Infusion device and inlet structure for same
First Claim
1. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
- a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and
an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having an inlet opening and a generally cone-shaped depression for receiving and guiding a tip of a needle toward the inlet opening, the generally cone-shaped depression having an average angle of convergence within the range of about 60° and
about 150°
.
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Accused Products
Abstract
An infusion device includes a disc-shaped housing that is made from a biocompatible material. The housing contains a reservoir for holding a volume of infusion medium, such as a medication to be administered to the patient. The inlet structure is coupled in flow communication with the reservoir, to allow the reservoir to be filled or refilled. The housing has an outlet through which the infusion medium may be expelled. Any one or combination of aspects may be employed to minimize or reduce the required thickness T of the inlet structure and of the infusion device, including: the selection of a convergence angle of the cone-shaped depression to be within the range of about 60° and 180° and, preferably about 150°; a septum having one or more sealing ribs or a recess for receiving a support ring, to allow the septum to be made relatively thin without compromising sealing or support functions; a cup member having grooves and indentations formed in its inner surfaces, to improve flow of infusion medium without added structural thickness; a valve member having a relatively shallow needle-receiving depression or having a recess for receiving and sharing thickness with a the spring; and an inlet configuration which accommodates a needle having an opening located near its tip and, thus, employs a relatively short stroke of the valve member between closed and open states of the valve member.
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Citations
41 Claims
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1. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
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a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having an inlet opening and a generally cone-shaped depression for receiving and guiding a tip of a needle toward the inlet opening, the generally cone-shaped depression having an average angle of convergence within the range of about 60° and
about 150°
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
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a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having an inlet opening, a septum and a support member; wherein the septum has a thickness dimension and a recess and is disposed in relation to the inlet opening, to seal the inlet opening; wherein the support member has a thickness dimension and is disposed within the recess of the septum to support the septum, such that at least a portion of the thickness of the support member overlaps a portion of the thickness of the septum to reduce the combined thickness of the septum and support member. - View Dependent Claims (21, 22, 23)
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24. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
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a housing having, a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having an inlet opening, a septum, a cup-shaped member in which the septum is disposed; the septum includes at least one rib contacting the cup-shaped member for improving a seal between the septum and the cup-shaped member. - View Dependent Claims (25, 26, 27, 28)
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29. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
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a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having a septum and a cap member provided with an inlet opening; wherein the cap member has an inner surface disposed adjacent the septum and wherein the septum includes at least one rib contacting the inner surface of the cap member for improving a seal between the septum and the cap member. - View Dependent Claims (30, 31)
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32. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
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a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having a septum, a cap member provided with an inlet opening, and a cup-shaped member in which the septum is disposed; wherein the septum has a surface in contact with the cap member, adjacent the inlet opening, to seal the inlet opening; wherein the cap member comprises a first threaded surface and the cup-shaped member comprises a second threaded surface coupled to the first threaded surface of the cap member in a threaded manner; and wherein the threaded coupling of the first and second threaded surfaces may be tightened or loosened by rotating the cap member and the cup-shaped member relative to each other, to adjust the seal of the septum against the cap member. - View Dependent Claims (33, 34)
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35. An infusion device for delivering infusion medium to a patient and for receiving infusion medium from a hollow needle during a fill or re-fill operation, the device comprising:
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a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having a septum, a moveable valve member moveable between a first state and a second state, a spring tensioned to impart a force against the moveable valve member to urge the valve member toward the first state, a cap member provided with an inlet opening, and a cup-shaped member in which the septum, valve member and means for imparting a force are disposed; wherein the septum has a first surface in contact with the cap member and a second surface defining a valve seat in contact with the valve member wherein the cap member comprises a threaded surface and the cup-shaped member comprises a further threaded surface coupled to the threaded surface of the cap member in a threaded manner; and wherein the threaded coupling of the threaded surfaces of the cap member and cup-shaped member may be tightened or loosened by rotating the cap member and the cup-shaped member relative to each other, to adjust the tension of the spring and the spring force against the valve member.
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36. An infusion device for delivering infusion medium to a patient and for receiving a hollow needle during a fill, re-fill operation or medium withdrawal operation, the device comprising:
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a housing having a reservoir portion for containing a volume of infusion medium and an outlet through which infusion medium may be dispensed; and an inlet structure provided in fluid flow communication with the reservoir portion of the housing, the inlet structure having a cap member provided with an inlet opening through which a needle may pass during a fill, re-fill or medium withdrawal operation, the inlet structure further including a septum disposed on one side of the inlet opening and having a central portion through which a needle may pass during a fill, re-fill or medium withdrawal operation; wherein the septum includes a tapered surface facing the cap member and wherein the cap member includes a tapered depression for engaging the tapered surface of the septum and imparting a force directed toward the central portion of the septum, upon the septum being pressed against the cap member. - View Dependent Claims (37, 38, 39, 40, 41)
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Specification