US 2907328 A
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M. J. COHEN HYPODERMIC SYRINGE 2 Sheets-Sheet 1 INVENTOR Milf@ ,z cohen ATTORNEY Oct. 6, 1959 Filed March 2o, 195s SZICS My invention relates to a hypodermic syringe `and it is an object of the same to provide adisposable .syringe that shall be inexpensive as to materials-and assembly; that` can be put to use witha minimum of preliminaries, therefore being ravailable for use byvunskilled i persons or under unfavorable conditions such as strong cold or extreme heat or otherphysically unfavorable conditions; 'that shall be adapted to sterilize areas of skin adjacentl the point of application withthe least possible delay; that can also serve to deaden the nerves at such points to lessen shock to a patient and that can quickly warm to body temperature a syringe and the liquid that is to be injected, for the purpose of reducing shock such as may result from the use of a cold syringe and the injection of a cold liquid, the heating means being also available to thaw a frozen liquid in case of mecd..
Another object is to provide improved plungers for hypoderrnic syringes.
Still another object is to provide improved means for supporting the needle in such asyringe.
Since it is of major importance to prevent any leakage of contents of such syringes, as well as to prevent .entry of any foreign matter of whatever nature, and,to avoid contact of such contents with anymaterial that-,might possibly react with such contents, I have provided a glass barrel with means to seal lits, contents and with coacting parts of rubber, neither the -rubbernor the glass I being subject torcorrosion by any'probablecontents of the syringe, nor chemically combinable with. such contents. f
Referring now to the annexed drawingaqwhich are made a part of this application and in which similar reference characters indicate .similar parts;
Figure l is a longitudinal section of the device of my invention.
Figures 2, 3 and 4 sections respectively on lines 2-2, 3-3, and 4--4 of Figlre l.
Figures 5 and 7 respectively a longitudinal section l.and an elevation of part of the vneedle end portion ofarnodilied form of the invention. Y j
Fig. 6, a longitudinal section of a portion of laimed# lication of the plunger of Fig. 1. f
Fig. 8, a longitudinal section of another form ofthe invention, and
Figs. 9, l0 and 1l, respectively transverse sections of Fig. 8 on lines 9 9, 'l0-10, and -11-11.
In the drawings, reference .character 20 indicates the .f
glass barrel of a syringe in Figs. 1 `to 4, :said barrel having an integral radial ange 21 at. one -end beneath which the fingers can engage in using the syringe, whileff the thumb bears on the head 22 of a plunger 23 for ejecting the contents of the chamber in the barrel in well known manner. At the end of the barrel farthest from the flange 22 there is a similar ange 24 that is connected to the body of the barrel by a neck 25. A washer 26 is positioned against the outer end face of the tlange 24 and a needle 27 is clamped in place by means of a metallic connector 28 to which theneedle is xed by 2,967,323 Patented Oct. 6, 1959 ice placing it in a central opening and swaging the metal about the needle or. otherwise ailixing it thereto. lt will be seen that the rubber washer seals the contents o the. chamber: against any leakage or contact with the parts; at thel front end of the syringe except Vthat the interior of the barrel connects with a hollow needle while all parts at that end are locked in place. by the metallic connector 28. Y r
In another.;=form, as shown in Fig..8, the needle 27 may be aiiixed to a disc 28a, 28b, 28e, clamped in place overa washerV 2.6 by a 'metal 4connector 28', with the needle projecting through a central opening in the connestor.
A cap'29 which may consist wholly or only in part of stretchable material such as rubber is engaged over the end of the syringe in position to cover the needle and the .cap has a rim 30 engaging between the opposed faces'fof the connector 28 and the barrel 20;.as shown in. Fig'.` l.. The rim need not fit precisely lbetween such faccsbut should maintain the position indicated while being easily removable to expose the needle and permit its uselin. the usual manner. A cavity about the needle contains a pad' of fibrous material 30', which is impregnatedfwith .a medicament such as antiseptic ointment. The inner end wall of the .cap is preferably. made of soft rubber vor like'material'into whichv the end vof the needle may penetrate far .enough to sealthe passage thru the needle and thus prevent. leakage of .the .contents of the chamber yin barrel'Zi, awhile'A also locking the plunger against movement, .asf explained in my copending application. Ser'. No. 255,983, tiled. November 13, 1952. The antiseptic material preserves the needle and the pad 30' may be y,taken out and rubbed over the area at which injection is totake place so asto prevent infection.
The plunger '23 is hollow and may consist essentially of a thin-walled length of aluminum tubing having a jagged endcrimped about the sternV 31 .of a plug 32 that has circumferential ridges to scrape the interior of the barrel. clean and vthus; insure use of all the contents 41 of the chamber in ybarrel .20, which are to be injected Y into the body of the patient, said plunger also sealing the rear .end of the .chamber and retaining the liquid contents unt-il the syringe is to be used. The hollow space in the plunger furnishes .a convenient storage place for a frangible .or crushable .ampule 3.3 containing anesthet-izing material, :the ampule being here l.shown as being pointed Aat Vits `rea-r end. A cap or cover 34 of rubber 0r .Other :flexible material iS psitioned at the rear end of the plunger, said cover being shaped to -iit .over the liange 22 so as to hold the cover in place, and having a pointed portion 3.5 into which the .capsule 3x3-can slide when the :syringe is tilted, said capsule tting more or less closelyin the cover. The cover has a port 35 in its pointed end, so that the contents of the capsule may pass/out .of the syringe when the capsule is .crushed by the fingers, vthe port being directed on the area of injection'surface, :which prevents pain of `needle upon. entry intothelskim TheA empty cover can collapse or fall overiagainst the plunger, but the Yflexible material of the cover :will Aprevent cutting of the. nsers fingers, as by fragments of the glass of au ampule and at .the saine time .allow .thunib'pressufre on the plunger lwithout discomtort. .Sparc needles or othersrnall articles can be. stored safely .in the interior .of the plunger if desired.v The dotted lines in Fig. 1 illustrate the position the capsule may assume in the cover when the syringe is tilted preliminary to the crushing of the capsule. Because disposable syringes and their contents may become uncoml fortably cold in winter or in cold climates it is desirable to provide: means whereby they can easily and quickly be raised to body temperature, and for those reasons l have added to the device a heating means which is a modification of my Patent No. 2,615,447, comprising a hollow sleeve having inner and outer .walls 36 and 37 with a space between them, said sleeve being tapered at one end at 38 so as not to interfere withl the entering of the users lingers between the sleeve and the flange 21. At its other end the sleeve preferably has an elastic collar 38' that grips the barrel 20 tightly enough to resist free sliding of the sleeve along the barrel, though permitting the removal of the entire sleeve from the barrel and at least the outer wall 37 is flexible. f
In the space between the Walls 36, 37 I place frangible capsules 39 holding liquid such as water and the capsules are embedded in granular exothermic material 40 such as will emit heat when wet, as may be caused by kneading the flexible wall of the outer sleeve to break the capsules andrelease their contents. v'The function of the water is to combine with the material 4l) and emit heat, as by the combination of water with chemicals, eg., such as set forth in Patent No. 1,901,313to Mann. In the use of this syringe the device can be tilted to cause the capsule 33 to enter the pointed portion `35 after which the capsule is crushed and its contents ejected through port 35 and applied to the area to be treated,
to anesthetize the skin at that area.' The cap 29 may .w
be removed either before or after application and the pad 30 applied to skin area if desired to sterilize the same, after which the injection may follow at once if the temperature is mild. Otherwise, the receptacles for capsules 39 before or after the preliminary treatment, may be kneaded to rupture them and injection may be postponed until the liquid in the barrel -is warmed. After injection the syringe is discarded.
In the modified formof Figs. 5 and` 7 all parts may previously elaborated so that the medicament is preserved -in full quantity and purity until used.
. heating means in the sleeve, the heating means comprising granular exotherrnicl material with frangible liquidcontaining capsules interspersed among the granules and the sleeve being ilexible.
2. In a hypodermic syringe having 'a barrel, a needle z ixed atone end of the barrel and a plunger in the barrel,
be as above described but the cap 42.is made of metal or relatively inelastic material with a notch in its skirt to permit limited expansion of the skirt. 'Ihe lower margin of the skirt is folded in to form a flange or hemlike part 44 that gives limited rigidity to the said margin which can snap past the adjacent margin of connector 28 to hold the cap in place as shown in Fig. 5.
In Fig. 6 I have shown a modicd plunger, in which the tube 20" is connected to thefpiston head 47 by one or more inwardly extending corrugations 46 that are pressed into the stem- ,of said head to hold the head in place.
In the form shown in Figs. 8 to l1 the parts shown are generally the same asthose above described, but the plunger consists of a rubber tube 48 with an integral circumferentially corrugated head -49 and an integral rear ilange 59. Since such a sleeve would serve as a plunger for ejecting the contents of the syringe I have inserted a rod of steel or other rigid material to strengthen the plunger. l
At the needle end of the device the parts in this Aform of the invention are as above described, but instead of swaging the needle into place in an aperture of the metallic connector I provide a special hub for holding the same. This hub consists of a washer-like flange 28a that lies between the rubber washer 26 and an inwardly extending flange of connector 28. Integral with the flange 28a there is a forwardly extending annular flange or mantle 28b supporting a boss 28C whichris swaged about the shank of the needle 27 or otherwise rigidly fixed thereto. No leakage into or out of the medicament chamber is possible and no contact of the medicament with material that can affect the medicament is possible as all parts of the syringe are glass, rubber or aluminum, the plunger cannot move out or in for reasons a sleeve comprising inner and outer cylindrical walls With a circumferentially extending space between them, at least the outer wall being ilexible, frangible waterilled capsules in said space, and granular exothermic material lling the interstices between them.
3. In a hypodermic syringe, a barrel, a needle projecting from the barrel, a tubular plunger in the barrel, a solid head closing one end of the plunger, a crushable capsule in'the plunger, a ilexible cover at the other end of the plunger, said cover shaped to contain the-capsule,
and a port in the cover.
4. A device as in claim 3, wherein the capsule is a glass ampule.
5. A device as in claim 4, wherein the ampule contains anaesthetic material.
6; A -device as in claim 3, wherein the capsule is pointed at one end and the cover has a point shaped to tit about the point of the capsule.
7. A hypodermic syringe comprising a barrel having 'l an annular flange at one end, a reduced neck portion betweensaid flange and the body of the barrel, an elastic washer fitting against the outer face of said llange, means for securingthe washer against the ilange including a disk bearing against the washer and having a portion bearing against the rear face of the llange, and a hypodermic needle permanently secured to the disk.
8. In a hypodermicl syringe, a barrel, a needle permanently secured to the barrel, a rubber plunger head Vin thebarrel, and a tubular plunger in the barrel, said tubular plunger having an open end portion crimped about a portion of said rubber plunger head and permanently securing said plunger to said plunger head.
References Cited in the lile of this patent UNITED STATES PATENTS 1,529,659 Marcy Mar. 17, 1925 1,961,490` Hein June 5, 1934 2,102,704 Hein Dec. 2l, 1937 2,193,489 Nevin Mar. l2, 1940 2,538,390 SmithV Ian. 16, 1951 2,542,814 Hoskins Feb. 20, 1951 2,615,447 Cohen Oct. 28, 1952 FOREIGN PATENTS 103,440 Great Britain Ian. 25, 1917 297,644 Germany' May 4, 1917 'f4-54,775 Great Britain Oct. 7, 1936 l ,957,829 France Aug. 29, 1949