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Publication numberUS422436 A
Publication typeGrant
Publication dateMar 4, 1890
Filing dateNov 13, 1889
Publication numberUS 422436 A, US 422436A, US-A-422436, US422436 A, US422436A
InventorsGustav Otto
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hypodermical syringe
US 422436 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

- G. OTTO.


Patented Mar ATTORNEYS N4 PETERS Phuloiiihngnpher, Washinglum ac.




SPECIFICATION forming part of Letters Patent No. 422,436, dated March 4, 1890.

Application filed November 13,1889. Serial No. 330,151. (No model.)

To all whom it may concern.-

Be it known that I, GUSTAV OTTO, a citizen of the Unit-ed States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented'certain new and useful Improvements in Hypodermical Syringes, of which the following is a specification, reference being had to the accompanying drawings, forming part of the same.

My invention relates to hypoderlnical syringes, and has for its object the providing of a point or needle of such syringes of improved construct-ion.

My invention is illustrated in the accompanying drawings, in which similar parts in the several views are indicated by similarletters.

Figure 1 is a front View of my improved needle or point; Fig. 2 a cross sectional View of the same through the line 0 c, Fig. 1. Figs. 3 and 4 represent two of the old forms of needles or points for hypodermical syringes.

In Figs. 3 and at, a and o represent the points of the old needles, d d, the body, which is soldered in the cap at f f The needle represented in Fig. 4 differs from that shown in Fig. 3 in that it has a re-enforcing sleeve 6' at its lower end.

In Figs. 1 and 2 one form of my improved needle is shown. It consists of a tube E, drawn out to a smaller diameter (Z and furnished with a hollowed point a. The shank E of the tube is inserted in the nozzle g and soldered to it. I

The needle or point now used in hypodermical syringes consists of a cylindrical tube of steel or other suitable metal, of adiameter sufiiciently small for the purposes for which the syringe is to be used. At one end the tube is sharpened and partially hollowed, and the other end of the tube is inserted in and soldered to the cap or nozzle of the syringe. It is found that such points or needles are weak at the joint between the nozzle and tube and frequently break, thus rendering the syringe worthless. Various plans to avoid this breaking have been suggested, one of which (represented in Fig. 4) consisted in reenforcing the needle by adding a sleeve; but this has been found to simply transfer the weak point in the needle to another position, and does not avoid the breaking.

In my invention I take a tube of steel, gold, or other suitable metal, of a diameter to fit the nozzle of the syringe, and I draw it out toward the point to a taper, of a diameter small enough for the purposes to which the needle is to be adapted. The point at which I begin to draw out the tube is represented in the drawings as about one-half the distance between the two ends, and this has been found in use to be practicable; but the tube can be drawn out at any point, as occasion may require.

The advantages of my improved needle are many. It can be cheaply and easily made and is uniformly strong at all points. In my improved needle the greater diameter of the tube at the shank renders the needle as strong as if it had been re-enforced at that point by a'sleeve. The tapering or drawing out decreases the diameter of the tube without impairing its strength, and hence the needle is uniformly strong at all points. The bore of the tube in my improved needle is larger at the shank than at the point, the two sizes of bore being united by a tapering bore, and for this reason the needle is less apt to clog and the fluid flows more evenly and continuously, as the greater bore at the shank serves as a reservoir. 7

Having fully described my invention, What Ivdesire. to secure and claim by Letters Patent is- In a hypodermical or similar syringe, a needle consisting of a metallic hollow tube forming on the interior two boresone the original bore of the tube, the other a smaller bore on which the point is formed-the bores meeting on tapering lines, substantially as described.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2904045 *Apr 14, 1958Sep 15, 1959Thomas OwingsHypodermic needles
US4767407 *Jul 14, 1986Aug 30, 1988Foran Scot JHypodermic needle, catheter and method
US5951528 *Mar 24, 1997Sep 14, 1999Parkin; AdrianHypodermic needles
US7252653 *Jan 25, 2002Aug 7, 2007Terumo Kabushiki KaishaLiquid injection needle and liquid injection device
US7632253Dec 6, 2004Dec 15, 2009Terumo Kabushiki KaishaInjection needle and injection apparatus
US20040078008 *Jan 25, 2002Apr 22, 2004Mieko UedaLiquid indection needle and liquid injection device
US20050059939 *Sep 17, 2003Mar 17, 2005Perkins James T.Phacoemulsification needle
US20050096603 *Dec 6, 2004May 5, 2005Terumo Kabushiki KaishaInjection needle and injection apparatus
EP1353716A1 *Jan 25, 2002Oct 22, 2003Terumo Kabushiki KaishaLiquid injection needle and liquid injection device
EP1547635A1 *Jan 31, 2001Jun 29, 2005Terumo Kabushiki KaishaInjection needle and injection apparatus
Cooperative ClassificationA61M5/32, A61M5/329
European ClassificationA61M5/32F