piston channel to form a chamber having volume between the first and second piston sections, and the chamber is aligned in fluid flow communication with the inlet port;
in the pull position, the first and second piston sections are separated and spaced apart from each other in the longitudinal axis dimension of the piston channel and the chamber formed between the first and second piston sections is located within the channel, between the inlet port and the outlet port, out of fluid flow communication with the inlet port and the outlet port;
in the dispense position, the chamber between the first and second piston sections is aligned in fluid flow communication with the outlet port.
1 Assignment
0 Petitions
Accused Products
Abstract
A delivery device includes a durable housing portion and a separable disposable portion that selectively engage and disengage from each other. The disposable housing portion secures to the patient-user and may be disposed of after it has been in use for a prescribed period. Components that normally come into contact with a patient-user or with an infusion medium, including a pump device, are supported by the disposable housing portion for disposal after the prescribed use, while the durable housing portion supports other components such as electronics for controlling delivery of the infusion medium from the reservoir and a drive device and drive linkage.
468 Citations
32 Claims
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1. A delivery device for delivering an infusion medium to a user, the device comprising:
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a first housing portion adapted to be secured to a user; a second housing portion configured to be selectively engaged with and disengaged from the first housing portion to allow disposal of the first housing portion without disposing of the second housing portion, the second housing portion having an enclosed interior volume; a drive shaft supported by the second housing portion, for movement in a generally linear dimension; a drive device operatively connected to the drive shaft, to selectively move the drive shaft in the generally linear dimension; and a pump device supported by the first housing portion, the pump device comprising; a housing provided with a piston channel having a generally linear, longitudinal axis dimension, an inlet port in fluid flow communication with the channel and configured for connection to a reservoir, and an outlet port in fluid flow communication with the channel and configured for connection in fluid flow communication with an injection site; a piston located in the piston channel and having a first piston section and a second piston section coupled together for limited movement, relative to each other, the first and second piston sections are spaced from each other in the longitudinal axis dimension of the piston channel, arranged external to each other and end-to-end, and moveable toward and away from each other along the longitudinal axis dimension of the piston channel, and the second piston section having a surface for operable engagement with the drive shaft when the second housing portion and first hosing housing portion are engaged, wherein the piston is moveable with movement of the drive shaft along the longitudinal axis dimension of the piston channel between fill, pull and dispense positions, such that; in the fill position, the first and second piston sections are separated and spaced apart from each other in the longitudinal axis dimension of the piston channel to form a chamber having volume between the first and second piston sections, and the chamber is aligned in fluid flow communication with the inlet port; in the pull position, the first and second piston sections are separated and spaced apart from each other in the longitudinal axis dimension of the piston channel and the chamber formed between the first and second piston sections is located within the channel, between the inlet port and the outlet port, out of fluid flow communication with the inlet port and the outlet port; in the dispense position, the chamber between the first and second piston sections is aligned in fluid flow communication with the outlet port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A pump device for conveying a fluidic medium, the pump device comprising:
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a housing provided with a piston channel having a generally linear, longitudinal axis dimension, an inlet port in fluid flow communication with the channel and configured for connection to a source of fluidic medium, and an outlet port in fluid flow communication with the channel; and a piston located in the piston channel and having a first piston section and a second piston section coupled together for limited movement, relative to each other, the first and second piston sections are spaced from each other in the longitudinal axis dimension of the piston channel, arranged external to each other and end-to-end, and moveable toward and away from each other along the longitudinal axis dimension of the piston channel, and the second piston section having a surface for receiving a drive force from a drive shaft; wherein the piston is moveable along the longitudinal axis dimension of the piston channel between fill, pull and dispense positions, when a drive force is received from a drive shaft such that; in the fill position, the first and second piston sections are separated from each other in the longitudinal axis dimension of the piston channel to form a chamber having volume between the first and second piston sections, and the chamber is aligned in fluid flow communication with the inlet port; in pull positions, the first and second piston sections are separated from each other in the longitudinal axis dimension of the piston channel and the chamber formed between the first and second piston sections is located within the channel, between the inlet port and the outlet port, out of fluid flow communication with the inlet port and the outlet port; and in the dispense position, the chamber between the first and second piston sections is aligned in fluid flow communication with the outlet port. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of making a pump device for conveying a fluidic medium, the method comprising:
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providing a piston channel in a housing, where the piston channel has a generally linear, longitudinal axis dimension; providing an inlet port in fluid flow communication with the piston channel and configured for connection to a source of fluidic medium; providing an outlet port in fluid flow communication with the piston channel; providing a piston having a first piston section and a second piston section coupled together for limited movement, relative to each other, and arranging the first and second piston sections spaced from and external to each other and end-to-end in the longitudinal axis dimension of the piston channel, for movement toward and away from each other along the longitudinal axis dimension of the piston channel, the second piston section having a surface for receiving a drive force from a drive shaft; and supporting the piston within the piston channel for movement along the longitudinal axis dimension of the piston channel between fill, pull and dispense positions, when a drive force is received from a drive shaft such that; in the fill position, the first and second piston sections are separated from each other in the longitudinal axis dimension of the piston channel to form a chamber having volume between the first and second piston sections, and the chamber is aligned in fluid flow communication with the inlet port; in pull positions, the first and second piston sections are separated from each other in the longitudinal axis dimension of the piston channel and the chamber formed between the first and second piston sections is located within the channel, between the inlet port and the outlet port, out of fluid flow communication with the inlet port and the outlet port; and in the dispense position, the chamber between the first and second piston sections is aligned in fluid flow communication with the outlet port. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification