Control syringe assembly and attachment

2,882,901

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April 21, 1959

E. J. DE VENEZIA

CONTROL SYRINGE ASSEMBLY AND ATTACHMENT

Filed June,.6, 1957

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attorneys

United States Patent Office 2,882,901 ________________ Patented Apr. 21, 1959 plunger 15. If the plunger and barrel be constructed in manners such that a series of one may be interchangeably employed with elements of the other, then it is obvious that the techniques involving cleaning and sterilizing of the syringe are substantially simplified.

In other words, under those circumstances, it is unnecessary to match a specific barrel with a given plunger Therefore, if these parts together with the attachments mounted thereby are cleaned and sterilized and if during these operations one or the other part is broken, no difficulties will be experienced. This will be because any one of a series of plungers removed from the sterilizer will fit any one of a series of barrels.

The attachment contemplated for the plunger conveniently embraces a cup-shaped extension 17, to which Hmb-accommodated ring 18' is secured, which preferably has a threaded exterior zone. Cooperating with the threaded part is a retaining ring 19, the inner diameter of which is sufficiently large to permit the passage of plunger 15 but is sufficiently restricted to prevent bead or flange 16 to pass therethrough. A disc 18 is inter^p°^se°^etweenthe ®^nd of the plunger and the extension 17. This disc is preferably of rubber or similar material and serves to cushion the bead zone 16 of the plunger with respect to the parts of the attachment. However in no manner does it prevent ring 19 from being tightened with respect to the cup-shaped extension so that the plunger is firmly gripped to prevent any movements of the latter with respect to this part of the attachment rhe second portion of the attachment which forms the major part of the present invention also involves an extension. This is in the form of collar 20 continued in cup-shape to provide a threaded flange 21. Mounted a « T p¹¹⁸?¹¹¹®³,'^{118 a} flanged ring 22 which has an inner a 35 diameter less than that of flange 13 forming a part of “^{e b}^\^eLc ?°,^wever’ ^th® flange has a greater diameter than that of the barrel bore.

Collar 20 has in its main portion a diameter sufficiently large that the barrel body 10 may be freely passed there· 7, ^{collar 18} conveniently formed of steel or other suitable material so that fingers 23, which may be integral therewith and extend axially thereof, shall embrace resiliency. Also, they will embody an inward set. In other words, they will extend towards the axis of the assembly. Therefore, any barrel received in this extension will be gripped by the latter adjacent the end zones of the annular series of fingers 23 and at its cpposite end may be coupled to flange 13 in a manner such that undesired movements are prevented.

To furnish a coupling providing for such a result, it is contemplated to employ a retainer as part of the collar assembly; such retainer preferably involving the detailed construction illustrated in Fig. 6. In that view, it will ,. ^b!.ⁿ?^{ted that the} retainer is m the form of a washer 24 w T’i T^{braCe a circular bod}V ^and delude upwardly bulged zones 25, which yieldingly resist deformation into the body zone of the spring retaining member. This washer should be inserted into the cupshaped rear portion of the extension as defined by flange sup- 60 21 m the manner shown in Figs. 3, 4 and 5. It is to be noted that the inner diameter defined by body 24 is greater than the exterior diameter of barrel 10. It is less than that of flange 13. Body 24 is also preferably pro^a ,^t0ng„^{ue 26}· ^Th® ^latter projects into an open65 mg 27 formed in flange 21. ^P

Having in mind that the barrel flange preferably has a pair of flattened surfaces 14, extensions 28 may be struck-up from body 24 at opposite sides of body 24 and Fina™^e*^^L^P°^{int from},;^A'b^ich tongue 26 projects., collar 20 —° —°— “° extend outwards from

Assuming that the extension involving parts 17 to 19

2,882,901

CONTROL SYRINGE ASSEMBLY AND ATTACHMENT

Edward J. De Venezia, Bloomfield, N.J., assignor to Becton, Dickinson and Company, Rutherford, NJ.. a corporation of New Jersey ’

Application June 6,1957, Serial No. 664,067

Claims. (Cl. 128—218)

This invention relates to an improved hypodermic syringe assembly and an attachment which forms a part of that assembly. In its more specific aspects, the invention contemplates what is commonly known as a control syringe.

By such a syringe, there is provided for the use of the physician or technician an apparatus which may readily be grasped or manipulated even when the user is wearing rubber gloves. So manipulated, it will be feasible to project the plunger to expel liquid or other medicament from the barrel. Also, the plunger may be retracted within the barrel to draw fluid into its interior under an aspirating action. Projection and retraction may both be controlled with nicety so that precisely predetermined amounts of liquid may be moved by the syringe assembly.

It is a primary object to furnish an assembly in which 30 the parts do not have to be separated when subjected to a sterilizing operation. In this matter and aside from the saving m time, breakage is reduced to a minimum.

A. further object is that of furnishing an attachment which may readily be associated with the parts of a syringe assembly and which will prevent, in subsequent use, undesired movements of those parts with respect to each other.

With these and other objects in mind, reference is had large tn to the attacned sheet of drawings illustrating a practical 40 through, embodiment of the invention and in which:

Fig. 1 is a side elevation of a complete syringe assembly;

Fig. 2 is a longitudinally sectional view taken along the Ime 2 2 in the direction of the arrows as indicated inFig. 1;

Fig. 3 is a. fragmentary enlarged sectional side view of the rear portion of the barrel with the attachment affixed thereto;

. Fig. 4 is a. sectional side view taken along the line 4__4 in the direction of the arrows as indicated in Fig. 3;

Fig. 5 is a transverse sectional view taken along the hne 5—5 and in the direction of the arrows as shown in Fig. 3; and

Fig. 6 is a perspective view of the preferred form and coupling means included in the assembly.

. Referring primarily to Figs. 1 and 2, the numeral 10 indicates the barrel of a syringe which is preferably tormed of glass and has its outer end closed except for ^a bored tip 11. The latter ordinarily receives a needle. Therefore a fitting 12 of the Luer type is shown as ^P05^te??^{y th}‘^{S tip}· ^{Tbe rear end of} barrel ¹⁸ is open and defined by an outwardly extending flange 13 integral therewith and which flange is non-circular. Preferably and as shown especially in Fig. 5, it may present flattened side portions 14 at diametrically opposite points.

Disposed for sliding movement within the bore of barrel 10 is a plunger 15 which again will preferably be formed of glass. In accordance with conventional ^:S£=SS:S =S - ==“»« embrace parts associated with the ends of barrel 10 and

2,882,901 ³ .

has been applied to plunger 15, then it becomes necessary to associate the extension with barrel 10. To this end, ring 22 is dismounted from collar 20. The spring coupling member 24, will, of course, rest within the cupshaped space defined by the collar flange. The. tip end of the syringe is inserted through the bore of this collar until the inner face of flange 13 bears against the sprung portions 25 of body 24. The tongue of the latter extends through opening 27 to thus provide a spline and recess structure. The body has its side portions 28 lying one adjacent each of the flattened zones 14 of flange 13. Now by applying ring 22 to flange 21 and tightening that ring, it is apparent that a space of diminishing area will be furnished for the accommodation of the flange 13.

Under continued tightening, the bulged portions 25 will bear with increasing resistance against the end face of flange 13. The latter will be prevented from turning with respect to body 24 because extensions 28 lie adjacent the flattened zones 14. Body 24 may not turn because.of tongue 26 preventing this. With finger-accommodating rings 29 projecting from opposite sides of collar 20, it is apparent that a complete attachment is furnished.

That attachment will be incapable of rotating around the axis of the syringe assembly. The tightening of ring 22 is, of course, discontinued when the parts firmly interengage as shown, for example, in Figs. 3 and 4. A physician or other technician may, for example, insert his thumb through loop 18' of an attachment such as has heretofore been described in association with the plunger. Obviously, a different form of attachment might be used in the latter connection; or under certain circumstances, this attachment might be dispensed with.

In any event, even while wearing a rubber glove, no difficulty will be experienced when inserting the index and middle finger of the hand through the loops 29. So inserted, it is apparent that there will be no danger of the syringe accidentally slipping from the hand. Also, the plunger may be accurately moved with respect to the barrel and the latter may be precisely supported. Therefore, exactly predetermined amounts of fluid may be dispensed with accuracy from the syringe or drawn into its bore under an aspirating action.

As is also apparent, the parts of the attachment may readily be associated with the parts of the syringe and will remain in association until it is desired to deliberately detach them. This detachment can be readily affected. During washing and sterilizing operations, it will ordinarily be undesirable to thus separate the parts of the assembly.

From the foregoing, it will be understood that among others the several objects of the invention as specifically aforenoted are achieved. Obviously, numerous changes in construction and rearrangement of the parts might be resorted to without departing from the spirit of the invention as defined by the claims.