US2823675A - Hypodermic syringe assembly - Google Patents

Description

Feb. 18, 1958 J. SCIURBA I 2,823,675

HYPODERMIC SYRINGE ASSEMBLY Filed Nov. 4, 1957 2 Sheets-Sheet 1 INVENTOR.

JOSEPH SCH/H514 ATTORNEY Feb. 18, 1958 J. SCIURBA 2,823,675

HYPODERMIC SYRIWNGE ASSEMBLY Filed Nov. 4, 1957 2 Sheets-Sheet 2 I I BY: JOSEPH SC/URBA United States Patent HYPODERMIC SYRINGE ASSEMBLY Joseph Sciurba, Rutherford, N. J.

Application November 4, 1957, Serial No. 694,383

12 Claims. (Cl. 128-218) This invention relates to an improvement in: ahypodermicsyringe, and its principal. object is to-provide means for quickly assembling and disassembling the major combarrel of a hypodermic syringe and. to the top of the mating. plunger. To avoid the necessary machining operations and facilitate the. assembly of these parts has long been an. objective in this field of manufacture. By my invention the use of interlocking parts eliminates the need for threaded connections andenables a more rapid assembly or interchange of, parts.

Referring to, the drawings in which the same reference number refers to the same or a similar Part:

Figure 1 is an elevational view. of a completely assembledthypodermic syringe embodying'this invention.

Figure 2 is a top view of the plunger cap.

Figure 3 is a sectional view on line 3--3.- of Figure 2, showing attachrnent of the cap to the top of the plunger.

Figure 4. is a sideview of the top of the capped plunger.

Figure 5- is a. bottom view of, the capped plunger shown in Figure 4.

Figure 6 is a side elevational view ofthe upper portion of the syringe barrel prior to. bringing the barrel. cap into final p s n- Figure 7 is a topview of the barrel partly in section showing the barrel cap in, assembled position.

. Figure 8- is a sectional view online 8-8 of Figure/7,.

EiguresQ to 16, inclusive; illustrate a modification. of the barre p Figure, 9; isa top view of. a barrel partly in section, showing the-modifiedbarrel cap in unlocked position.

Figure 10. is, a sectional view Qn-line 10-10-10 o.f Figure 9..

Figure ll. is similar. to Figure 9, but. shows the barrel cap in locked position.

Figure 12 is a bottom view OfAOIllY'. the barrel. cap: locking rin Figure 13 is a sectional, view on. line. Ill-13.- of F ura Figure 14. is a top view. of the barreLcap.

Figure. 15 is a. sectional view. on line. 15-15. of Figure..1 4.

Figure 16 is; an isometric view of the seatingring.

. Thehy odermic syringfi, asillustratedinFigure.1,, is shown without. the conventional. needle fattachmena; As Shawn. it. consists of the, two. conventibnalibasic. parts,

2,823,675 Patented Feb. s,

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namely, glass barrel 1 and glass plunger 3. Removably secured tothe. top of barrel 1 is metal barrel top 2, having a pair of finger accommodating rings 18'. Removably assembled to the top of plunger 3 is metal plunger cap 4 surmounted by finger accommodating ring 5-.

Plunger cap 4, as best shown in Figures 2 to 5; inelusive, has post 6 rising from the center of its upper surface and towhich. ring 5 is fixed. Atop; the upper surface of cap 4' and surrounding the base of post 6 fear circular spring strip 11, fixed at one end to such upper surface and having at its free end adepending" catch 12 free to. move vertically in a slot in the edged the upper surface.

Side wall 7 of cap 4 extends but half way around the cap on the side opposite catch 12.. The bottom edge of side wall 7' turns inwardto forma U-shaped opening having forked ends 8 and 8a separated by a widthsuffici'ent to pass the body ofplunger 3 between them. The separation between the top surface of cap 4 and forks 8 and 8a is sufficient to accommodate flange 9 of'plunge'r 3. Located between the top surface of flange 9 and the adjacent under surface of cap 4 is spring disc 10" which tends to hold these surfaces apart and to resist movement between them.

Reference to Figures 1 through 5 will indicate how plunger cap 4 is assembled to the flange of plunger. 3. By lifting catch 12 againstthe resistance of spring strip 1 1 to the broken line position shown in Figure 3, clear passage is provided for the edgewise admission of flange 9 between: the top surface of cap 7 and forks 8 and 8a. The distance between: forks 8 and 8a will admit plunger 3 and after it has been brought against the resistance of disc 10 to the edge of the U-shapecl opening, catch 12 will drop' in place against the exposed edge of flange 9, firmly holding plunger cap 4 to the top of plunger 3.

Barrel 1 at the top isprovided with flange 1' 3 asmay be best observed. in Figure6. Two parallel cuts in the periphery of flange 13' provide two parallel straight sides 14 in flange. 132 Mounted immediately below flange 13-is locking piece 15 which partially encircles and clasp's barrel 1. Projecting upward from locking pieces 15 are spring clips 17 terminating in curved-tongues 16.

On opposite sides of barrel cap 2 are finger rings 18, preferably integral with cap 2. The lower portionof barrel'cap 2 terminates in inwardly tapered fingers 21', adapted to bear against the outer surface of the body of barrel. 1 in frictionfit engagement.

The top of barrel cap 2: is adapted to receive andhold flange 13- within' it. The top" surface of barrel" cap 2 is sized. and sh'apedto admit flange 1'3 when' in registry with it. Each straight side of the opening in the top surface of barrel cap 2*i's indented withnotch 19 which will accommod'ate: inwardly-pressed clip 17 when flange 13 is admitted to itsseatingi within cap 2 Stop pin 20' may be incorporated in barrel cap 2 to limitthe movement, in assembling,zof'fiange 1'3" with respect to cap 2', by projectinginto the'pathof: clip 17.

Between the seating ledgeof barrel: cap 2" and' the bottom of flange: 13, resilient ring 22' is placed to serve as-a; cushion and spacer between. them.

To assemblebarrel cap 2 to barrel. 1-, locking piece -15='is first attached, asillustrated beneath flange'13. Resilient ring 22' is. next seated in the. top of cap 2. The lower end of barrel 1: is then inserted intothe top opening .of, barrel-cap 2' and lowered to the-position shownwin Fig,-

ure 6. Flange13-is then-placed in registry with the-top opening of cap 2 and. passed therethrough, spring clips 17: being pressedinwardly; as they passthrough notches 19. v After. flange 13 is.seated against the resistanceof resilientrring. 22,. bar-relv 1. is twisted. to the position shown in. Figure 7 whereby. the round portions of. flange 13-- are brought under the overhang of the straight sides of the top opening of cap 2 is friction fit engagement therewith. Stop will limit the twisting movement.

Barrel cap is removed by reversing the foregoing steps. Only when clips 17 are in registry with notches 19 may the barrel be removed and then against the spring catch resistance of clips 17.

The modifications in the barrel cap are shown in Figures 9 to 16, inclusive.

Certain parts remain unchanged, such as glass barrel 1 with flange 13 and its straight sides 14. Also unchanged is locking piece 15 with spring clips 17 and tongues 16.

The modified barrel top consists basically of two pieces, body 27 and locking ring 23. Body 27 has fingers 21 to grip barrel 1 and finger rings 18 preferably integral with it.

The circular top opening of body 27 has recess 32 to accommodate resilient; ring 29, shown in Figure 16, and flange 13 of barrel 1. Ring 29 has upstanding tabs 30 and is prevented from moving circularly on its seat by a pair of slots 31 let into the inner .wall of recess 32. A 81?: provides a seat for the outer vertical edge of each ta Spaced flanges 28 on the outer surface of body 27 at its top edge cooperate with spaced flanges inside of ring 23 at its bottom edge to afford means for slidably engaging ring 23 to body 27. Figures 14 and 15 illustrate body 27 without ring 23.

Referring to Figures 12 and 13, ring 23 is shown by itself. The top opening of ring 23 has straight sides with notches 24 to permit flange 13 and clips 17 to pass. Undercut 26 provides a track for flanges 28 of body 27.

The modified barrel cap once assembled is not thereafter disassembled in order to be mounted on a barrel. It contains in recess 32, ring 29 fixed by the location of tabs 30 between a pair of slots 31, and is surmounted by partially rotatable ring 23. Ring 23, once it has been engaged with body 27 is prevented from accidental disengagement by stop screw 33 threaded into opening 34, located midway between adjacent flanges 25. Thus, the movement of ring 23 relative to body 27 is limited to the .arc between flanges 25.

To assemble the modified barrel cap to barrel 1, ring 23 is rotated to place a notch 24 in registry with the opening between tabs 30 of ring 29. Next, barrel 1 is lowered into the opening of ring 23 until it is seated on ring 29 and a clip 17 is lodged between tabs 30. Turning ring 23 will cause it to firmly grip flange 13.

It will be noted that with the modified barrel cap the barrel remains fixed and the rotation of ring 23 secures the barrel to the cap. In the first illustration given herein, it is the barrel that is rotated to place it in secured position.

Many modifications may be made in the construction shown and described, and it is not intended by such descriptions to limit the scope of this invention.

What I claim is:

1. In a hypodermic syringe finger grip mounting means consisting of a plunger and cap assembly comprising a cylindrical plunger having an encircling flange at one end; a cap having a circular top coextensive with the flanged end of the plunger; a curved side wall depending from the circular top for a portion of its periphery not in excess of 180 degrees with its inner surface in contact with the outer edge of the plunger flange; a bottom member extending from the curved side wall parallel with the circular top and embracing a portion of the plunger flange therebetween; a spring catch on the circular top engaged with the plunger flange; and a finger grip mounted atop the circular top; and a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encirciing its open top; a cut-away section in such flange; a band partially encircling the barrel beneath the flange;

4 v p l an upstanding flexible member attached to such band curved about the cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; finger members extending downward from the collar in friction fit engagement with the barrel; and an inwardly turned edge on top of the collar forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having a notch therein adapted to accommodate passage of the upstanding flexible member; and a pair of finger grips extending from the collar on opposite sides thereof.

2. In a hypodermic syringe, a plunger and cap assembly comprising a cylindrical plunger having an encircling flange at one end; a cap having a circular top coextensive with the flanged end of the plunger; a curved side wall depending from the circular top for a portion of its periphery not in excess of degrees with its inner surface in contact with the outer edge of the plunger flange; a bottom member extending from the curved side wall parallel with the circular top and embracing a portion of the plunger flange therebetween; a spring catch on the circular top engaged with the plunger flange; and a finger grip mounted atop the circular top.

3. In a hypodermic syringe, a plunger and cap assembly comprising a cylindrical plunger having an encircling flange at one end; a cap having a circular top coextensive with the flanged end of the plunger; a curved side wall depending from the circular top for a portion of its periphery not in excess of 180 degrees with its inner surface in contact with the outer edge of the plunger flange; a U-shaped bottom member extending from the curved side wall parallel with the circular top and embracing a portion of the plunger flange therebetween; a spring catch on the circular top engaged with the plunger flange; and a finger grip mounted atop the circular top.

I -4. In a hypodermic syringe, a plunger and cap assembly comprising a cylindrical plunger having an encircling flange at one end; a cap having a circular top coextensive with the flanged end of the plunger; a resilient member disposed between the end of the plunger and the underside of the circular top; a curved side wall depending from the circular top for a portion of its periphery not in excess of 180 degrees with its inner surface in contact with the outer edge of the plunger flange; a U-shaped bottom member extending from the curved side wall parallel with the circular top and embracing a portion of the plunger flange therebetween; a spring catch on the circular top engaged with the plunger flange edge opposite the embraced portion of the flange; and a finger grip mounted atop the circular top.

5. In a hypodermic syringe; a plunger and cap assembly comprising a cylindrical plunger having an encircling flange atone end; a cap having a circular top coextensive with the flanged end of the plunger; a resilient disc disposed between the end of the plunger and the underside of the circular top; a curved side wall depending from the circular top for a portion of its periphery not in excess of 180 degrees with its inner surface in contact with the outer edge of the plunger flange; a U-shaped bottom member extending from the curved side wall parallel with the circular top and embracing a portion of the plunger flange therebetween; a spring catch on the circular top engaged with the plunger flange edge opposite silient disc disposed between the end of the plunger and the underside of the circular top; a curved side wall depending from the circular top for a portion of its periphery not in excess of 180 degrees with its inner surface in contact with the outer edge of the plunger flange; a U-shaped bottom member extending from the curved side wall parallel with the circular top and embracing a portion of the plunger flange therebetween; a flexible circular strip on the circular top, secured at one end thereto and at the other end having a dependent portion beyond the edge of the top and engaged with the plunger flange; and a finger grip mounted atop the circular top.

7. In a hypodermic syringe a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encircling its open top; a cut-away section in such flange; a band partially encircling the barrel beneath the flange; an upstanding flexible member attached to such band curved about the cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; a pair of finger grips extending from the collar on opposite sides thereof; finger members extending down ward from the collar in friction fit engagement with the barrel; and an inwardly turned edge on top of the collar forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having a notch therein adapted to accommodate passage of the upstanding flexible member.

8. In a hypodermic syringe a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encircling its open top; a cut-away section in such flange; a band partially encircling the barrel beneath the flange; an upstanding flexible member attached to such band curved about the cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; a pair of finger grips extending from the collar on opposite sides thereof; finger members extending downward from the collar in friction fit engagement with the barrel; an inwardly turned edge on top of the collar forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having a notch therein adapted to accommodate passage of the upstanding flexible member; and a resilient ring positioned between the inner surface of the collar and the bottom edge of the flange.

9. In a hypodermic syringe a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encircling its open top; a pair of cut-away sections in such flange; a band partially encircling the barrel beneath the flange; a pair of upstanding flexible members attached to such band each being curved about a cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; a pair of finger grips extending from the collar on opposite sides thereof; finger members extending downward from the collar in friction fit engagement with the barrel; an inwardly turned edge on top of the collar forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having notches therein adapted to accommodate passage of the upstanding flexible members, and a resilient ring positioned between the inner surface of the collar and the bottom edge of the flange.

10. In a hypodermic syringe a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encircling its open top; a pair of cut-away sections in such flange; a band partially encircling the barrel beneath the flange; a pair of upstanding flexible members attached to such band, each being curved about a cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; a pair of finger grips extending from the collar on opposite sides thereof; finger members extending downward from the collar in friction fit engagement with the barrel; an inwardly turned edge on top of the collar forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having notches therein adapted to accommodate passage of the upstanding flexible members; a resilient ring positioned between the inner surface of the collar and the bottom edge of the flange; and a stop inward of the collar adapted to limit rotary movement of the barrel with respect thereto.

11. In a hypodermic syringe a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encircling its open top; a cut-away section in such flange; a band partially encircling the barrel beneath the flange; an upstanding flexible member attached to such band curved about the cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; a pair of finger grips extending from the collar on opposite sides thereof; finger members extending downward from the collar in friction fit engagement with the barrel; an interrupted flange on the external surface of the collar adjacent its top; a ring with an interrupted internal flange adapted to engage with the flange of the collar; an inwardly turned edge on top of the ring forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having a notch therein adapted to accommodate passage of the upstanding flexible member.

12. In a hypodermic syringe a barrel and barrel cap assembly comprising a cylindrical barrel having an external flange encircling its open top; a pair of cut-away sections in such flange; a band partially encircling the barrel beneath the flange; a pair of upstanding flexible members attached to such band, each being curved about a cut-away edge of the flange a spaced distance therefrom; a cap member having a collar encompassing the barrel, band and flange; a pair of finger grips extending from the collar on opposite sides thereof; finger members extending downward from the collar in friction fit engagement with the barrel; an interrupted flange on the external surface of the collar adjacent its top; a ring with an interrupted internal flange adapted to engage with the flange of the collar; an inwardly turned edge on top of the ring forming an opening coaxial with the barrel and substantially identical with the periphery of the flange and having notches therein adapted to accommodate passage of the upstanding flexible members; and a resilient ring positioned between the inner surface of the collar and the bottom edge of the flange.

Creasy Nov. 17, 1931 Kohl Apr. 3, 1956

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