Dose Dividing Delivery Device

摘要

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 the 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.

主权项

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 loading portion of the at least one continuous track located at a distal portion of the plunger;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 and wherein the loading portion constrains movement of the follower to the stop position.