Dose dividing delivery device

Patent metadata

Field	Value
Publication number	US-9579465-B2
Application number	US-201514599806-A
Country	US
Kind code	B2
Filing date	Jan 19, 2015
Priority date	Jan 30, 2008
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

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.

First claim

What is claimed is:

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 starting 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 when the follower is within the starting portion of the at least one continuous track, the follower is subject to guidance of the at least one continuous track.

2. The device as set forth in claim 1 wherein a pattern of the first rest position, the stop position, and the second rest position are repeated along the plunger at an axial distance between corresponding positions, wherein said axial distance multiplied by a cross sectional area of the bore is a unit volume which comprises a unit dose.

3. The device as set forth in claim 2 wherein the unit dose is a plurality of unit doses and all unit doses are substantially equal.

4. The device as set forth in claim 1 further comprising a clip which engages a flange on the barrel and the slider is slidably engaged to the clip.

5. The device as set forth in claim 4 the clip further comprising a plunger guiding portion.

6. The device as set forth in claim 4 wherein the clip and the slider are integrally formed with a slidable relationship.

7. The device as set forth in claim 1 wherein the follower is mounted on a deflectable beam.

8. The device as set forth in claim 7 wherein the reset portion further comprises a detent tab located in the at least one continuous track which deflects the follower.

9. The device as set forth in claim 8 wherein a deflection creates an audible sound, thereby providing feedback to the user.

10. The device as set forth in claim 7 wherein the reset portion further comprises a deflectable detent tab located in the at least one continuous track.

11. The device as set forth in claim 1 wherein the follower is elastically deformed in use.

12. The device as set forth in claim 1 wherein the fluid conduit further comprises a detachable needle assembly having a hub, attachable to the distal end of the barrel and a needle inserted into the hub.

13. The device as set forth in claim 12 wherein the hub further comprises a proximal opening adapted to receive an elongated luer tip located at the distal end of the barrel and is adapted to prevent effective use of a standard luer tipped barrel.

14. The device as set forth in claim 1 further comprising a hub engaged to the barrel having a needle cover removably attached to said hub.

15. The device as set forth in claim 14 further comprising a shield which is slidably engaged to the hub.

16. 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 starting portion of the at least one continuous track located at a distal portion of the plunger,
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 and wherein when the follower is within the starting portion of the at least one continuous track, the follower is subject to guidance of the at least one continuous track.

17. The device as set forth in claim 16 wherein the follower is movable from an initial position wherein the follower is located outside of the at least one continuous track and does not interfere with the plunger movement, to a first position wherein the follower is located within the at least one continuous track.

18. The device as set forth in claim 16 wherein a pattern of the first rest position, the stop position, and the second rest position are repeated along the plunger at an axial distance between corresponding positions, wherein said axial distance multiplied by a cross sectional area of the bore is a unit volume which comprises a unit dose.

19. The device as set forth in claim 16 wherein the follower is mounted on a deflectable beam.

20. The device as set forth in claim 19 wherein a deflection of said deflectable beam creates an audible sound, thereby providing feedback to the user.

Assignees

• Becton Dickinson Co

Inventors

• Baney Bruno
• May Colin
• Dupuis Patrick
• Perot Frederic

Classifications

• A61M5/3293

  characterised by features of the needle hub · CPC title

• A61M5/3134

  characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula · CPC title

• A61M5/31595 Primary

  Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking · CPC title

• A61M5/31528

  by means of rotational movements, e.g. screw-thread mechanisms · CPC title

• A61M5/3243

  being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel (devices for protecting guide needles in combination with catheters A61M25/0612) · CPC title