Syringe having pivoting arm plunger rod

Patent metadata

Field	Value
Publication number	US-12533470-B2
Application number	US-202117331438-A
Country	US
Kind code	B2
Filing date	May 26, 2021
Priority date	Sep 30, 2011
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A syringe assembly includes a syringe barrel having a first end, a second end, and a sidewall extending between the first end and the second end. The syringe assembly further includes a stopper disposed within a chamber of the syringe barrel, a plunger adapter engaged with the stopper, and a plunger rod having first and second ends. The first end of the plunger rod is pivotally secured to the plunger adapter. The plunger rod has a pre-use position where the second end of the plunger rod is positioned adjacent to the syringe barrel, and a use position where the plunger rod is configured to displace the stopper relative to the syringe barrel. A recessed portion of the plunger adapter receives a portion of the first end of the plunger rod when the plunger rod is in the pre-use position and the use position.

First claim

What is claimed is:

1 . A syringe assembly comprising:
a syringe barrel having a first end, a second end, and a sidewall extending between the first end and the second end, the sidewall defining a chamber; a stopper disposed within the chamber of the syringe barrel; a plunger adapter engaged with the stopper, the plunger adapter defining a recessed portion therein, wherein the recessed portion defines a first area and a second area, wherein the first area has a shape different than that of the second area; and a plunger rod having a first end having an extension extending perpendicular with respect to the first end, a second end having a thumb press located adjacent thereto, and an elongate body extending between the first and second ends, the elongate body defining a cross-section having a constant shape extending an entire length of the plunger rod between and including the first and second ends, wherein the first end has a shape that is the same as the cross-section of the elongate body, the first end of the plunger rod pivotally secured to the plunger adapter about a pivot axis, the plunger rod having a pre-use position wherein the second end of the plunger rod is positioned adjacent to the syringe barrel, and a use position wherein the plunger rod is configured to displace the stopper relative to the syringe barrel, wherein, in the use position, the first end and the extension are configured to be received within the second area of the recessed portion to provide multiple surfaces of engagement parallel to the pivot axis and engaging an outer perimeter of the first end.

2 . The syringe assembly of claim 1 , wherein the stopper and the plunger adapter are co-formed.

3 . The syringe assembly of claim 1 , wherein the syringe barrel defines a longitudinal axis extending in a longitudinal direction through the chamber, the plunger rod substantially parallel to the longitudinal axis of the syringe barrel when the plunger rod is in the pre-use position and substantially aligned along the longitudinal axis of the syringe barrel when the plunger rod is in the use position.

4 . The syringe assembly of claim 3 , wherein the second end of the plunger rod engages and receives a portion of the syringe barrel when the plunger rod is in the pre-use position.

5 . The syringe assembly of claim 1 , wherein the first end of the plunger rod includes one of a receiver or an engagement, wherein the receiver or the engagement is pivotally secured to the other of the receiver or the engagement that is positioned within the recessed portion of the plunger adapter.

6 . The syringe assembly of claim 5 , wherein the receiver is positioned on the extended portion of the first end of the plunger rod and the engagement is positioned within the recessed portion of the plunger adapter.

7 . The syringe assembly of claim 6 , wherein the receiver comprises an opening corresponding to the extended portion of the first end of the plunger rod, and wherein the engagement comprises a pin-shaped member configured to be received by the receiver of the plunger rod.

8 . The syringe assembly of claim 7 , wherein at least a portion of the elongate body of the plunger rod is generally T-shaped in a cross-sectional plane perpendicular to a longitudinal axis of the elongate body, wherein the recessed portion of the plunger adapter is configured to receive a portion of the elongate body of the plunger rod in the use position.

9 . The syringe assembly of claim 8 , wherein the recessed portion of the plunger adapter is generally cross-shaped in a cross-sectional plane perpendicular to the longitudinal axis of the elongate body, wherein the second area is configured to receive the generally T-shaped cross-section of the elongate body of the plunger rod.

10 . The syringe assembly of claim 1 , wherein the first end of the plunger rod is pivotally secured to the plunger adapter at a position spaced radially inward from an external surface of the plunger adapter.

11 . A syringe assembly comprising:
a syringe barrel having a first end, a second end, and a sidewall extending between the first end and the second end, the sidewall defining a chamber; a stopper; a plunger adapter engaged with the stopper, at least a portion of the stopper positioned within the chamber of the syringe barrel, the plunger adapter defining a recessed portion therein, wherein the recessed portion defines a first area and a second area, wherein the first area takes a shape different than that of the second area; and a plunger rod having a first end pivotally secured to the plunger adapter about a pivot axis, a second end comprising a thumb press having a recessed portion configured to conform to an external surface of the syringe barrel, and an elongate body extending between the first and second ends and defining a cross-section having a constant shape extending an entire length of the plunger rod between the first and second ends, wherein the first end has a shape that is the same as the cross-section of the elongate body, wherein the plunger rod has a pre-use position wherein the second end of the plunger rod is positioned adjacent to the syringe barrel, and a use position wherein the second end of the plunger rod is spaced from the syringe barrel along a longitudinal axis of the syringe barrel, wherein, in the use position, the first end is configured to cooperate within the second area of the recessed portion in the plunger adapter to provide multiple surfaces of engagement parallel to the pivot axis and engaging an outer perimeter of the first end.

12 . The syringe assembly of claim 11 , wherein the stopper and the plunger adapter are co-formed.

13 . The syringe assembly of claim 11 , further comprising a luer lock positioned adjacent to the first end of the syringe barrel.

14 . The syringe assembly of claim 13 , further comprising a cap assembly engaged with the luer lock, the cap assembly comprising a cap body and a seal.

15 . The syringe assembly of claim 11 , wherein the longitudinal axis extends in a longitudinal direction through the chamber, the plunger rod substantially parallel to the longitudinal axis of the syringe barrel when the plunger rod is in the pre-use position and substantially aligned along the longitudinal axis of the syringe barrel when the plunger rod is in the use position.

16 . The syringe assembly of claim 15 , wherein the second end of the plunger rod engages and receives a portion of the syringe barrel when the plunger rod is in the pre-use position.

17 . The syringe assembly of claim 11 , wherein the second end of the plunger rod engages and receives a portion of the syringe barrel when the plunger rod is in the pre-use position.

18 . The syringe assembly of claim 11 , wherein the first end of the plunger rod includes one of a receiver or an engagement, wherein the receiver or the engagement is pivotally secured to the other of the receiver or the engagement, wherein the other of the receiver or the engagement is positioned within the recessed portion of the plunger adapter.

19 . The syringe assembly of claim 11 , wherein the plunger adapter comprises a stopper engaging portion secured to the stopper and a plunger interface portion secured to the first end of the plunger rod, and wherein the first end of the plunger rod includes one of a receiver and an engagement pivotally secured to the other of the receiver and the engagement positioned on the plunger interface portion of the plunger adapter.

20 . The syringe assembly of clai

Assignees

• Becton Dickinson France Sas

Inventors

• Manke Darrin Scott
• Labak Christopher
• St Cyr Joseph Omer

Classifications

• A61M2005/31518

  designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members · CPC title

• A61M5/31515

  Connection of piston with piston rod · CPC title

• A61M2005/3121

  via the proximal end of a syringe, i.e. syringe end opposite to needle cannula mounting end · CPC title

• A61M2005/3118

  via the distal end of a syringe, i.e. syringe end for mounting a needle cannula · CPC title

• A61M2005/3104

  Caps for syringes without needle · CPC title