US2305278A - Syringe construction - Google Patents

Description

Dec. 15, 1942. A, E. sMlTH SYR'INGE CONSTRUCTION Filed May 5, 1939 Patented Dec. 15, 1942 UNITED STATES PATENT OFFICE 2,305,278 sYmNGE CONSTRUCTION Arthur E. smith, Los Ange-les, Calif.

Application May 5, 1939, Serial No. 271,887 1 claim. Y(c1. 12s-272) 'I'his invention relates to syringes.

The general object of the invention is to provide a novel ampule syringe which is particularly adapted to provide fresh solution for injection.

A more specific object of the invention is to provide a novel syringe barrel.

A further object of the invention is to provide a novel plunger construction for an ampule syringe.

Another object of the invention is to provide a novel ampule for a syringe.

A further object of the invention is to provide a novel stopper for use in a syringe ampule.

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 showing a syringe embodying the features of my invention;

Fig. 2 is an end view of the rear member of the syringe;

1 Fig. 3 is an enlarged fragmentary central sectional view showing the ampule;

Fig. 4 is a view similar to Fig. 3 showing the parts in another position;

Fig. 5 is a view similar to Fig. 4 on a reduced scale showing the parts in another position;

Fig. 6 is a fragmentary sectional view on a reduced scale showing a modification; and

Fig. 7 is an enlarged fragmentary sectional View showing a further modification.

Referring to the drawing by reference characters I have shown my invention as embodied in a syringe which is indicated generally at I0.

As shown the syringe includes a barrel I I having a rear member I2 thereon and having a front member I3. The front member I3 is provided with an aperture which receives a needle I4 the inner end I5 of which projects into the barrel.

'I'he rear member includes a telescopic section I6 having a head |1 thereon which is normally urged in one direction by a spring I8 which surrounds a plunger rod I9. The plunger rod I9 has a ange 2U thereon. The head I1 is provided with a needle or piercing member 2| which lis arranged at one side of the axis of the head and plunger and which slides in a groove 22 in the plunger. The flange includes a depending collar 23 and this collar as well as the flange 2D are notched to receive the needle 2|.

Within the syringe barrel I provide an ampule 24 which may be made of glass and which includes a front resilient cork 25 having an inner chamber 26 and an outer chamber 21 with a diaphragm 28 separating the chambers and adapted to be punctured by the end I5 of the needle to allow the contents of the ampule to be discharged from the syringe.

At its rear end the ampule includes a cork 29 having a recess 3|) therein with the diaphragm 3| closing the lower end of the recess. The cork 29 is preferably spaced near the rear end of the ampule and below the diaphragm 3| I show another cork or disk 33 which is so spaced that it provides a chamber 34 for a medicinal preparation 35.

All the corks are preferably made of rubber or a similar material so that they form a hermetic closure.

In use the ampule is placed in the syringe after which the rear member I2 may be turned so that the threads thereon engage the threads on the barrel to hold the rear member in place.

The head I1 on the rear member thus engages the end of the ampule while the needle point I5 passes through the diaphragm 28 into the ampule. As the head I1 moves forward the needle 2| thereon engages the cork 33 at one side of its center as shown in Fig. 4 and tilts this cork allowing the liquid contents in the main part of the ampule to communicate with the area between the corks 29 and33 so thatthe ingredients may mix to form a fresh solution.

After the ingredients are mixed, pressure on the plunger causes the flange 20 thereon to move the corks 29 and 33 downwardly leaving the needle-2| and allowing the hole produced by the needle to be closed. In this way the contents of the ampulevare ejected.

The recess and the cork 29 allow the needle 2| to enter at any location about the periphery of this recess.

In Fig. 6 I show a modification wherein a cork 29 which is similar to the cork 29 is used in conjunction with a cork 33' similar to the cork 33. A medicinal compound 35 is disposed between the corks. The cork 29 differs from the cork 29 in that the former includes a central portion which is integral with the body of the cork. The use of the ampule shown in Fig. 6 is similar to that previously described. v

In Fig. 7 I show a further modification of the invention wherein the front member 5| of the syringe includes a tapered recess 52 to receive the tapered front end 53 of an ampule 54. A gasket 55 serves to maintain the parts in sealing relation. At its upper end the ampule 54 includes a cork 56 having a recess 51 and 5B at the opposite ends, the recess 51 being separated by a diaphragm 59. A second cork or disk 60 closes the lower end of the recess`58. A medicinal preparation Bl is contained in the chamber afforded by the recess 58.

In use the ampule 54 is inserted in the syringe aspreviously described and the syringe rear member which is similar in all respects to the rear member I2 is employed. The needle on this rear member pierces the diaphragm 59 and engages `the disk 60 at one side of its center to unseat the disk and allow the preparation El to pass into the vehicle.

From the foregoing description it will be apparent that I have invented a novel syringe and ampule which are highly efiicient for the intended purpose.

Having thus described my invention, I claim:

In an ampule, a body cylindrical throughout and having a cork therein at one end thereof, said cork including a thin portion adapted to be punctured by a needle, a second cork in the other end of said ampule, each of said corks sealingly engaging the ampule Wall, said second cork having an outwardly opening aperture therein adapted to receive a piercing member and having a diaphragm closing the inner end of said aperture and puncturable by a piercing member passing through said aperture, a third cork in said ampule sealingly engaging the ampule Wall, said third cork comprising a thin, tiltable disk and being spaced from the second cork to form a chamber, a medicinal preparation in said chamber, each of said corks being cylindrical, and a solvent for the medicinal preparation in the ampule between the rst and third corks, said second cork being slidable in the ampule and means to prevent inward movement of the rst cork in the ampule.

ARTHUR E. SMITH.

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