Hypodermic syringe.

Application filed May'16,1904, Serial No. 208,141.

To all whom, it may concern:

Be it known that I, Justin de Lisle, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in 5 the county and State of New York, have invented a new and Improved Hypodermic Syringe, of which the following is a full, clear, and exact description.

The object of the invention is to provide a io hew and improved hypodermic syringe, more especially designed for making hypodermic injections of antitoxic serum and arranged to maintain its parts during the time the syringe is stored or in transit in an absolutely 15 aseptic condition, to prevent contamination of the serum, and to insure a free unobstructed flow of the serum through the needle when the syringe is used.

The invention consists of novel features and 20 partsand combinations of the same, as will be more fully described hereinafter, and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, 25 forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a sectional side elevation of the improvement, showing the parts assembled 3° and the serum sealed against deleterious or contaminating influences. Fig. 2 is a sectional side elevation of the improvement, showing the parts in position for making a hypodermic injection; and Fig. 3 is an enlarged 35 sectional side elevation of the needle, its supporting - stopper, its closing - wire, and the block.

The container A for the' serum or like charge B is in the form of a barrel open at 4^C both ends, one of the ends being, however, contracted to form a neck A', onto which fits exteriorly a stopper C, of rubber or other suitable material, and through this stopper C extends a needle D, projecting at its inner 45 end into the serum B, and through the bore of the said needle passes a wire E for keeping the bore closed to the serum during the time the syringe is stored or in transit. The wire E projects beyond both ends of the needle 5° D to prevent the serum from, passing into the inner end of the needle, and on the outer end of the said wire E is held a block F, of cork or similar suitable material, adapted to be pushed onto the point of the needle D, so as to firmly inclose the said point to keep the 55 latter free of contaminating influences, and at the same time preventing leakage through the needle.

The needle D is provided with external barbs D', engaging the material of the stop- 60 per G, so as to firmly support and hold the needle in position in the said stopper C, and the needle is also provided with a shoulder or flange D², resting on the top face of the stopper to hold the needle firmly in position in the 65 stopper, especially when the needle-point is forced into the skin.

The stopper C is provided in its bottom with a seat O', into which fits the exterior surface of the neck A', provided with an annu- 70 lar. projection or bead A², so as to securely hold the stopper against ordinary removal from the neck A' of the container A. The stopper C is also provided within the seat C' with a projection C², fitting into the neck A', 75 as plainly shown in Figs. 1 and 2, to prevent possible leakage of the serum by way of the stopper C.

A cap G, closed at one end, is fitted with its other or open end onto the stopper C, so that 80 the cap G incloses the outer end of the needle D, the block F, and the corresponding portion of the wire E. The cap G is provided with a contracted portion G', forming a stop to prevent the cap from passing too far down 85 onto the stopper C. The cap G is of such a diameter that it can readily enter the open end of the container A for the cap to serve as a piston-rod to push the piston H, contained in the outer open end of the container, in an 90 inward direction whenever it is desired to use the syringe for making a hypodermic injection, as indicated in Fig. 2.

In assembling the parts to prepare the syringe for the market it is necessary to proceed 95 as follows: The piston H is pushed into the container a desired distance to leave room between the top of the piston and the bottom of the. neck A' for the desired dose of serum to be used as a charge. A piece of cotton is 100

791,802 now temporarily placed in the neck A', and the container is then sterilized. The wire E is passed through the needle D, and the block F is engaged with the point of the needle, and 5 then the needle D is secured to the stopper C, after which the latter is placed in position on the cap G, and the latter and the parts attached thereto are now also sterilized. Both the sterilized container and the sterilized cap are now to taken to a sterilized or aseptic chamber or room, and then the cotton is removed from the neck A', and the serum is then filled into the container, after which the stopper C is immediately connected with the neck A'„so 15 that the several parts are assembled ready for shipment and use.

By the arrangement described the serum B is perfectly sealed and protected against any contaminating deleterious influences, and at 20 the same time the point of the needle is protected, and the bore of the needle is not liable to be clogged up by the serum, as the wire E fills the said bore. When the wire is withdrawn, it clears the bore of the needle of any 25 matter that may adhere to the walls of the bore.

When the several parts are assembled as described, the syringe can be readily stored or shipped, and when it is desired to use the syr30 inge to make a hypodermic injection then it is only necessary for the operator to remove the cap G from the stopper C, then to pull on the'block F, so as to disengage the block from the point of the needle, and to draw out the 35 wire E from the bore of the needle to render the bore unobstructed and clear the same of any matter that may possibly adhere to the walls of the bore, and then the operator uses the cap G as a piston-rod for pushing the pis40 ton H after the point of the needle is inserted under the skin in the usual manner. When the piston H is pushed by the cap G, the serum B is forced through the needle D under the skin of the patient. After the syringe has 45 been used for the purpose described it can be thrown away, as its cost is comparatively small.

From the f oregoing it will be seen that the needle and the serum are fully protected 50 against contaminating and deleterious influences, and the operator in order to use the syringe for making a hypodermic injection has but a few simple acts to perform, which acts do not require the operator to touch or 55 handle the needle or break any part of the syringe, as is now required with the syringes generally .in use.

The serum and all parts of the syringe are aseptic from the time of the sterilization to 60 the time the serum is injected under the skin.