US2666434A - Disposable syringe - Google Patents

Description

Jan. 19, 1954 R. w. OGLE DISPQSABLE SYRINGE Filed NOV. `17, 1950 ffl ffl/ll Il l,

INVENTOR Patented Jan. 19, 1954 DISPOSABLE SYRINGE Robert W. (igle, Pasadena, Calif.

Application November 17, 1950, Serial No. 196,198

- feasible to sell a syringe filled with a single Vdose or iniection thus permitting the device to be discarded after a single use. n

It is a further object of this invention to provide a unitary structure consisting of a syringe i body, syringe plunger, needle, cork and vial, which when assembled and lled, is in the condition to be furnished to the medical profession and it is a feature of this assembly7 that as so assembled and sold the iiuid will be displaced initially upon one side oi the body and the plungn er upon the other.

It is another object of this invention to pro vide such an assembly which in the condition furnished to the medical profession has the needle entirely protected and sealed against contamination and it is a feature of this assembly that a long hollow cork is provided for the vial which serves not only to close the vial prior .to use but to seal off the needle thus protecting the needle against destruction and also contamination.

It is another object of this invention to provide a syringe of the type described which can be aspirated and in which the plunger can be 1 manipulated prior to use, iirst to llfthe body of the Vsyringe with the injectable fluid, and second to remove all air bubbles.

It is a further object of this invention to provide a syringe of the type described in combination with a vial for the purpose of providing a prepared package containing in the bodyoi the syringe a powdered medicament and in the vial a diluent for the powder, each of which is sealed against contamination or intermixture, but in which means is provided for opening communication between the syringe body an-d vial, when ready for use, for thorough mixture of the diluent and the powdered medicament.

It is a further object of this invention to provide a syringe and vial as set forth in the preceding paragraph in which the vial and syringe body remain sealed after such communication is established to prevent contamination and yet permit `working of the diluent back and forth 3 Claims. (Cl. 12S-218) from vial to syringe body for thorough mixing. These and other objects, features and advantages of the present invention will be apparent from the annexed specication in which:

- Figure 1 is a vertical section of a syringe embodying the present invention shown in its initial or assembled position.

Figure 2 is a View similar to Figure l of the syringe shown in its position just prior to filling the body of the syringe with the injectable fluid.

Figure 3 is a side view of the device shown in the position occupied when the fluid is drawn into the body.

Figure 4 is an enlarged fragmentary vertical section of the lower end of the device in position similar to that shown in Figure 3.

Figure 5 is a fragmentary section showing an alternative embodiment of the lower end of the plunger.

Figure 6 is a section on line 5 6 of Figure 1.

Figure 7 is an explo-ded view of the parts in elevation.

Referring now more particularly to the drawings, the syringe is shown as comprising a body member lll, a plunger Il, a vial l2 and a hollow cork or plug I3. The body l0 is cylindrical in form and is provided with a liange it at its upper end and a tapered bottom l. A hollow needle I6 is centrally disposed in the lower end of the body l 0 which is conventional in form and provided with a tapered opening il. The upper end of the needle I6 terminates at the lowest point of the tapered bottom i5 as clearly shown in the figures.

The body lil has a reduced portion E il forming a hub and from the shoulder thus formed one or more pins 29 depend. The reduced portion iii adjacent the shoulder is slightly enlarged, shown as exaggerated at ma for a purpose hereinai ter dascribed.

'Ifne plunger l l -is cylindrical in form and so dimensioned as to have a small clearance with the interior of the body It?. The plunger il is hollow through the major portion of its length and its upper end is provided with a :lange 2l Adjacent the iiange 2l the walls of the plunger are tapered as at 22 to limit the distance to which the plunger il can be inserted into the body i@ and also to form a fluid and airtight seal with the upper end of the body lil. The lower end oi the plunger, in the embodiment shown in Figures l through 3, is provided with a central bore 23 to receive the post 2s of a sealing member 25. A The sealing member 25 is generally cylindrical in form but is provided with an annular groove 26 V-shaped in cross secwith an outer diameter in the order of twenty thousandths (20,000ths) larger than the interior diameter of the body member In in order to insure that the sealing member will remain pressure tight within the body. This feature plus the general assembly of the device enables the operator to work the plunger Il back and forth within the body I6 as many times as desired after the needle i6 has pierced the Wall 34 for mixing and agitation of the iluid.

While there has been described what is at present considered a preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modications can be made therein without departing from the essence of the invention and it is intended to cover herein all such changes and modifications as come within the true spirit and scope of the appended claims.

I claim:

1. A syringe comprising: a hollow body member provided with ahub; a plunger normally received within said body member; a hollow needle extending from the end of said body member and said hub and communicating with the interior of said body member; a vial; and a hollow plug for closing said vial; said plug being normally disposed upon said hub and surrounding said needle having walls forming an elongated cavity having a length substantially equal to but slightly less than the combined length of the free portion of said needle and of said hub; said body member having a portion normally received in said elongated opening in said hollow plug; said vial being disposed upon the plug at the opposite end of said body from said plunger; said body member in one position being adapted to be depressed further into said hollow plug to cause said needle to pierce a wall of said plug and communicate with the interior of said vial.

2. A device as set forth in claim 1 in which said needle in wall piercing position extends through the pierced wall suiiiciently to permit withdrawal of uid from said vial into said body but insuiiciently to permit the opening in said needle to pass completely through said wall.

3. A device as set forth in claim 2 in which said hollow body and said plug are provided with correlative members adapted to prevent movement into wall piercing position until said members are properly aligned.

ROBERT W. OGLE.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,456,717 Smith et al May 29, 1923 1,471,644 Bandrnan Oct. 23, 1923 1,987,146 Hein Jan. 8, 1935 2,326,490 Perelson Aug. 10, 1943 2,419,401 Hinds Apr. 22, 1947 FOREIGN PATENTS Number Country Date 632,883 Germany July 15, 1936

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