US2251501A - Syringe ampoule - Google Patents

Description

Aug. 5, 1941.

A. E. SMITH SYRINGE AMPOULEI Filed May 22, 1959 I I I 5 INVENTOR. Arthur E. Smifh.

' AiTORN Patented Aug. 5, 1941 UNITED STATES PATENT OFFICE 'SYRINGE AMIOULE Arthur E. Smith, Lcs Angeles,jCalif. Application May 22, 1939. seam. 275,055

1 Claim.

This invention relates to syringe ampoules.

The general object of the invention is to provide an improved ampoule construction for use in a syringe.

A more specific object of the invention is to provide a novel cork for use in an ampoule.

A further object of the invention is to provide a novel one piece cork including a piston portion and a chamber for holding a drug.

Another object of the invention is to provide a cork having a chamber therein and having an integral hinged .trap door closure for the chamber. 7

Other objects and the advantages of this invention will be apparent from the following description-taken in connection with the accompanying drawing, wherein:

Fig. 1 is a central sectional View through an ampoule showing the features of my invention;

Fig. 2 is a section taken on line 22, Fig. 1;

Fig. 3 is a fragmentary side elevation of the ampoule shown in Fig. 1;

Fig. 4 is a fragmentary sectional view on an enlarged scale showing the trap door opened;

Fig. 5 is a view similar to Fig. 4 showing the piston cork moved to the front end of the ampoule; v

Fig. 6 is a View similar to Fig. 1 showing a modification;

Fig. 7 is a fragmentary side elevation of the ampoule shown in Fig. 6;

Fig. 8 is a fragmentary sectional view on an enlarged scale showing the trap door opened; and

Fig. 9 is a View similar to Fig. 8 showing the trap door opened and the piston moved to its forward position.

Referring to the drawing by reference characters I have shown my invention as embodied in an ampoule which is indicated generally at H). The ampoule is preferably a cylindrical glass tube having end faces which are arranged at right angles to the axis of the tube. In the ampoule I show a front cork H which as shown includes a body portion l2 having an inwardly extending skirt thereon forming a chamber M.

The chamber l4 communicates with the reduced chamber l5 which is closed by a diaphragm l6. The diaphragm I6 is spaced from the outer end of the cork I I and forms the inner wall of a small chamber l1.

At the rear end the ampoule includes a cork l8 comprising a rubber body having an end recess l9 which is closed by a thin diaphragm 20. The body includes a chamber 2! and an integral flap closure, or trap door, 22 which is integrally united to the body of the cork at one side as at 22' thus forming a hinge while the remainder of the trap door, as shown, is spaced from the edge 23 of the cork body. The periphery of the trap door 22 and of the body of the cork is cylindrical and both fit within the ampoule with the body of the cork slidable and forming a piston.

In Figs. 4 and 5 my improved device is shown as employed in a syringe barrel 23 which has a front needle 24 thereon adapted to pierce the diaphragm l6 and thus establish communication through the needle with the interior of the ampoule. The barrel also includes a plunger 25 having a head 26 thereon which slides within the ampoule and forces the cork l8 forward. The head 26 includes a projecting portion 21 which fits in the recess l9 and includes a rod 29 which pierces the diaphragm 29 and advances with the plunger and shifts the trap door to the position shown in Figs. 4 and 5.

In Fig. 4 the plunger rod 29 has just dislodged the trap door 22while in Fig. 5 the plunger is advanced and has moved the outer cork l8 forward thus forcing the contents from the ampoule;

My invention is particularly adapted for the preparation of fresh solutions and in doing this the ampoule includes preferably a liquid vehicle 29 disposed in the ampoule and a medicinal preparation 30 which is disposed in the chamber 2|. When the trap door 22 is moved the liquid 29 is allowed to mingle with the medicinal preparation 30 thus forming a fresh solution.

In Figs. 6 to 9, inclusive, I show a modification of my invention which is indicated generally at 4'0. In the modification the ampoule 4| includes a rear cork 42 having a recess 43 therein for the reception of the end of a plunger. The cork 42 also includes a lower recess 44 with a diaphragm 45 between the recess 43 and 44.

At its front end the ampoule includes a cork 46 having an end flange 46' and having a recess 41 with a diaphragm 48 closing the inner end of the recess. The cork 46 further includes an inwardly extending tongue 49 integral with the front portion of the cork and integral with the tongue 49 I show a trap door 50 which is cylindrical and Which fits the interior of the ampoule to produce a tight seal. The trap door 50 is spaced from the front portion of the cork to provide a chamber 5| in which a medicinal preparation 52 is arranged.

The ampoule shown in Figs. 6 to 9, inclusive, is adapted to be used in a syringe which includes the front member the tube strikes and shifts 10 the trap door 5&1 thus allowing the medicinal preparation 52 to mingle with the fluid vehicle 60 in the ampoule thus enabling a fresh solution to be prepared for injection.

From the foregoing description it will be apparent that I have invented a novel ampoule and cork construction which is simple in construction and highly efficient for its intended purpose.

Having thus described my invention, I claim:

In an ampoule for use in a hypodermic syringe, a cylindrical glass body having a stopper at one end thereof, a second stopper in the body at the other end thereof, said second stopper including a body portion having a recess therein at the outer end thereof, a diaphragm forming the inner wall of said recess, said body having a chamber therein, said diaphragm forming the outer wall of said chamber and a trap door integral with the Wall of said chamber, said trap door being cylindrical and having its periphery sealingly engaging the interior of said ampoule and a medicinal preparation in said 15 chamber.

ARTHUR E. SMITH.

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