Self-injection device
First Claim
1. A drug delivery device, comprising:
- a body including a top enclosure and a bottom enclosure;
a reservoir disposed within the body for containing a medicament, the reservoir having a rigid portion and a movable portion;
an injection needle for penetrating the skin of the patient, the needle having a lumen and selectively communicating with the reservoir; and
a pressurizing system for selectively pressurizing the reservoir, wherein the pressurizing system comprises;
a plunger movable within the body, the plunger comprising at least one tab extending from an outer edge thereof; and
a pressurization spring compressed by the plunger when the pressurizing system is in a pre-activated position;
wherein in the pre-activated position, the pressurizing system contacts and compresses the movable portion of the reservoir to reduce a finable volume of the reservoir substantially to a predetermined dosage volume;
wherein an immobile retaining portion of the body selectively retains the at least one tab to retain the pressurizing system in the pre-activated position against the force of the pressurization spring; and
wherein the body includes at least one recessed channel to guide the at least one tab during plunger movement.
1 Assignment
0 Petitions
Accused Products
Abstract
A device (100) for delivering a medicament into a patient'"'"'s body by injection into or through the patient'"'"'s skin, including a main body having a top enclosure (116) and a bottom enclosure (104), a reservoir (160) disposed within the main body for containing the medicament, and an injection needle (152) for penetrating the skin of the patient, the needle (152) having a lumen and selectively communicating with the reservoir (160). The device also includes a pressurizing system (600, 140) for selectively pressurizing the reservoir (160). In a pre-activated position, the pressurizing system (600, 140) contacts and compresses the reservoir (160) to reduce the initial volume of the reservoir (160), thereby allowing for partial filling of the reservoir (160).
158 Citations
17 Claims
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1. A drug delivery device, comprising:
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a body including a top enclosure and a bottom enclosure; a reservoir disposed within the body for containing a medicament, the reservoir having a rigid portion and a movable portion; an injection needle for penetrating the skin of the patient, the needle having a lumen and selectively communicating with the reservoir; and a pressurizing system for selectively pressurizing the reservoir, wherein the pressurizing system comprises; a plunger movable within the body, the plunger comprising at least one tab extending from an outer edge thereof; and a pressurization spring compressed by the plunger when the pressurizing system is in a pre-activated position; wherein in the pre-activated position, the pressurizing system contacts and compresses the movable portion of the reservoir to reduce a finable volume of the reservoir substantially to a predetermined dosage volume; wherein an immobile retaining portion of the body selectively retains the at least one tab to retain the pressurizing system in the pre-activated position against the force of the pressurization spring; and wherein the body includes at least one recessed channel to guide the at least one tab during plunger movement. - View Dependent Claims (2)
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3. A drug delivery device, comprising:
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a body including a top enclosure and a bottom enclosure, the bottom enclosure comprising a housing; a reservoir disposed within the body for containing a medicament; an injection needle for penetrating the skin of the patient, the needle having a lumen and selectively communicating with the reservoir; and a pressurizing system for selectively pressurizing the reservoir, wherein in a pre-activated position, the pressurizing system contacts and compresses the reservoir to reduce a finable volume of the reservoir; wherein the pressurizing system comprises; a plunger movable within the housing; and a pressurization spring compressed by the plunger when the pressurizing system is in the pre-activated position; wherein the plunger comprises at least one tab extending from an outer edge thereof; wherein the housing includes at least one recessed channel to guide the at least one plunger tab during plunger movement; wherein the at least one plunger tab comprises a leg extending from the outer edge of the plunger, and a foot extending from the leg; wherein the at least one recessed channel includes a retaining portion; and wherein a resistance between the foot and the retaining portion retains the pressurizing system in the pre-activated position against the force of the pressurization spring. - View Dependent Claims (4, 5, 6)
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7. A drug delivery device, comprising:
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a body including a top enclosure and a bottom enclosure, the bottom enclosure comprising a housing; a reservoir disposed within the body for containing a medicament; an injection needle for penetrating the skin of the patient, the needle having a lumen and selectively communicating with the reservoir; and a pressurizing system for selectively pressurizing the reservoir, wherein in a pre-activated position, the pressurizing system contacts and compresses the reservoir to reduce a fillable volume of the reservoir; wherein the pressurizing system comprises; a plunger movable within the housing; a pressurization spring compressed by the plunger when the pressurizing system is in the pre-activated position; a retention plate disposed on the bottom enclosure; and a post disposed substantially at a center of the housing on one of the retention plate and the plunger, the post having a sprocket disposed at a distal end thereof; wherein the pressurization spring is disposed between the retention plate and the plunger; wherein the remaining one of the retention plate and the plunger includes an opening with a shape corresponding to the sprocket, the opening having slots interposed between fingers of remaining one of the retention plate and the plunger; and wherein in the pre activated position, teeth of the sprocket align with said fingers to maintain the pressurization spring compression. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A drug delivery device, comprising:
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a body including a top enclosure and a bottom enclosure; a reservoir disposed within the body for containing a medicament; an injection needle for penetrating the skin of the patient, the needle having a lumen and selectively communicating with the reservoir; and a pressurizing system for selectively pressurizing the reservoir, wherein in a pre-activated position, the pressurizing system contacts and compresses the reservoir to reduce a fillable volume of the reservoir; wherein the bottom enclosure comprises a cylindrical housing; wherein the pressurizing system is disposed within the cylindrical housing and comprises; a plunger movable within the cylindrical housing; and a pressurization spring compressed by the plunger when the pressurizing system is in the pre-activated position; wherein the plunger comprises at least one tab extending from an outer edge thereof; wherein the cylindrical housing includes at least one recessed channel to guide the at least one plunger tab during plunger movement; wherein the at least one plunger tab comprises a leg extending from the outer edge of the plunger, and a foot extending from the leg; wherein the at least one recessed channel includes a retaining portion; and wherein a resistance between the foot and the retaining portion retains the pressurizing system in the pre-activated position against the force of the pressurization spring.
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Specification