Dose dividing delivery device
First Claim
Patent Images
1. A multiple dose injection device comprising:
- a fluid conduit;
a barrel having a bore, a distal end, and a proximal end wherein the fluid conduit is located at the distal end of the barrel, in fluid communication with the bore and the proximal end of the barrel is adapted to receive a stopper;
a plunger having a distal end and a proximal end and a longitudinal axis wherein the stopper is connected to the distal end of the plunger and movable within the barrel, and the plunger has at least one continuous track formed between the distal and proximal ends of the plunger wherein the at least one continuous track further comprises at least one of each of the following;
a first rest position,a stop position, having a proximal abutment,a second rest position,a camming portion which is skewed to the longitudinal axis of the plunger and formed between the first rest position and the stop position;
a reset portion substantially perpendicular to the axis of the plunger and formed between the stop position and the second rest position; and
,a slider having a follower movable substantially perpendicular to the axis of the plunger, the slider having a user-pressable portion;
wherein when a portion of the plunger is depressed by a user, the follower moves with respect to the plunger along the camming portion of the at least one continuous track, thereby causing radial motion of the follower and movement of the follower to the stop position at which position a plunger distal movement is prevented by contact of the follower to the proximal abutment, wherein the user may apply a biasing force to the user-pressable portion of the slider, thereby moving the follower along the reset portion to the second rest position.
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Accused Products
Abstract
A simple method and device enabling a unit dose from a reservoir is provided. The dose is drawn into the reservoir and is then expelled from the device by depressing a plunger. The plunger has features which divide the dose into discrete intervals. As the plunger is moved during delivery, the features on the plunger and features connected to a barrel interact to provide for intermittent stops to the delivery. Other aspects of the device provide for reduced dead space, safety and selective interconnection with other devices. Thus, the device divides the dose.
78 Citations
32 Claims
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1. A multiple dose injection device comprising:
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a fluid conduit; a barrel having a bore, a distal end, and a proximal end wherein the fluid conduit is located at the distal end of the barrel, in fluid communication with the bore and the proximal end of the barrel is adapted to receive a stopper; a plunger having a distal end and a proximal end and a longitudinal axis wherein the stopper is connected to the distal end of the plunger and movable within the barrel, and the plunger has at least one continuous track formed between the distal and proximal ends of the plunger wherein the at least one continuous track further comprises at least one of each of the following; a first rest position, a stop position, having a proximal abutment, a second rest position, a camming portion which is skewed to the longitudinal axis of the plunger and formed between the first rest position and the stop position; a reset portion substantially perpendicular to the axis of the plunger and formed between the stop position and the second rest position; and
,a slider having a follower movable substantially perpendicular to the axis of the plunger, the slider having a user-pressable portion; wherein when a portion of the plunger is depressed by a user, the follower moves with respect to the plunger along the camming portion of the at least one continuous track, thereby causing radial motion of the follower and movement of the follower to the stop position at which position a plunger distal movement is prevented by contact of the follower to the proximal abutment, wherein the user may apply a biasing force to the user-pressable portion of the slider, thereby moving the follower along the reset portion to the second rest position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A multiple dose injection device comprising:
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a fluid conduit; a barrel having a bore, a distal end, and a proximal end wherein the fluid conduit is located at the distal end of the barrel, in fluid communication with the bore and the proximal end of the barrel is adapted to receive a stopper; a plunger having a distal end and a proximal end and a longitudinal axis wherein the stopper is connected to the distal end of the plunger and movable within the barrel, and the plunger has at least one continuous track formed between the distal and proximal ends of the plunger wherein the at least one continuous track further comprises at least one of each of the following; a first rest position, a stop position, having a proximal abutment, a second rest position, a capturing portion formed between the first rest position and the stop position; a reset portion substantially perpendicular to the axis of the plunger and formed between the stop position and the second rest position; and
,a slider having a follower movable substantially perpendicular to the axis of the plunger, the slider having a user-pressable portion; wherein the follower is biased toward the stop position, thereby radially biasing the follower in the capturing portion to the stop position at which position a plunger distal movement is prevented by contact of the follower to the proximal abutment, wherein a user may apply a reverse biasing force to the user-pressable portion of the slider, thereby moving the follower along the reset portion to the second rest position. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of performing a multiple dose delivery comprising:
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providing a device comprising a fluid conduit;
a barrel having a bore, a distal end, and a proximal end wherein the fluid conduit is located at the distal end of the barrel, in fluid communication with the bore and the proximal end of the barrel is adapted to receive a stopper;
a plunger connected to the stopper and movable within the barrel, thereby forming a reservoir, the plunger having a longitudinal axis and at least one continuous track formed between a distal end of the plunger and a proximal end of the plunger wherein the at least one continuous track further comprises at least one of each of the following;a first rest position, a stop position, having a proximal abutment, a second rest position, a camming portion not parallel to the longitudinal axis of the plunger and formed between the first rest position and the stop position; a reset portion substantially perpendicular to the axis of the plunger and formed between the stop position and the second rest position; and
,a slider having a follower and a user depressable portion; filling the reservoir of the device with a fluid; moving the slider from an initial position wherein the follower is located outside of the at least one continuous track and does not interfere with plunger movement, to a first position wherein the follower is located within the at least one continuous track; depressing a portion of the plunger to dispense a portion of the fluid through the fluid conduit and thereby moving the follower with respect to the plunger along the camming portion of the at least one continuous track, thereby causing radial motion of the follower and movement of the follower to the stop position wherein a plunger distal movement is prevented by contact of the follower to the proximal abutment; applying a biasing force to the user-pressable portion of the slider, thereby moving the follower along the reset portion to the second rest position which coincides with the first rest position; and
,repeating the depressing and applying steps until all the fluid is dispensed from the reservoir.
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Specification