US 921130 A
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B. F. LOCKWOOD.
APPLICATION FILED MAY 2, 190s.
921 1 30, l Patented May 11, 1909.
@In uw attenua) glass, having a collapsible partition therein BENJAMIN F. LQGKWOOD, OF FREWSBURG, NEW YORK.
SYRINGE Specification of Letters Patent.
Patented May 1 1, 1909.
Application filed. May 2, 1908. Serial No. 430,430.
To all 'whom/t may concern:
Be it known that I, BENJAMIN F. LOCK- wooD, a citizen of the United States, residing at Frewsburg, inthe county of Chautauqua and State of New York, have invented a new and useful Improvement in Syringes,A of which the following, taken' in connection with the accompanying drawing, is a full, clear, and exact description.v
The invention relates to injecting syringes and the objectsof my invention are first, to provide a receptacle for storing fluids without contact with air, containing an air tight collapsible sack containing air so as to resiliently hold said fluids without danger of breakage of said receptacle due to the expansion and contraction of the contained liuid on account of the varying temperatures -to which'it may be subjected; second, to pro'-v vide means for producing fluid pressure upon said colla sible sack whereby the contained fiuid in said receptacle may, when desired,l be forced from said receptacle Without air ontact; and third to providean iniecting needle and sealed nozzle whereby said iniecting needle may be inserted into said nozzle and the contained fluid in said receptacle without contact with air so that said fluid may be inj ected through said needle entirely free from l air.
In the drawings, Figure 1 is a lengthwise sectional view of a sealed tube, preferably of dividing said tube into two compartments and a sealed nozzle at one end of said tube. Fig. 2 is a sectional view of a tube and nozzle having a partition, the rear end of the tube being fitted with a resilient pressure bulb preferably of rubber. Fig. 3 is a secl tional view of a tube having a nozzle and resilicnt artition therein, the end opposite said nozzle eing fitted with a piston to give pressure upon said resilient partition. Fig. 4 is a sectional view of a syringe tube havinga nozzle, showing my improved form of inecting needle inserted in said nozzle, and a piston having a resilient air chamber on its compression surface-within said tube. Fig. 5 is a lengthwise sectional view of the nozzle portion -of the tube'and the injecting needle inserted therein. Fig. 6 is a lengthwise sectional view of a sealed tube having an air tight, pliable, collapsible, sack for containing air or volatile iiuid under'pressure, said tube being shown in process of refilling.
Similar numerals refer to corresponding parts 1n the several views.
The numeral 1() indicates the receptacle,
which is neferably made, in tubular form of glass an sealed' at each of the ends 11 and 12, as shown in Fig. 1. Before end 11 of tube 10 is drawn down in the )recess of sealing an air tight collapsible sac 14 is inserted within the same, the sack being filled with air under pressure or with a volatile fluid capable of producing fluid. Sack 14 may be entirely free from attachment to the inner lside of tube 10, as shown iu Fig. 6, but preferably a slight annular enlargement 13 is made Vin the. glass about midway of the length of the tube and an annular attachment is made lat 15 of the outer sides of the sack 14 within tube 10. Sack 14 may be made of sheet rub.
ber or any collapsible air tight material which would serve the purpose.
' Sack 14 may be made in the modified form of a half sack open at one end and having an annular attachment 16 which modification is shown in Figs. 2 and 3. It is obvious that. vsuch a modified form of sack 14 is necessary Where the pressure is obtained from lan elastic bulb, as shown in Fig. 2 .or a piston, as shown in Fig. 3.
End 12 is drawn out in a tubular nozzle17 and then in a smaller portion 18 which may v be easily closed or sealed by melting the glass. Before drawing out the end 18 the space 19 is charged with the serum or fluid in such a manner as to be entirely free from the contact of air and an inner rubber plug 16 is forced into nozzle 17. A small portion 'of mobile viscid substance, as for eXam le glycerin is placed in nozzle 17 the nozzle eing held so that the glycerin rests upon plug 20, a second plug 21, preferably of soft rubber, having a lesser curve on its inner end than the outer curve of the inner plug 20 so as to provide a small space 22 or break in the continuity of the completed soft rubber plug .21 and 22, which space is completely filled by the\viscid substance as above described. The outer surface of the two plugs 20 and 21 are covered with cement before being inserted in the nozzle 17 so that they are cemented l needle 31 is provided with a resistant stop 32 iirmly in place Within the nozzle. A thin funnel-shaped glass or metallic guide 23 is eemented to the Walls of the outer plug 21 which is formed in'a funnel-shape to correspond to the funnel-shaped guide 23 so that when pressed against the plug 23 it adheres thereto. The nozzle 17 is then drawn out in the portion 18 and sealed, as shown thereby hermetically sealing the contained iiuid.
Before the insertion of the charge of iuid or serum to be injected, the s ace 24 in the rear end oftube 10` is filled volatile fluid like ethyl chlorid which on'evaporating exerts considerable pressure. The pressure oi' the fluid or condensed air, or other as which may be introduced in space 24 shou d be sufciently greater than the pressure of the fluid in space 19 so that when opportunity is given for the fluid charge, another space 19 is to be ejected or injected the pressure of the fluid or condensed gas Within space 24 will automatically discharge the same, pressing the elastic sack 14 into the opposite end, as shown in dotted line in Figs. 1 and 2, the sack or collapsible partition 14 being shown in different degrees as it is advanced by the pressure thereof and is eventually turned inside out, ihu completely expelling the contained Instead of the air or other iiuid under pressure in space 24 to expel the charge in space 19 the end 11 of tube 10 is left open in a small glass bulb 25 having an orifice 26 therein and an elastic bulb 27 is provided of suflicient magnitude to produce the desired pressure u on sack 14 by the compression of bulb 27. urther modiication is shown in Figs. 3 and 4, the piston 28 is inserted Within tube 10 through oriiice 26 in order to provide pressure upon sack 14 and the contained fluid.
On account of the danger of breakage of tube 10 due to the expansion and contraction of the contained iiuid on account ofthe varying temperature to which it may be subjected, it is necessary to provide a resilient holding or cushion for the contained fluid Within space 19.( Air has been used as such a cushion but since the purpose of this invention is to entirely do away with the contact of air with the serum or other Huid to be injected, the resilient sack 14 is rovided. In the case of a iston syringe sue a resilient cushioning of t e air tight receptacle might be attained by the attachment of an a1r tight collapsible sack 2 9 on the face of the piston head 30, the sack 29.being filled With air and extending out into the space 19 within tube 10. It is a parent that such-an arran ement would orm an air tight cushion for t e contained fluid substance which would not allow the contact of the air upon the same. In order to discharge the contained fluid from the syringe the nozzle 17 is broken off at line X X as shown, and a hollow injecting .to prevent too great introduction ol' the needle into the nozzle. Stop 32 may be of any convenient form or material but is preferably a flat metallic plate soldered to the needle 31. The needle 31 is pointed at ends 33 and 34, and end 33 extends through stop 32 to a sufficient distance to penetrate through the soft rubber plugs 2() and 21.
The outer end 34 of needle 31 is first in- 'serted in the flesh where it is desired to inject,
the contained Huid, the inner end 33 is then inserted through the plugs 20 and 21, bein guided thereto by the glass or metallic funne 23 so as to quickly pierce the same and enter the space 19 Where the fluid. is contained under pressure. It is apparent that injection may thus be made instantaneously without danger of injecting air and under perfectly antiseptic and germ-free conditions. The space 19 maybe .charged or recharged by means of a hollow'needle similar to 31, .the inner point 33 being inserted through the soft rubber plugs 20 and 21. It is apparent that the fluid may be injected into the s ace 19 under as great a pressure as desired. The texture of the soft'rubber plugs 20 and 21 with the viscid iuid therebetween being such that upon the Withdrawal of needle 31, the needle uncture in this elastic material will close, t us becoming self-healing and preventing the escape of the contained iuid. The funnel 23, the sides acting as a guide, is also used to su port the soft rubber or elasti(` material used or plugs 20 and 21 so that this self-healing principle may be intensified.-
After the injection of the iiuid the outer end of the nozzle may be drawn out and resealed in a suitable flame. It is also apparent that such a syringe or receptacle may be cheaply constructed and thus provide a receptacle for storing anti-toxic serum Without contact of air hermetically sealed for'an indefinite length of time. ,For this purpose it is obvious that the form shown in Fi 1 is preferred though either of the modi cations might serve a good purpose.
I claim as new 1. A rece tacle for iuid under pressure consisting o an air tight receptacle, and a resilient air tight sack within said receptacle containing air under pressure to eject the luid from said air-tight receptacle.
2. A recefptacle for fluid under pressure consisting o an air-tight receptacle, a resilient air-tight sack within said receptacle containing air under pressure, and means for librating the iiuid from said air-tight receptac e.
3. A rece tacle for fluid under pressure consisting o an air tight receptacle having a frangible end, a resilient collapsible air tight partition in said receptacle, substantially as and for the purpose specified.
4. A receptacle for iiuid under pressure iii',
. andI a funnel-shaped consistin of a closed glass tube, a resilient Icollapsib e air-tight sack in said tube, and means for injecting fluid into said tube, without contact of air. A syringe consisting of a tube having an iftighl', space therein to contain Huid, a re- "fjsili'ent partition in said tube forming one end p "of said-,air tight space, and means for producling pressure upon said vresilient partition to eject said-Huid.
6. A syringe consisting of a tube having an v air-tight vspace therein to contain fluid under pressure, two soft rubber lugs in one end of l saidtube," and a lv iscid. uid between said plugs.A
7. A syringe consistingof a tube having an l air-tight space therein to contain fluid under pressure, two softrubber` plugs :in one end of said tube, a viscid fluid luaie'tween` said plu s, lideattached to t e outer plug, substantie yjas and for the pur.-
syringe consisting of a glass tube having an air tight space therein to contain fluid under pressure, a hermetically sealed nozzle on said tube to be broken oli', two plu s of soft rubber in said nozzle, a viscid ilui between said plugs, and a suitable injecting needle for inserting through said plugs' to discharge said luid under pressure.
9. A syringe consisting of a tubey 10 having hermetically sealed nozzle portion 17 thereon, a resilient air-tight partition 14 attached to the inner side of' said tube, soft rubber plugs 2O and 21 in said nozzle having :e
space between them, and injecting needle 31 insertible through said plugs, and means for producing pressure on said resilient partition