Syringe

Patent metadata

Field	Value
Publication number	US-9750884-B2
Application number	US-201514617783-A
Country	US
Kind code	B2
Filing date	Feb 9, 2015
Priority date	Jan 5, 2010
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A syringe is disclosed. The syringe may include a syringe body with a fluid chamber, the syringe body having a distal end and a proximal end, with an extrusion opening at the proximal end; a dividing wall disposed within the fluid chamber, defining a first fluid chamber and a second fluid chamber, the first fluid chamber and the second fluid chamber in communication with the extrusion opening; a first plunger disposed in a distal end of the first chamber, the first plunger including a first locking mechanism configured to prevent the first plunger from sliding away from the proximal end of the syringe body, when the first plunger is in a first initial position and the second plunger is being depressed; and a second plunger disposed in a distal end of the second chamber, the second plunger including a second locking mechanism configured to prevent the second plunger from sliding away from the proximal end of the syringe body when the second plunger is in a second initial position and the first plunger is being depressed.

First claim

We claim:

1. A syringe comprising:
a syringe body with a fluid chamber, the syringe body having a distal end and a proximal end, with an extrusion opening at the proximal end;
the fluid chamber in communication with the extrusion opening;
an outer plunger slidably disposed in the fluid chamber and including a slot; and
an inner plunger slidably disposed in the outer plunger;
wherein the inner plunger includes a first locking mechanism configured to prevent the inner plunger from sliding away from the proximal end of the syringe body, when the outer plunger is being depressed to eject a dermal filler from the fluid chamber;
the lock mechanism comprising a locking arm engaged with the slot of the outer plunger and a locking groove in the syringe body configured to engage the locking arm.

2. The syringe of claim 1 further comprising:
a second locking mechanism configured to prevent the outer plunger from sliding away from the proximal end of the syringe body, when the outer plunger is in a first position and the inner plunger is being depressed to eject a dermal filler from the fluid chamber.

3. The syringe of claim 1 wherein the outer plunger and the inner plunger share a common axis.

4. The syringe of claim 1 wherein the outer plunger includes two slots opposing one another, and the inner plunger includes two locking arms engaged with the slots.

Assignees

• Allergan Inc

Inventors

• Stroumpoulis Dimitrios
• Mudd Christopher S

Classifications

• A61M5/31596 Primary

  comprising means for injection of two or more media, e.g. by mixing · CPC title

• A61M5/3158

  performed by axially moving actuator operated by user, e.g. an injection button · CPC title

• A61M2005/31598

  having multiple telescopically sliding coaxial pistons encompassing volumes for components to be mixed · CPC title

• A61M5/31511

  Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence) · CPC title

• A61M2005/31508

  provided on the piston-rod · CPC title