US2674246A - Hypodermic syringe - Google Patents

Description

April 6, 1954 E. J. BOWER 2,674,246

HYPODERMIC SYR INGE Filed March 14, 1952 INVENTOR Earl Jfiower ATTORNEY5 Patented Apr. 6, 1954 UNITED STATES PATENT OFFICE HYPODERMIC SYRINGE Earl J. Bower, Wilkes-Barre, Pa.

Application March 14, 1952, Serial No. 276,558

3 Claims. 1

This invention relates to hypodermic syringes.

An object of this invention is to provide in combination with a hypodermic syringe and needle, means whereby initial pressure may be applied to the area which is to be penetrated by the needle so as to lessen the shock to the patient when the needle punctures the skin.

Another object of this invention is to provide an attachment for a hypodermic syringe and needle which will encompass the needle and serve as a guide for the needle and syringe.

A further object of this invention is to provide an attachment of this kind which includes a relatively soft pressure member adapted to be pressed against the part to be punctured, the pressure member projecting beyond the needle so that a timid or highly sensitive patient will not be scared when the needle is projected into the desired spot.

A further object of this invention is to provide in a hypodermic syringe a combined guide and pressure member so that the needle may be projected into the patient without the patient jerking away when the needle punctures the tissue.

With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claims.

In the drawing:

Figure 1 is a detailed side elevation of a hypodermic syringe having an attachment mounted thereon constructed according to an embodiment of this invention.

Figure 2 is a fragmentary sectional view taken on the line 2--2 of Figure 1.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2.

Referring to the drawing, the numeral Hldesignates generally a conventional hypodermic syringe embodying a cylinder II with a plunger [2 slidable therein. The forward end of the cylinder l I is provided with a reduced nozzle i3, and a hypodermic needle l4 having a socket H5 at its inner end is mounted on the nozzle l3.

In order to provide a means whereby the needle [4 may be enclosed and, at the same time, whereby pressure may be applied on the part into which the needle is to be projected, I have provided cylindrical member l6 which removably engages about the forward portion of the syringe cylinder H. The tubular member l6 has mounted in the forward end thereof a plug I! having a central bore l8, and the outer end of the plug 11 has formed integral therewith a relatively soft head [9. As shown in Figure 1, the forward end of the tubular member I6 is disposed on an oblique angle, and the head I9 is also disposed on an oblique angle so that the tubular member It may be projected into the mouth of a patient with the head l9 disposed fiatwise with respect to the part into which the needle is to be projected.

A relatively small diameter tube 20 encompasses the greater portion of the needle l4 and is formed at its inner end with an enlarged socket 2| telescoping over the needle socket l5. The outer diameter of the tube 20 is such that this tube may readily slide into the bore I8 when the syringe II, with the needle, is moved forwardly to operative position.

A spring 22 engages loosely about the tube 20 and bears, at its forward end, against the inner end of the plug I1 and bears, at its opposite or inner end, against the socket 2|. The spring 22 provides a means whereby the tubular member or guide IE will be normally disposed in a covering position with respect to the needle i i.

In the use of this device, the tubular member [6 is engaged about the syringe cylinder ii, and the tubular member I6 is then extended into the mouth of the patient against the part which is to be punctured by the needle. Pressure is applied to the cushioned head It, and then the cylinder ll may be pushed inwardly until the needle l4 punctures the tissue which is pressed by the head l9. The plunger I2 may then be moved inwardly to force the liquid through the needle l4 into the part which is punctured by needle l4. This attachment will provide a means whereby initial pressure may be applied to the patient on the tissue or area which is to be punctured so that the subsequent puncturing of the tissue by the needle will not cause the patient to become scared. Furthermore, in view of the application of pressure on the spot which is to be punctured, the patient will not readily feel the needle when the needle is puncturing the tissue.

The attachment hereinbefore described is of such character that it can be readily sterilized at the time the needle and syringe are sterilized, and the needle will not readily be made unsterile before the needle has been used.

While described herein as for a hypodermic syringe, it will be understood this is meant in a generic sense as obviously this may apply to other syringes for other uses. The head it may also if desired, be made of absorptive material to hold an antiseptic preparation or may be impregnated with antiseptic matter or alterna- 3 tively, a material to induce a superficial anaesthesia for the needle penetration. The shape of the head I9 is variable although as shown, it is in the most desirable form.

I do not mean to confine myself to the exact details of construction herein disclosed, but claim all variations falling within the purview of the appended claims.

What is claimed is:

1. A pressure applying attachment for a hypodermic syringe having a needle comprising an elongated tubular member loosely engageable.

over the forward end of the syringe andencompassing said needle, a plug in the forward end of said member having a bore coaxial; with the needle, a relatively soft cushion, head carried by said plug, said needle including'aninner tube loosely disposed about the needle, a socketcarried by said tube engaging the inner end of said needle, and. a spring about said. tube. bearing at its outer end against said plug andbearing at its inner end against said. socket, said spring normally holding saidmember in needle encompassing position.

2, A pressure applying attachment fora hypodermic syringe having a needle, said attachment comprising an elongated tubular member loosely engageable over the forward, end of the syringe and encompassing said needle, a plug in the forward end of said member having a bore coaxial with the needle, and a relatively soft cushion head carried by said plug, said head carrying superficial anaesthesia inducing material.

3. An attachment for use with a hypodermic or like syringe of the type having a cylinder, a plunger, a needle, and means for securing the needle to the cylinder, said attachment comprising an elongated open ended tubular member adapted to fit at one end over and to loosely engage an end portion of said syringe cylinder and to encompass said needle and needle securing means, said tubular member having at its other end extending partially therein, a soft-nosed plug having an axial bore in alignment with said syringe needle, a lengthwise extending coiled spring disposed within said tubular member and having one end abutting the inwardly extended end of said plug, and a second elongated open ended tubular member mounted in said spring and onsaid needle securing means and encompassing said needle spacedly from said plug, said attachment being so constructed and assembled relative to said syringe that in the use thereof saidplug nose maybe utilized to position said syringe and apply localized pressure to the area surrounding the selected point of injection and said spring will serve to instantly retract said needle, and whereby said second tubular member will act to guide and aid in preventing bending and breakage of said needle and whereby said needle may be rapidly inserted into and withdrawn from the patient being treated.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,845,036 Busher Feb. 16, 1932 1,921,034 La Marche Aug. 8, 1933 2,512,882 Truesdale June 27, 1950 2,617,359 Van Horn et al Nov. 11, 1952 FOREIGN PATENTS Number Country Date 455,036 France May 10, 1913

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