Syringe Assembly with Inverse Delivery

Patent metadata

Field	Value
Publication number	US-2016235918-A1
Application number	US-201615140886-A
Country	US
Kind code	A1
Filing date	Apr 28, 2016
Priority date	Aug 21, 2009
Publication date	Aug 18, 2016
Grant date	—

Abstract

A reduced profile syringe assembly is provided that includes an overall profile that is substantially similar to a profile of a syringe barrel. The syringe assembly includes a plunger rod that is significantly disposed within the syringe barrel when filled for use, with the plunger rod adapted to be retracted from the syringe barrel during dispensing of contents of the syringe barrel.

First claim

What is claimed is:

1 . A syringe assembly having a reduced profile prior to use, comprising:
a syringe barrel having an inside surface defining a chamber, an open proximal end, and a distal end having an opening therethrough; a plunger assembly disposed at least partially within the syringe barrel, the plunger assembly comprising an elongate plunger rod and a plunger head disposed on the plunger rod and slidably disposed within the syringe barrel, the plunger head separating the chamber of the syringe barrel into a proximal chamber adjacent the proximal end and a distal chamber adjacent the distal end; and a conduit extending across the plunger head between the proximal chamber and the opening at the distal end of the syringe barrel, the conduit comprising a tubing having a first end positioned adjacent the opening at the distal end of the syringe barrel and a second end fixed with respect to the plunger head, wherein the syringe assembly is adapted to contain a fluid in the proximal chamber, wherein the fluid contained within the proximal chamber is adapted to be expelled through the conduit and out of the opening at the distal end of the syringe barrel upon movement of the plunger head toward the proximal end of the syringe barrel, and wherein movement of the plunger head toward the proximal end of the syringe barrel occurs based on conventional operation of expelling fluid from a conventional syringe with a squeezing movement between a thumb and forefinger.

2 . The syringe assembly of claim 1 , wherein the plunger assembly further comprises an actuator portion at least partially extending externally outside of the syringe barrel and adapted to effect movement of the plunger head within the syringe barrel.

3 . The syringe assembly of claim 2 , wherein the actuator portion is interconnected with the plunger head.

4 . The syringe assembly of claim 3 , wherein the actuator portion is interconnected with the plunger head through an opening in a sidewall of the syringe barrel.

5 . The syringe assembly of claim 3 , wherein the actuator portion is interconnected with the plunger head through the open proximal end of the syringe barrel.

6 . The syringe assembly of claim 5 , wherein the plunger assembly further comprises an external arm extending from the actuator portion externally along the syringe barrel.

7 . The syringe assembly of claim 6 , wherein the plunger rod comprises an elongate portion which is interconnected with the external arm.

8 . The syringe assembly of claim 7 , further comprising a connecting arm extending between the external arm and the elongate portion of the plunger rod.

9 . The syringe assembly of claim 5 , wherein the plunger assembly further comprises an external arm extending externally along the syringe barrel between the actuator portion and a connector arm, wherein the connector arm extends between the external arm and an elongate portion of the plunger rod, and wherein the elongate portion extends between the connector arm and the plunger head.

10 . The syringe assembly of claim 2 , wherein the actuator portion comprises a perimetrical flange collar comprising at least one flange.

11 . The syringe assembly of claim 2 , wherein the actuator portion comprises at least two flanges each configured to receive a forefinger of a user of the syringe assembly.

12 . The syringe assembly of claim 1 , further comprising a closure adapted to close the open proximal end of the syringe barrel.

13 . The syringe assembly of claim 12 , wherein the closure comprises an elongated neck portion configured to fit against the inside surface of the syringe barrel with an interference fit.

14 . The syringe assembly of claim 12 , wherein the closure comprises a finger pad portion comprising a tactile surface disposed on an external surface thereof.

15 . The syringe assembly of claim 14 , wherein the finger pad portion extends externally of the syringe barrel in a radial direction.

16 . The syringe assembly of claim 1 , wherein the second end of the tubing is directly adjacent a proximal end of the plunger head.

17 . The syringe assembly of claim 1 , wherein the tubing is a flexible tubing contained in the distal chamber and adapted to expand upon movement of the plunger head.

18 . The syringe assembly of claim 1 , wherein the tubing is in the form of a wound coil contained in the distal chamber and adapted to extend upon movement of the plunger head.

19 . The syringe assembly of claim 1 , further comprising an opening through a wall of the syringe barrel extending into the distal chamber adapted to provide air flow into the distal chamber upon movement of the plunger head toward the proximal end of the syringe barrel.

20 . The syringe assembly of claim 1 including a thumb pad portion adjacent the proximal end of the syringe barrel for accommodating the thumb of a user and at least one finger flange extending externally of the syringe barrel for accommodating the at least one forefinger of a user, the at least one finger flange adapted to cause movement of the plunger head within the syringe barrel and wherein the squeezing movement occurs between the user's thumb on the thumb pad portion and the user's forefinger on the at least one finger flange to cause the movement of the plunger head toward the proximal end of the syringe barrel.

21 . A syringe assembly having a reduced profile prior to use, comprising:
a syringe barrel having an inside surface defining a chamber, an open proximal end, and a distal end having an opening therethrough; a plunger assembly disposed at least partially within the syringe barrel, the plunger assembly comprising an elongate plunger rod and a plunger head disposed on the plunger rod and slidably disposed within the syringe barrel, the plunger head separating the chamber of the syringe barrel into a proximal chamber adjacent the proximal end and a distal chamber adjacent the distal end; and a conduit extending across the plunger head between the proximal chamber and the opening at the distal end of the syringe barrel, wherein the conduit is radially centered with respect to a general elongated axis of the syringe barrel, wherein the syringe assembly is adapted to contain a fluid in the proximal chamber, wherein the fluid contained within the proximal chamber is adapted to be expelled through the conduit and out of the opening at the distal end of the syringe barrel upon movement of the plunger head toward the proximal end of the syringe barrel, and wherein movement of the plunger head toward the proximal end of the syringe barrel occurs based on conventional operation of expelling fluid from a conventional syringe with a squeezing movement between a thumb and forefinger.

22 . The syringe assembly of claim 21 , wherein an external surface of the syringe barrel comprises notches or protrusions at predetermined increments adapted to interact with a corresponding flap extending from an interior perimeter of the actuator portion to provide an indication of movement of the plunger head within the syringe barrel.

23 . A syringe assembly having a reduced profile prior to use, comprising:
a syringe barrel having an inside surface defining a chamber, a first end, and a second end having an opening therethrough; an opening located at the first end, the opening being offset from a central axis of the syringe assembly; a vent located adjacent the second end; and a plunger assembly comprisin

Assignees

• Becton Dickinson France

Inventors

• Felsovalyi Flora
• Schiller Eric
• Quinn Michael

Classifications

• A61M5/31515 Primary

  Connection of piston with piston rod · CPC title

• A61M2005/31516

  reducing dead-space in the syringe barrel after delivery · CPC title

• A61M5/19

  having more than one chamber {, e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly (surgical glue applicators A61B17/00491)} · CPC title

• A61M5/3137 Primary

  Specially designed finger grip means, e.g. for easy manipulation of the syringe rod · CPC title

• A61M5/3148

  Means for causing or aiding aspiration or plunger retraction · CPC title