US1388946A - Hypodermic syringe - Google Patents

Description

.To all whom# may concern 'UNITED STATES PATENT oFFlca LUELLA'T.. eooLD, or ARLmGToN, MASSACHUSETTS, ASSIGNOR To SEM-I -UNTT con.. ronATroN, or" ARLINGTON, MASSACHUSETTS, A conroaATron or MASSAQ'HUf SETTS. j

HYPODERMIC SYRINGE.

Specification of Letters Patent. Patented Allg. 30, 19,21.

Application filed May 18, 1920. Serial No.`382,445.

Be it `known that l, LUELLA L. GooLD, a citizen of the United States, residing at Arlington, in the county or Middlesex and State of Massachusetts, have invented new and usetul lmprovements in Hypodermic Syringes, of which the following is a speci ncation.

rlhis invention relates to a hypodermic syringe, comprising a collapsible container in which a charge oi liquid serum, or other medicamentis hermetically sealed, and a hypodermic needle having a rigid hub Secured to the container, the syringe being provided with a rupturable closure between the needle hub and the charge of liquid. normally preventing the passage of liquid to the needle, and with means for causing rupture of the diaphragm when pressure is exerted on the container to collapse the same.

The object of the invention is to provide improved means for connecting the needle hub with the container, and ior confining the diaphragm in such manner as to provide a liquid-tight joint and permit the rupture of the diaphragm when pressure is exerted on the container. Y

The invention is embodied in the improvements which I will now proceed to describe and claim.

Ot the accompanying drawings forming a part ci this specification`,-

dermic syringe embodying the invention.

Fig. 2 is an enlarged section on line 2-2 of Fig. 1.

Fig. 8 is an enlargement of portions of i Fig. 2, showingthe parts separated.

Fig. 4 s a view similar to a portion of Fig. 2, showing a modification.`

The same reference characters indicate the same parts in all of the figures.

In the drawings, 12 represents a collapsible tube made of any suitabie ductile metal or alloy, open at one end and closed at the opposite end, the tube being preferably a cylindrical cup, the bottom of which constitutes the closed end. Surrounding the open end is an annular outwardly projecting iiange 13. 14 is a flexible and easily rupturable diaphragm, which is preferably a disk of tin foil, considerably thinner than Figure 1 is aside elevation oit' a hypo--` the wall and iiange of the tube, and seated on the flange 13. 15 represents a rigid metal hub, to which is attached a h ypodermic needle 16. The hub is provided with a rigid annular tace 17 seated on the marginal portion of the diaphragm; or that portion ksaid flange and hub, and thus form a liquidtight joint. l t

The said coupling member is4 preferably composed of an annular jaw portion 21, seated on the flange 13, and a sleeve portion 22, crimped against the marginal portion of the hub, as shown by Fig. 2, the said coupling member being made of a suitable ductile metal or alloy. In crimping the sleeve portion 22, suflicient pressure is exerted to cause the annular face 17 and jaw portion 21, to compress the portion of the diaphragm between the iiange 13 and the annular face 17. Said face is preferably formed as a bead adapted to indent the diaphragm, and thus form an annular weakened line thereon, so that when collapsing pressure is exerted on the tube 12, the resulting pressure of the liquid on the diaphragm will break the latter at said weakened line, or a part thereof, and permit the liquid to pass through the diaphragm. The inner end of the hub 15 is preferably provided with a recess 24. into which a portion of the ruptured diaphragm may be forced, the receiving end of the needle 16 being spaced from the diaphragm when the latter is intact. The coupling member may be otherwise formed and applied. Fig. 4 shows a two-part coupling member, one part of which includes a jaw portion 25, and an internally threaded sleeve portion 26,the other part including y an externally threaded clamping ring or jaw 27, screwed into the sleeve 26. and bearing on the marginal portion of the hub.

The needle 16 may be provided with a penetrating point 28 at its inner end, adaptter is fiexed into the recess 24. Fig. 4 shows rounding the open end, the opposite end olfv the tube being hermetically closed, a flexible and easily rupturable diaphragm seated at its marginal portion on said llange, and forming a closure for said open end, a rigid needle hub having an annular clamping face, seated on the marginal portion of said diaphragm, a hypodermc needle secured to said hub, and a coupling member having means exerting clamping pressure on the tube llange, and on the hub, to clamp the marginal portion of the diaphragm between said llange and the annularface of the hub. i

2. A hypodermic syringe substantially as specified by claim l, the coupling member being composed of an annular jaw portion seated on the tube llange, and a sleeve portion crimped against the marginal portion of the hub to clamp the marginal portion of the diaphragm between said flange and the annular face of the hub.

3. A hypodermic syringe substantially as specified by claim l, the hub being provided with a recess surrounded by said annular clamping face, to permit outward flexure of the central portion of the diaphragm when pressure is exerted on the tube.

4. A hypodermic syringe substantially as specified by claim 1, the said annular clamping face being formed t0 indent the marginal portion of the diaphragm, and thereby weaken said portion to facilitate rupture of the diaphragm.

5. A hypodermic syringe comprising a collapsible tube open at one end and having an annular outwardly projecting flange surrounding the open end, the opposite end of the tube being hermetically closed, a flexible and easily rupturable diaphragm seated at its marginal portion on said flange, and forming a closure for said open end, a rigid needle hub, having an annular flange seated on the marginal portion of said diaphragm, one side of said flange forming an annular vclamping face, a hypodermic needle secured to said hub, and a malleable coupling member, including an annular flange seated on one side of the tube llange, and a sleeve integral with said llange, and crimped against the outer side of the hub llange, to exert clamping pressure on the tube flange and 0n the hub flange. y

In testimony whereof` I have allxed my signature.

LUELLA L. GOOLD.

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