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Publication numberUS3906932 A
Publication typeGrant
Publication dateSep 23, 1975
Filing dateFeb 27, 1974
Priority dateFeb 27, 1974
Publication numberUS 3906932 A, US 3906932A, US-A-3906932, US3906932 A, US3906932A
InventorsAyres Waldemar A
Original AssigneeBecton Dickinson Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Needle point for stopper penetration and method of making it
US 3906932 A
Abstract
A needle point particularly suited for insertion through a container stopper is not deflected to one side during penetration of the stopper. The needle is also non-coring during its passage through the stopper. The needle point has two diagonal faces instead of the usual one. The two faces are on opposite sides of the cannula body so that vector forces applied to each face during passage through a stopper are equal and opposite (therefore self-cancelling). During passage through the stopper, the needle continues in a straight path along the axial line of the needle without sideways deflection.
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United States Patent [191 Ayres [451 Sept. 23, 1975 NEEDLE POINT FOR STOPPER PENETRATION AND METHOD OF MAKING IT [75] Inventor: Waldemar A. Ayres, Rutherford,

[73] Assignee: Becton, Dickinson and Company,

East Rutherford, NJ.

22 Filed: Feb. 27, 1974 21 Appl. No: 446,346

[52] US. Cl. 128/2 F; 128/221; 128/272; 222/80; 72/369 [51] Int. Cl.*.... A61B 5/14; A678 7/24; B21D 9/00 [58] Field of Search 128/221, 339,218 N, 215, 128/218 NV, 218 D, 218 R, 218 DA, 218 M,

[56] References Cited UNITED STATES PATENTS 1,331,271 2/1920 MacGregor [28/221 3,181,336 5/1965 Schofield 128/221 X 3,327,710 6/1967 Freeberg et al.... 128/218 M 3,540,112 11/1970 Knox 128/221 X 3,594,296 7/1971 Derwall 128/221 X FOREIGN PATENTS OR APPLICATIONS 591,985 2/1960 Canada 128/221 Primary Examiner-Richard A. Gaudet Assistant ExaminerJ. C. McGowan Attorney, Agent, or Firm-Kane, Dalsimer. Kane, Sullivan and Kurucz [57] ABSTRACT A needle point particularly suited for insertion through a container stopper is not deflected to one side during penetration of the stopper. The needle is also non-coring during its passage through the stopper. The needle point has two diagonal faces instead of the usual one. The two faces are on opposite sides of the cannula body so that vector forces applied to each face during passage through a stopper are equal and opposite (therefore self-cancelling). During passage through the stopper, the needle continues in a straight path along the axial line of the needle without side ways deflection.

The method of fabricating the new needle comprises (1) making a first diagonal grind on the cannula, (2) rotating the cannula 180 and making a second diagonal grind, and (3) bending the cannula wall tips to bring them together at the axial line.

5 Claims, 8 Drawing Figures US Patent Sept. 23,1975 Sheet 1 of 2 3,906,932

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US Patent Sept. 23,1975 Sheet 2 of2 3,06,932

NEEDLE POINT FOR STOPPER PENETRATION AND METHOD OF MAKING IT BACKGROUND OF THE INVENTION With the double ended needle used in the Vacutainer tube supplied commercially by Becton, Dickinson and Company of East Rutherford, N..l., the usual diagonal bevel of the point which penetrates the rubber stopper frequently causes this needle to be deflected considera bly off-center. This occasionally results in the needle point failing to emerge into the central well of the stopper (instead, remaining embedded in the sidewall), whereupon no blood can enter the Vacutainer tube and the device is a failure. The diagonal face of the needle point is clearly the factor which causes this deflection off-center, in most cases.

This difficulty is also a design limitation in devising various kinds of stoppers, particularly for new and special purposes. To avoid the hazard of the above type of malfunction, present stopper design practice requires that a large central well, on the lower side of the stopper, be maintained, and that the roof of this well be horizontal, or substantially so, across its diameter. For various special types of Vacutainer tubes, the diameter of the central well could advantageously be made much smaller and, in some cases, provide a curved or conical roof. In these cases, if the needle were deflected substantially off-center during insertion, the needle point would be likely to remain embedded in the stopper sidewall, or within the increased thickness of the curved or conical roof, without emerging, thus preventing blood from flowing and causing failure of the device.

SUMMARY OF THE INVENTION It is a principal object of the present invention to provide a new needle point which eliminates the forces tending to produce needle deflection during stopper penetration thereby rendering it further feasible to permit increased design flexibility for producing new stoppers.

A further object is to provide a needle point for stopper penetration which is bilaterally symmetrical so that any deflection forces, due to diagonal surfaces, are made equal and opposite so that they are selfcancelling, about the long axis of the needle; the needle point does not core; the needle point is simple, inexpensive and practical to manufacture in large quantities; and the needle point does not produce excessive hemolysis.

Other objects and advantages will become apparent from the following detailed description which is to be taken in conjunction with the accompanying drawings.

DESCRIPTION OF THE DRAWINGS In the drawings FIG. 1 is a side elevational view ofa stopper penetrating needle at an intermediate stage of its manufacture with the opposed tips being spaced apart;

FIG. 2 is the final needle with the tips bent towards one another in substantially abutting relationship;

FIG. 3 is the bottom plan view of the partially formed needle point of FIG. ll;

FIG. 4 is the bottom plan view of the finished needle of FIG. 2;

FIG. 5 is an elevational view with certain parts broken away and removed and sectioned for clarity show ing the needle of the present invention penetrating a stopper of an evacuated tube;

FIG. 6 is a side elevational view of a quantity of needle blanks lying side by side between rigid plates in the course of manufacture, and one plate is moved laterally relative to the other to rotate the needles a predetermined amount;

FIG. 7 is a side elevational view illustrative of a grinding operation contemplated by the present invention; and

FIG. 8 shows the partially formed needle blank being supported between plates with bevel-faced squeeze bars moved towards one another to bend the tips in substantial abutting relationship to form the finished needle of FIG. 2.

DETAILED DESCRIPTION Referring initially to FIGS. I and 3, a partially formed needle blank for penetrating a stopper is initially provided with a pair of opposed bevel-faces l2 and 14 to form a pair of diametrically opposed pointed tips 16 and 18. The force vectors produced by these faces during stopper penetration are equal and opposite and hence self-cancelling with no lateral deflection being produced and an axial vector remaining. However in actual practice the needle blank 10 as shown with beveled faces 12 and 14 would cut a core out of the rubber stopper and consequently this would be objectionable.

It has been found that finished needles 40 having tips 16 and I8 bent inwardly into abutting relationship thereby defining beveled faces 12a and 12b and inwardly bent substantially abutting tips 16a and 18:! enter a stopper without any sideways deflection and without coring.

This penetration into stopper 20 of an evacuated tube 22 is depicted in FIG 5.

Turning now to FIGS. 6 to 8, :an exemplary manufacturing method is illustrated for producing the needles 10a illustrated in FIGS, 2, 4 and 5. Initially needle blanks 10 are disposed and pressed between rigid plates 24 and 26. The needles 10 lie side by side and upon lat' eral movement of one of the plates relative to the other, these needle blanks are adapted to rotate about their respective axes. In this fashion a grinding wheel may be actuated to pass across the tips of the group of needle blanks for purposes of grinding different faces at prede termined angles. Thus in FIG. '7 the needle blanks 10a are provided with bevel-face 12 by the grinding wheel 28. This wheel 28 will then grind bevel-face l4 following shifting of one of the plates 24 and 26 to rotate the needles 180. Alternatively the needles 10 may be held stationary and a second grinding wheel may be passed along the underside to grind the bevel-faces 14. Following the grinding of the two beveled faces 16 and 17, the rigid plates 24 and 26 could be moved relative to each other so that each of the needle blanks would be rotated about their respective axes to the position shown in FIG. 8. Then bevel-faced squeeze bars 30 and 32 would be reciprocated towards one another to bend the tips 16a and 18a as shown to produce the finished needle 10a. Thereafter the processes of deburring, cleaning, etc., could be followed in accordance with well known techniques in the needle art.

Although several somewhat preferred emobodiments of the invention have been disclosed and described in detail herein, it should be understood that this invention is in no sense limited thereby and its scope is to be determined by that of the appended claims What is claimed is:

l. A stopper penetrating needle including a tubular portion having a stopper penetrating end, the end having two beveled faces 180 apart from each other and in converging relationship defining a pair of opposed tips, the tips being bent toward one another whereby the points of each tip are substantially adjacent one another but not united to provide a stopper penetrating pointed end being substantially free of lateral deflection and coring when inserted into the stopper.

2. The invention in accordance with claim 1 wherein the points of the tips are bent into contact with one another.

3. A method of producing a stopper penetrating needle with an end free of lateral deflection and coring when inserted into the stopper including the steps of:

a. providing a plurality of needle blanks essentially in tubular form each having a stopper penetrating end;

b. grinding opposed convergent beveled faces in the tubular needle blanks at the stopper penetrating ends and thereby defining a pair of opposed pointed tips at this end; and

e. bending the tips towards one another into substantial engagement but not united with one another to form the finished stopper penetrating end.

4. The invention in accordance with claim 3 wherein the needle blanks are pressed between two rigid plates relatively movable in a lateral direction with respect to one another and in forming the beveled faces the needle blanks are rotated about their respective axes 180 to permit a grinding wheel to pass twice over the needle blank ends to form the two beveled faces.

5. The invention in accordance with claim 4 wherein the pressed needle blanks are moved about their respective axes through the relative lateral reciprocation of the plates to thereby expose the needle blank ends with beveled faces to a pair of bevel-faced squeeze bars for bending the pointed tips.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1331271 *Apr 2, 1918Feb 17, 1920Macgregor Instr CompanySyringe
US3181336 *Nov 15, 1961May 4, 1965Percival Schofield HubertMethod of producing the pointed end of a hypodermic needle
US3327710 *Nov 15, 1963Jun 27, 1967Santo John DeCombination hypodermic syringe and mixing container
US3540112 *Jan 18, 1967Nov 17, 1970Knox Lab IncMethod for manufacturing a hypodermic needle
US3594296 *Nov 14, 1967Jul 20, 1971Schumag Schumacher MetallwerkeApparatus for grinding the tips of injection needles
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4468224 *Jan 28, 1982Aug 28, 1984Advanced Cardiovascular Systems, Inc.System and method for catheter placement in blood vessels of a human patient
US4585446 *Mar 16, 1984Apr 29, 1986Joseph KempfDialysis needle
US4753641 *Sep 10, 1987Jun 28, 1988Vaslow Dale FEmergency medical needle
US4826492 *Jan 9, 1987May 2, 1989Hospal Ltd.Medical probe
US5207658 *Nov 14, 1991May 4, 1993Rosen Howard JPrick resistant medical needle for intravenous injections
US5254106 *Apr 17, 1992Oct 19, 1993Feaster Fred TFor performing surgery on a person's eye
US5478328 *Sep 2, 1993Dec 26, 1995Silverman; David G.For reducing risk of infection from material in hypodermic needles
US5520193 *Feb 22, 1994May 28, 1996Issei SuzukiBlood collecting needle with vein indicator
US5713874 *Aug 1, 1995Feb 3, 1998Kind-R-Ject Company, LlcCamouflaged injection needle
US6702790 *Oct 31, 2002Mar 9, 2004Chauncey F. RossHypodermic needle
US6702791Oct 26, 1999Mar 9, 2004Integ, Inc.Needle for body fluid tester
US6802199Jun 27, 2002Oct 12, 2004Integ, Inc.Needle for body fluid tester
US6936031Dec 12, 2001Aug 30, 2005Gambro Dasco S.P.A.Site for access to the inside of a channel, and corresponding cannula
US6945964 *Oct 14, 2003Sep 20, 2005Dianne L. HilderbrandHypodermic needle
US7076987Aug 5, 2004Jul 18, 2006Becton, Dickinson And CompanyMethod of producing tapered or pointed cannula
US7086266Aug 5, 2004Aug 8, 2006Becton, Dickinson And CompanyMethod of producing tapered or pointed cannula
US7458142 *Apr 18, 2005Dec 2, 2008Hans HaindlMethod for producing a cannula used specially for a spinal anaesthesia
US7645268 *Mar 25, 2004Jan 12, 2010Boston Scientific Scimed, Inc.Needles and methods of using same
US7776023Feb 3, 2009Aug 17, 2010Arkray, Inc.Method and implement for opening hole in soft material
US8382722 *Jun 30, 2008Feb 26, 2013Covidien LpBlunt tip vial access cannula and method for manufacture
US8720501Nov 6, 2008May 13, 2014Aseptic Technologies S.A.Pyramid shaped needle point
EP1466645A2 *Apr 8, 2004Oct 13, 2004Nipro CorporationConnector set for medical use and indwelling catheter set using such connector set
WO2004035118A1 *Sep 19, 2003Apr 29, 2004Haindl HansMethod for producing a cannula used specially for a spinal anaesthesia
WO2005072610A2Jan 24, 2005Aug 11, 2005Abbott LabLancet and method of manufacturing the same
WO2005102426A1 *Mar 9, 2005Nov 3, 2005Boston Scient Scimed IncNeedles
WO2007122254A1 *Apr 25, 2007Nov 1, 2007Novo Nordisk AsA cannula for an injection device, the cannula having a tapered end, and a method for manufacturing the same
WO2009060047A1 *Nov 6, 2008May 14, 2009Aseptic Technologies S APyramid shaped needle point.
Classifications
U.S. Classification600/577, 72/369, 604/274, 222/80, 604/411
International ClassificationB21G1/00, A61M5/162, A61M5/14, A61M5/32, B21G1/08
Cooperative ClassificationA61M5/3291, B21G1/08, A61M2205/195, A61M5/3286, A61M5/162
European ClassificationA61M5/162, B21G1/08