Syringe usable as container for storage and preservation of injection fluid

• US 3,902,491 A
• Filed: 04/22/1974
• Issued: 09/02/1975
• Est. Priority Date: 04/27/1973
• Status: Expired due to Term

• Current Assignee: Pierre Lajus
• Original Assignee: Pierre Lajus
• Inventors: Lajus, Pierre
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): McGowan, J. C.
• Application Number:
  US05/462,767
• Time in Patent Office: 498 Days
• Field of Search: 128/218R,218D,218P,218M,218PA,218A,215,234,235,261,272 206/365-368,437,438,219-223,498 215/257,250 222/386
• US Class Current: 604/221
• CPC Class Codes: A61M 2005/3121 via the proximal end of a syringe, i.e. syringe end opposite to needle cannula mounting end
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/31513 Piston constructions to improve sealing or sliding

Abstract

A syringe which may be used for storage and preservation of injection fluid includes a hollow cylindrical body which has an outlet end and an inlet end. A rupturable member is provided at the outlet end. A flange is provided at the inlet end. A sealing member, which is desirably a fluid-impermeable membrane, is fixed to the flange to seal the inlet end. A rod is provided on which a piston is connected. The piston is positionable, with respect to the cylindrical body, for entering its interior, rupturing the sealing member and moving toward its outlet end. As a result, the injection fluid stored and preserved within the hollow cylinder may be removed via the outlet end by the piston under the influence of the rod.

Claims

1. A syringe which may be used for storage and preservation of injection fluid comprising, in combination:

a. a hollow, cylindrical body having an outlet end and an inlet end;

b. a rupturable member at said outlet end;

c. means defining a sealing surface at said inlet end;

d. a sealing member which is fixed to said sealing surface to seal said inlet end;

e. rod means; and

f. a piston connected to said rod means and movably positioned within said hollow cylindrical body for rupturing said sealing member and moving toward said outlet end; and

wherein said rod means is separable from said piston; and

further including means for holding said piston separately from said rod means, within said hollow, cylindrical body;

whereby injection fluid stored and preserved within the hollow cylinder may be removed via the outlet end by the piston under the influence of the rod means.

2. A syringe according to claim 1, wherein said sealing surface is a surface of a first flange facing axially away from said hollow, cylindrical body;

said sealing member is in the form of a hollow member having a substantially conical closed first end, said sealing member surrounding a portion of said piston, being inserted between said piston and the interior wall of said body and having a second end in the form of a second flange located exteriorly of said body, said second flange being joined to said first flange.

3. A syringe according to claim 2, further including a second sealing member covering the rear of said piston, said second sealing member being joined to said first flange via said second flange so as to hold said piston within said body.

4. A syringe according to claim 2, wherein said sealing member is provided with a rupture region defined by a thickness reduction therein substantially adjacent said first flange.

5. A syringe which may be used for storage and preservation of injection fluid comprising, in combination:

a. a hollow, cylindrical body having an outlet end and an inlet end;

b. a rupturable member at said outlet end;

c. means defining a seAling surface at said inlet end;

d. a sealing member which is fixed to said sealing surface to seal said inlet end;

e. rod means; and

f. a piston connected to said rod means and movably positioned with respect to said hollow cylindrical body for entering its interior, rupturing said sealing member and moving toward said outlet end;

wherein said sealing surface is a surface of a first flange facing axially away from said hollow, cylindrical body; and

wherein said sealing member is composed of a member which intimately, adhesively adheres to a portion of said piston, said portion being located within the interior of said body, said sealing member having a free portion in form of a second flange, and said first flange being joined to said second flange in a fluid-tight manner whereby injection fluid stored and preserved within the hollow cylinder may be removed via the outlet end by the piston under the influence of the rod means.

6. A syringe which may be used for storage and preservation of injection fluid comprising, in combination:

a. a hollow, cylindrical body having an outlet end and an inlet end;

b. a rupturable member at said outlet end;

c. means defining a sealing surface at said inlet end;

d. a sealing member which is fixed to said sealing surface to seal said inlet end;

e. rod means; and

f. a piston connected to said rod means and movably positioned with respect to said hollow cylindrical body for entering its interior, rupturing said sealing member and moving toward said outlet end;

wherein said sealing surface is a surface of a first flange facing axially away from said hollow, cylindrical body;

wherein said sealing member and said piston are one and the same member, this member being of a material suitable for prolonged contact with the stored fluid within said body and being provided with a second flange which is joined to said first flange to provide a sealed fluid-tight closure for said body; and

wherein said second flange is provided, at its joint with that portion of said sealing member constituting said piston, with a region of reduced thickness constituting a rupture area whereby injection fluid stored and preserved within the hollow cylinder may be removed via the outlet end by the piston under the influence of the rod means.

7. A syringe according to claim 6, wherein said rod means includes a tip portion having an enlargement having a diameter which is substantially equal to the outer diameter of that portion of said sealing member constituting said piston;

and said enlargement, at its end facing said body is terminated by a sharply angled edge forming a circular blade which permits cutting between said second flange and that portion of said sealing member constituting said piston when said tip is pushed into the interior of said body.