Variable fill drug delivery device
First Claim
1. A variable fill drug delivery device, comprising:
- a container configured to store a user-selectable amount of a therapeutic agent;
a plunger positioned in the container; and
an infusion engine coupled to the plunger, the infusion engine configured to retain the plunger prior to activation of the variable fill drug delivery device, the infusion engine configured to release the plunger after activation of the variable fill drug delivery device and to drive the plunger from a first position within the container to a second position within the container to expel the user-selectable amount of the therapeutic agent from the container for delivery to a patient,wherein the infusion engine comprises a flexure beam housing attached to the plunger by a first plunger latch and a second plunger latch,wherein the first plunger latch is attached to a first depending tab portion of a first arm of the plunger and the second plunger latch is attached to a second depending tab portion of a second arm of the plunger,wherein the first plunger latch is positioned at an end of a first arm of the flexure beam housing and the second plunger latch is positioned at an end of a second arm of the flexure beam housing,wherein the infusion engine further comprises a release coupler positioned between the first and second arms of the flexure beam housing, an end of the release coupler attached to the plunger,wherein the release coupler is coupled to a fixed thrust component,wherein the fixed thrust component comprises a base and a spline shaft extending from the base, wherein the release coupler is coupled to the spline shaft of the fixed thrust component, the release coupler and the spline shaft forming a slip joint,wherein the base of the fixed thrust component is coupled to a release component,wherein the infusion engine further comprises a clutch spring positioned around the base of the fixed thrust component and coupled to the flexure beam housing,wherein the infusion engine further comprises a first compression spring positioned around the first and second arms of the flexure beam housing.
2 Assignments
0 Petitions
Accused Products
Abstract
Variable fill drug delivery devices for delivering a therapeutic agent to a patient are provided. A variable fill drug delivery device includes a drug container to store a variable amount (or user-selectable amount) of a therapeutic agent. A plunger of the variable fill drug delivery device is positioned in the drug container. An infusion engine of the variable fill device is coupled to the plunger. The infusion engine retains the plunger prior to activation of the variable fill drug delivery device and releases the plunger after activation of the variable fill drug delivery device. After activation, the infusion engine drives the plunger from a first position within the drug container to a second position within the drug container to expel the variable amount of the therapeutic agent from the drug container for delivery to a patient.
122 Citations
21 Claims
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1. A variable fill drug delivery device, comprising:
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a container configured to store a user-selectable amount of a therapeutic agent; a plunger positioned in the container; and an infusion engine coupled to the plunger, the infusion engine configured to retain the plunger prior to activation of the variable fill drug delivery device, the infusion engine configured to release the plunger after activation of the variable fill drug delivery device and to drive the plunger from a first position within the container to a second position within the container to expel the user-selectable amount of the therapeutic agent from the container for delivery to a patient, wherein the infusion engine comprises a flexure beam housing attached to the plunger by a first plunger latch and a second plunger latch, wherein the first plunger latch is attached to a first depending tab portion of a first arm of the plunger and the second plunger latch is attached to a second depending tab portion of a second arm of the plunger, wherein the first plunger latch is positioned at an end of a first arm of the flexure beam housing and the second plunger latch is positioned at an end of a second arm of the flexure beam housing, wherein the infusion engine further comprises a release coupler positioned between the first and second arms of the flexure beam housing, an end of the release coupler attached to the plunger, wherein the release coupler is coupled to a fixed thrust component, wherein the fixed thrust component comprises a base and a spline shaft extending from the base, wherein the release coupler is coupled to the spline shaft of the fixed thrust component, the release coupler and the spline shaft forming a slip joint, wherein the base of the fixed thrust component is coupled to a release component, wherein the infusion engine further comprises a clutch spring positioned around the base of the fixed thrust component and coupled to the flexure beam housing, wherein the infusion engine further comprises a first compression spring positioned around the first and second arms of the flexure beam housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification