US938951A - Hypodermic syringe. - Google Patents

Description

F. D. BELL.

' HYPODERMIC SYRINGE. APPLICATION FILED APR. so, 1909.

Patented Nov. .2,v 1909.

Vl, l W

FREDERIC D. BELL, OF GLEN RIDGE, NEW JERSEY.

HYPODERMIICy SYRIN z Specification of Letters Patent.

Application med Aprii so, 1909. serial No. 493,203.

To all whom it may concern:

Be it known that I, FREDERIC D. BELL, a citizen ofthe United States, residing at Glen Ridge, in the county ofl Essen and' State of lew Jersey, have invented newl and useful Improvements in Hypodermic cation.

My invention relates .to hypodermic syringes adapted to be used in administering antitoxin or other serums, and serving also as containers for measured doses of the serums between the time when it is put up atthe laboratory and that of-use or administration; and the invention has for its object to improve devices of this character particularly as to the hermetic sealing of the container so that the charge it contains may be preserved indefinitely in an aseptic condition and free from contamination from the air or any other Way.'

In the accompanying drawings*Figure l is an elevation of a syringe and container embodying my invention, the container'being hermet-ically sealed and the parts having Syringes, of which the following is a specivthe positions they `occupy until the time comes for administering the chargeof the *Y container. Fig. 2 is lacentral longitudinal section, the parts occupying the positions represented in Fig. 1.. Fig. 3 is a longitudinal section of the needle end of the syringe illustrating the method of rupturing the film .that hermetically closes -the vcontainer and piston barrel at that end.

In the drawings A designates the serum receptacle or container which is represented as being formed of a glass tube, one end of which 1s provided with a neck a and the other end with an outward extending flange a adapted to be grasped by the fingers of the physician when making an l injection, Within this cylinder is mounted a piston or plunger B which is operated by a stem C which may be integral with the plunger oi separate therefrom, as desired. T-he open end of the cylinder A may, if desired, be closed bya stopper surrounding the stem C, such as a mass of paraffin, D, which hermetically closes the Vcontainer and syringe barrel at this end.

vVVhileI have illustrated and described a plunger syringe I do not thereby wish to be understood as limitingmy invention in its useful applications to a syringe of this character, as the latter is chosen merely to illustrate one well known-form of syringe to which my inventionnay be applied.

The neck of the container A is closed by a stopper 2, preferably formed of soft rubber. p Extendingv longitudinally through this stopper is an aperture 3,v preferably formed at the time they stopper is made, and extending from end to end thereof. l{Into this aperture is inserted the stem et of the hypodermic needle. v

The needle proper is designated 5 and is provided with an enlargementbi that separates the needle from the stenieand serves as a hub by which the needlecan be conveniently handled in forcing :the stem l into the aperture through the stopper. The end of the stem of the needle is preferably provided with a bulbous -enlargenlient which is forced into the, body of lthe niaterial constituting the stopper as thejflatter is compressed aboutI the stem of the needle on being forced into the, neck of the container A, thus insuring a Huid-tight conrattea Nov. e, 1909.

nection at this point. The length of the stem '4 of the needle is a trifle less than'the of the stem of the needle, Which it will be understood is perforated as is also tl'ieneedle proper, lies close toithe inner end of the stopper. A communication between' the-.hollow hypodermic needle and the interior of the container and piston barrel is thus tablished so longhas `the passage 3 through the stopper remains open at its inner end.

I provide, however,'for closing the innerenel1 of the passage 3 through the stopper and thus for sealing the needle end-of the container whenever the stopper is inserted.-

95. This I accomplish by coating the reduced vio comin a part thereof and closing the inner` the same, may -be applied either before orafter the needle end o the passage'through is inserted into the stopper, since the needle -does not interfere .with it as the stem does.

not extend beyond the end of the stopper,

. as has been stated, and hence does iiot come intov engagement with the closing film,

"though it liesin close proximity thereto.

. applied to the container.

The stopper which I have described is a' unitary structure permitting it to be manufactured as acomplete article which can be readily'inserted into or removed from the neck of the container. It 'constitutes sufficiently-firm seat for the needle, which is ordinarily inserted into the stopper, as illustrated in the'drawings, before the'latter is 9 indicates a wire such as is commonly inserted into the bore of a hypodermic needle for protecting it from the entrance of foreign substances. It is of a length somewhat greater than the combined length of the needle proper andthe stem 4 thereof. lVhen the tube is charged and sealed as indicated in F ig. l, the wire is inserted lintoY the needle and occupies the position there illusLA trated, that isv to say, its inner end is contiguous to, but not in contact with, film 8 covering the end of the opening 3. When it is desired to administer the charge carried by the syringe the wire is first pressed inward until'its end ruptures'the film 8, when it is withdrawn, leaving a passage between the interior of the container or cylinder of the syringe and the bore of the needle. Y

As some little force is required to rup-' ture the film the wire 9 is liable to move forward rapidly the instant the end p-unctui'es the film, with the result that the tingersqof the person operating the wire .will come y forcibly into contact with .the point of the needle, which is not onlyv unpleasant',` but may result in contaminating the needle: I therefore'inount upiin the .wire 9 near its outer end a small piece of softv material capable of being thoroughly, and practically sterilized. This is indicated at 10. ',It serves to protect the person from danger of injury by the needle when ruptiiring the seal or film 8, Aand protects the needle from contamination by reason of the fingers of the" operator coming into contact with the point thereof.

and becomes a part thereof.

vapplied intimately It will be seen from this disclosure of my invention, that I provide a simple means for liermetically closing the needle end of a syringe and container and also provide for easily breaking the seal without, however7 necessitating the handling of the needle, or in any way disturbing the closing. parts of the container and syringe so that the serum or other material contained could possibly be subject to outside contamination.

` What I claim is 1. In ai hypodermic syringe, the combination of-a perforated stopper adapted as a whole to be applied to or removed from the neck of a serum-containing receptacle, a hypodermic needle having a stein adapted to fit the perforationl in the stopper, and a seal for closing tliesaidperforation exteriorly applied to the inner end of the stopper and adhering thereto and constitu-ting a part thereof.

vIn a hypodermic syringe, the combination of astopper perforated lengthwise and adapted as a whole to be applied to or rel moved from the neck of a seruni-containing receptacle, and a thin easily perforatable lfilm, for closing the perforation in the stopper at one end, exteriorly applied to the inner end of the stopper to which it adheres 3. In a hypodermic syringe, the combination of a stopper having a perforation through it lengthwise and adapted as a whole to be applied to the neck of a serumcontaining receptacle, a needle having a stein seated in the said perforation, and a seal adapted to be easily. punctured for closing the inner end of the said perforation, the

seal being applied to the exterior of the stoppeiaiid of a material that will when so unite with the material of'the stopper so as to become a part thereof.

4l. A perforated stopper for a hypodermic syringe of unitary structure and adapted to be inserted into or removed fromthe neck of a serum-coniainiiig receptacle, having a seal exterior-ly applied toits inner end and,4 .ady heringtheieto and closing the innereend of Athe perforation therein. l l

5. In a hypodermic syringe, the combina-A tion of a stopper longitudinally perforated, a needle having a hub intermediate between `its ends and a stem portion extending beyond the hub of less lengthtlian the stopper and adaptedto be seated lin the perforation therein, and a seal-forV herinetically closin the inner end of the said perforation applied exteriorly to the stopper.

6. A iieXible stopper syringe nation with a hypodermic needle V'formed with a stein adapted to enter the perforation in the stopper, the end of thestem having ay bulbous enlargement, whereby' when the for a hypodermicA perforated longitudinally,`in combil stopper is inserted int-o the neck of a' iecepinner portionl of the stepper closing vthe taclethere is formed a close connection beinner end of the aid-perforation, and means 1o tween the stopper andthe stem of the needle. adapted to be inserted through thebore of 7. Ina hy odermic syringe', the eombinathe needle for rupturing the said. seal.

tion of'a per orated stopper, a needle .having FREDERIC D. BELVLf' e stein shorter than the stopper adapted to Witnesses enter the 'perforation therein, an easily rup- HELENE H. REED,

tured seal applied te the exterior of the 'F.l -v

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