US1718592A - Syringe - Google Patents

Description

INVEN'ToR.

ATTORNEY.

A. E. SMITH SYRINGE Filed Feb. l5. 1927 ARTHUR E. SMITH `lune 25', 192.9..

Patented June 25, 1929.

UNITED STATES ARTHUR ESMITH, OF LOS NGELES, CALIFORNIA.

SYRINGE.

Application filed February 15, 1927. Serial No. 168,295.

This invention relates to syringes which are adapted tor use with ampules.

The general object ot this invention is to provide a syringe in which an ampule may be loaded in a syringe and automatically correctly positioned when the movable member oi" the syringe is arranged in operative position.

Another object of this invention is to provide a syringey having a movable member adapted to receive the ampule and provided with means which is adapted to expel the contents ot the ampule.

Still another object oi. this invention is to provide a syringe wherein novel means is provided for forming a luid tight joint between a portion of the syringe and an ampule to prevent .leakage when the syringe is operated to expel the contents of the ampule.

Other objects and advantages of this invention will be apparent from the followingdescription taken in eonnectionwith the aecoinpanying drawings wherein Fig. 1 is a central vertical section of a syringe embodying the features of my invention.

Fig. 2 is an extended view of my improved syringe.

Fig. 3 is a cross section taken on line 3 3 oit lii 1.

Fig. l is a bottom plan view of the ampule holding and plunger section of the syringe.

F ig. 5 is a top plan view of the main body or barrel of the syringe and F ig. 6 is a sectional detail view of an ampule which may be used in connection with my improved syringe.

Referring to the drawing by reference characters Vl: have indicated my improved syringe generallyat 10. The syringe coinp -ses a barrel or body 11 having a cross bar 12 adjacent its top and having its lower end internally threaded as at 13. The end of the `barrel is chamt'ered outwardly as at 111, and `the main portion ot the barrel is provided with spaced elongated apertures 11', the function ot which will be explained hereinafter.

A tip 15 is in threaded engagement with the lower end of the barrel 12 and terminates in a reduced externally threaded portion 16. The tip 15 is provided with a conical recess 17 and has a hollow dischargetube 18 soldered or otherwise secured in the reduced end portion 16. The tip 15 is also provided at its upper end with internal threads as shown at 19.

`readily A cone 2O is disposed in the conical recess 17 and tightly engages the discharge tube 18. The cone 2() is preferably made of rubk berend is provided with a conical recess 21. Adjacent the top of the rubber cone 2O on the surface of the recess 21, a circular ridge or bead 22 is provided. The rubber cone 20 is adapted to be maintained in position in the tip 15 by a ring 23 which is externally threaded to engage the internal threads 19 of the tip. A hypodermic needle 25 having a hub portion 2G is secured to the tip 15 by screw threaded engagement with the reduced end 16 of the tip.

An ampu le holding and centering member 27 is adapted to be slidably mounted in the body. rlhe ampule holder 27 comprises a tubular body 28 having spaced elongated apertu res 2J therein and having a handle member 3() which includes a hub portion 31 threaded with the end oif 'the body 23.

rlhe end surface of the tubular body 23 is ehan'l'tered outwardly as at 32. A plunger rod. 33 secured in` the hub portion 31 ot the handle 30. This plunger' rod 33 is provided at its lower end with an enlarged head 34.

An ampule which maybe used in connection with my improved syringe is shown in F i g. G, indicated generally by the numeral 35. This ampule is preferably made of glass and comprises a tubular body 36 having a restricted end portion 37 which is closed at the bottom by a tip 38. The tip 33 is rendered removable from the portion 37 by providing an etched, scored, or molded notch 39 completely aroundthe restricted portion 3 The large end ot the tubular body 36 is closed by a stopper 10 which is lmelerably made of rubber and which is slidable in the body 36. The outer end edge oit the body36 is preferably beveled as at 4:1.

l/Vhen an operator desires to use my device the ampule holder 27 is removed .trom the body 1 1 et the syringe. The tip of the ampule is broken and the ampule is inserted in barrel or holder 11 until the end of the ampule engages the cone 2O and the bead 22 engages the ampule. The neck 37 is fitted over the tube 13 as shown in Fig. 1.

rlhe centering member 27 is then inserted in the barrel. This member tits snugly within the tubular body of the barrel and as the `member 27 slides in the barrel the bevel 32 engages the bevel 41 on the end of the ampule and centers the ampule.

As the movement of the member 27 continues the plunger head 34 forces the rubber stopper 4() toward the restricted portion 37 and thus forces the contents of the ampule into the discharge tube 18 and into the hypodermie needle 25.

As pressure is applied to the stopper the neck 37 of the ampule will be forced into tight engagement with the surface of the conical part 21 of the con`e 20 to thereby create a fluid tight joint between the two. Also as the neck 37v of the ampule is forced downward against the side walls of the conical recess 21 o the cone 2O the pressure against the side walls will tend to force the bead 22 to grip the sides ofthe neck 37 of the ampule and thus form another fluid tight joint. This will preventleakage, if for any reason there is a defect in the rubber cone or the fractured end of the ampule' which might allow the ampule contents to leak past the first mentioned joint formed by the contact of the fractured end of the ampule with the side walls of the conical recess in the cone 20.

The elongated apertures 11 in the syringe body 11 and the apertures 29 in the ampule holder 27 form viewing apertures through which the operator may observe to what extent the contents of the ampule has been removed.

'From the foregoing description it will be apparent that I have provided a syringe embodying novel features and which may be readily loaded, easily operatedV and which is highly efficient in use.

What I claim is:

1. A syringe" of the character described comprising a barrel, means in said barrel for engaging the end part of an ampule and a member slidable in said barrel, said member having means rigid thereon for centering an ampule and also having means rigid thereon movable within an ampule for engaging a stopper in the ampule.

2. A syringe adapted to receive an ampule and having means at its discharge end to make fluid tight engagement with the end portion 'of an ampule, a member movable in said syringe, saidmember including a part adapted to engage the ampule to center it and a second part immovable relative to the first part and adapted to fit within the ampule` 3. In a syringe adapted to expel the contents of an ampule, a barrel, an ampule holder adapted to slide within said barrel, said ampule holder including a handle having a hollow tubular body rigid thereon adapted to engage the outer` surface of an ampule, and a lplunger rigid on the handle and arranged within the hollow of said body, said plunger being adapted to lit within an ampule.

'4. In combination 1n a syringe, a barrel, an ampule and an operating member, said barrel comprising an elongated hollow body, said ampule including a hollow body having means movable therein to force the contents out of the ampule and said operating member including a handle portion having a hollow sleeve thereon, said sleeve being adapted to slide within the barrel to center the ampule in the barrel, said operating member including a plunger fixed with respect to said sleeve and movable into said ampule to engage said movable means and move said means.

5. A syringe adapted to expel the contents of an ampule comprising a barrel, an ampule holder adapted to slideI within said barrel, said holder comprising a hollow tubular body having one end beveled outward, a handle on said ampule holder, and a plunger rod within the hollow of said body, and engaging an end of ampule holder, said hollow tubular body of said ampule holder bein" of a size to fit over the outside of an ampule wliile said plunger engages a stopper to expel the contents of said ampule.

6. In combination in a syringe, a barrel, an ampule and an operating member, said barrel comprising an elongated hollow body having means at one end for engaging an end of the ampule, said ampule including a hollow body having a stopper movable therein to force the contents out of the ampule, said operating member including a handle portion having an open ended hollow sleeve thereon adapted to slide within the barrel, means on said sleeve adapted to center the ampule in the barrel, said operating member including a lplunger rigid thereon and movable into said ampule to engage said stopper and move it to force the contents from said ampule.

7. In combination in a syringe, a barrel, an ampule and an operating member, said barrel comprising an elongated hollow body having means at one end for engaging an end of the ampule, said ampule including a hollow body having a stopper movable therein to yforce the contents out of the ampule and said operating member including a handle portion having an open ended hollow sleeve thereon, said sleeve having a chamfered lower end adapted to slide within the barrel, said sleeve having an internal diameter slightly greater than the outside diameter of the ampule, said sleeve being adapted to center the am )ule in the barrel, said operating meinber including a plunger fixed with respect to said sleeve and movable into said am Jule to engage said stopper and move it to force the contents from said ampule.

In testimony whereof, I hereunto ailix my signature.

ARTHUR E. SMITH.

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