Sequential delivery syringe

• US 6,723,074 B1
• Filed: 04/09/2002
• Issued: 04/20/2004
• Est. Priority Date: 04/09/2002
• Status: Expired due to Fees

• Current Assignee: Thor R. Halseth
• Original Assignee: Thor R. Halseth
• Inventors: Halseth, Thor R.
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Thissell, Jeremy
• Application Number:
  US10/119,669
• Time in Patent Office: 742 Days
• Field of Search: 604/200, 604/81, 604/191, 604/201, 604/203, 604/204, 604/206
• US Class Current: 604/201
• CPC Class Codes: A61M 2005/1787 Syringes for sequential delivery of fluids, e.g. first medicament and then flushing liquid
• CPC Class Codes: A61M 5/282 by compression of deformable ampoule or carpule wall
• CPC Class Codes: A61M 5/284 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/286 upon internal pressure increase, e.g. pierced or burst A61M5/283 takes precedence
• CPC Class Codes: A61M 5/31513 Piston constructions to improve sealing or sliding
• CPC Class Codes: A61M 5/3291 Shafts with additional lateral openings
• CPC Class Codes: A61M 5/344 using additional parts, e.g. clamping rings or collets
• CPC Class Codes: A61M 5/345 Adaptors positioned between needle hub and syringe nozzle
• CPC Class Codes: A61M 5/347 rotatable, e.g. bayonet or screw A61M5/344 takes precedence

Abstract

A sequential delivery syringe which has an internal chamber located within a body with the internal chamber being substantially closed at one end except for a discharge opening and totally open at the opposite end. A luer is connected to the discharge opening with the luer including a piercing member. A mid-piston is movably mounted within the internal chamber of the syringe with there also being a separate stopper piston which is connected to plunger. Between the stopper piston and the mid-piston is mounted a collapsible structure within which is an internal chamber. A liquid is to be contained within this internal chamber of the collapsible structure. Movement of the plunger and stopper piston toward the mid-piston will result in discharging any liquid contents which is located between the mid-piston and the closed end of the body, and upon the mid-piston being located directly adjacent the closed end, the mid-piston will be pierced which will permit the liquid that is contained within the collapsible structure to be discharged through the discharge passage following the discharge of the liquid which was contained within the syringe body and located between the mid-piston and the closed end.

Claims

1. A sequential delivery syringe comprising:

a body having an internal chamber, said body substantially closing said internal chamber at one end and being opened at an opposite end of said internal chamber;

a piercing member mounted on said one end, said piercing member extending within said internal chamber;

a mid-piston movably mounted within said internal chamber, said mid-piston dividing said internal chamber into a front section and a rear section;

a stopper piston mounted within said rear section, said stopper piston being attached to a plunger, said plunger being located within said opposite end of said internal chamber and extending exteriorly of said body;

means for collapsing mounted in said rear section, a first liquid to be contained within said means, said means being normally closed;

a second liquid to be contained within said front section, whereby upon movement of said plunger and said stopper piston toward said one end said second liquid to be discharged through said discharge passage until said mid-piston is penetrated by said piercing member which provides access into said means for collapsing and permits said first liquid to be discharged through said discharge passage;

a luer lock mounted on said one end, said luer lock having a collar which surrounds an internal annular chamber, a tapered male luer mounted to said collar and extending within said internal annular chamber, said tapered male luer being centrally mounted within said annular chamber; and

said collar having a plurality of holes through which both said first liquid and said second liquid is to flow into said discharge passage.

2. The sequential delivery syringe as defined in claim 1 wherein:

said holes surround said piercing member.

3. A sequential delivery syringe comprising:

a body having an internal chamber, said body substantially closing said internal chamber at one end and being opened at an opposite end of said internal chamber;

a piercing member mounted on said one end, said piercing member extending within said internal chamber;

a mid-piston movably mounted within said internal chamber, said mid-piston dividing said internal chamber into a front section and a rear section;

a stopper piston mounted within said rear section, said stopper piston being attached to a plunger, said plunger being located within said opposite end of said internal chamber and extending exteriorly of said body;

means for collapsing mounted in said rear section, a first liquid to be contained within said means, said means being normally closed;

a second liquid to be contained within said front section, whereby upon movement of said plunger and said stopper piston toward said one end said second liquid to be discharged through said discharge passage until said mid-piston is penetrated by said piercing member which provides access into said means for collapsing and permits said first liquid to be discharged through said discharge passage; and

said stopper piston including an air discharge valve, moving of said stopper piston and said plunger toward said mid-piston will cause air within said rear section to be discharged through said air discharge valve, moving of said stopper piston and said plunger away from said mid-piston will cause said air discharge valve to be closed.

4. The sequential delivery syringe as defined in claim 3 wherein:

said air discharge valve comprising a series of deflectable rings mounted on said stopper piston.

5. A sequential delivery syringe comprising:

a body having an internal chamber, said body substantially closing said internal chamber at one end and being opened at an opposite end of said internal chamber;

a piercing member mounted on said one end, said piercing member extending within said internal chamber;

a mid-piston movably mounted within said internal chamber, said mid-piston dividing said internal chamber into a front section and a rear section;

a stopper piston mounted within said rear section, said stopper piston being attached to a plunger, said plunger being located within said opposite end of said internal chamber and extending exteriorly of said body;

means for collapsing mounted in said rear section, a first liquid to be contained within said means, said means being normally closed;

a second liquid to be contained within said front section, whereby upon movement of said plunger and said stopper piston toward said one end said second liquid to be discharged through said discharge passage until said mid-piston is penetrated by said piercing member which provides access into said means for collapsing and permits said first liquid to be discharged through said discharge passage; and

said piercing member being mounted on a disc, said disc having a concave front surface and a convex rear surface, said disc being placeable within said internal chamber with said convex rear surface to be located directly adjacent said one end.