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Publication numberUS3439675 A
Publication typeGrant
Publication dateApr 22, 1969
Filing dateJun 14, 1966
Priority dateJun 14, 1966
Publication numberUS 3439675 A, US 3439675A, US-A-3439675, US3439675 A, US3439675A
InventorsMartin Bruce Cohen
Original AssigneeBecton Dickinson Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Deformable needle assembly
US 3439675 A
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Description  (OCR text may contain errors)

April22, 1969 M- B COHEN DEFORMABLE NEEDLE ASSEMBLY Filed June 14, 1966 INVENTOR.

#4 7/0 520:! cabana ATI R /S United States Patent 3,439,675 DEFORMABLE NEEDLE ASSEMBLY Martin Bruce Cohen, Maywood, N.J., assignor to Becton Dickinson and Company, Rutherford, N.J., a corporation of New Jersey Filed June 14, 1966, Ser. No. 557,533 Int. Cl. A61m /32 US. Cl. 128-239 3 Claims ABSTRACT OF THE DISCLOSURE This invention relates to an improved needle assembly usable with any one of a number of syringes and, more particularly, to an ophthalmic needle assembly of this type capable of being economically produced and efficiently shaped for the desired use by merely bending it by hand preparatory to use, while being sufliciently low in cost thereby permitting complete disposability of the entire syringe unit after a single use.

Normally, the needle assemblies available for opthalmic use are costly to manufacture because they are delicately constructed and generally fabricated with a special blunt tip and surrounding areas. A needle assembly of any other type could have adverse effects and lead to permanent damage. The special blunt tip of the typical ophthalmic needle assembly has been carefully manufactured to avoid undesirable sharp edges and yet still possess the desired characteristics for use in ophthalmic applications. Certain ophthalmic needle assemblies are preformed into special shapes and curvature to satisfy particular requirements. In the case of prior art needle assemblies, this unfortunately has resulted in increased costs to an extent that it would be unreasonable to dispose of at least the needle assembly after a single use.

It has been proposed by the prior art to construct the needle assembly of a bendable material thereby permitting it to be formed into the desired shape prior to use. However, contamination of an otherwise sterile needle assembly has frequently occurred during the bending process.

With the foregoing in mind, it has been demonstrated that there is a need for a needle assembly for ophthalmic use in which the required special tip may be economically produced, the needle assembly may be constructed of a bendable material capable of being bent by hand without danger of contamination while also being capable of use with many types of syringes, and the resulting needle assembly may be economically produced and efficiently used so as to lend itself to disposability after single use.

It is, therefore, an object of this invention to provide a disposable ophthalmic needle assembly which incorporates an inexpensive, unpointed cannula, covered by a plastic sheath and which can be economically manufactured.

Another object of this invention is to produce a needle assembly of this type with a shield whereby the assembly may be bent by hand into the desired shape immediately prior to use and before removal of the shield, thereby eliminating the danger of contamination of the needle assembly during handling and the bending process.

Still another object of this invention is to provide a needle assembly of this type usable with many types of 3,439,675 Patented Apr. 22, 1969 syringes, including a prefilled disposable ophthalmic syringe thereby providing a completely marketable and disposable unit.

With these and other objects in mind, reference is had to the attached drawings of the invention in which:

FIG. 1 is a longitudinal sectional view showing the needle assembly of the invention connected to one of a wide variety of available syringes, the combination having particular application as an ophthalmic syringe;

FIG. 2 is an enlarged fragmentary sectional side view of the needle assembly of FIG. 1 with phantom lines depicting the assembly in the process of bending to the desired shape;

FIG. 3 is a similar enlarged fragmentary sectional side view showing the shape of the cannula and sheath after it has been bent by hand and the shield has been removed;

FIG. 4 is an enlarged cross-sectional view of the needle assembly taken along the plane of line 4-4 of FIG. 2;

FIG. 5 is an enlarged sectional end view of the cannula and plastic sheath only taken along the plane of line 5-5 of FIG. 2; and

FIG. 6 is a longitudinal sectional view showing the needle assembly of the invention mounted on a conventional hub.

In FIG. 1, a needle assembly 20 of this invention is shown attached to one of the many types of syringes with which it may be used. The illustrated exemplary embodiment embraces a by-pass syringe 21 adapted to store and then release the fluid for use. The syringe 21 includes a barrel 22 which contains an elongated by-pass slot 23 cooperable with a forward stopper 24, an open rear end 25 closed by rear plunger 26 and a forward discharge end 27. The chamber 28 between stopper 24 and plunger 26 is adapted to receive the selected medicament.

The illustrated needle assembly 20 is secured to the forward end 27 of the barrel but it should be understood that any one of a number of fixed or detachable connecting structures may be employed in associating the needle assembly 20 with the typical forward reduced boss 29 con taining bore 30. With this in mind, the needle assembly 20 of the illustrated embodiment is comprised of a hollow, tubular cannula 31 having an unpointed end 32 and its entire exposed outer surface covered by a tubular plastic sheath 33. The shank end 40 of the cannula 31 fits into and is held in bore 30 of the reduced cylindrical boss 29 extending forwardly of the barrel 22. The sheath 33 abuts against the tip of the cylindrical extension 29 of the barrel 22. The sheath 33 also extends beyond the unpointed end of the cannula 31, where it forms a rounded closed blunt end 35. A pair of small diametrically opposed holes 36 in the sheath 33 and at right angles to the axis of the cannula 31 are located between the tip of the cannula 31 and the end 35 of the sheath 33. Under these circumstances, the medicament, when released from chamber 28 through by-pass slot 23, will pass through bore 30 into the lumen 41 of the cannula 31 and, finally, through the two small holes 36 in the sheath 33.

The needle assembly 20 is protected by a plastic tubular shield 37. The open rear end of the shield 37 is mounted on the outer surface of the cylindrical boss 29 of the barrel 22. The other end of the shield is closed and defines a substantially hemispherical configuration. By grasping the shield 37 before its removal, the needle assembly 20 may be bent to substantially any desired or prescribed shape typified by the curvature illustrated in FIG. 3. In this connection, any of a variety of metals or plastics may be used for cannula 31 capable of being manually bent and of retaining the induced shape. Naturally, this manual bending is most advantageously accomplished while the shield 37 is still mounted over the needle assembly 20 3 thereby avoiding the danger of contamination of the exposed parts of the needle assembly 20.

In reference to FIG. 6, it can be seen that the needle assembly 20 may be mounted on a conventional type of hub 46 and fixed in position by any common adhesive compound known to the art. The needle assembly 20 with hub 46 may be. associated with a syringe. In this manner, the needle assembly 20 with hub 46 may be independently packaged and used with a variety of difi'erent syringes, ampoules and the like.

The elements of the needle assembly 20 in FIG. 6 correspond to the elements of the needle assembly 20 depicted in FIGS. 1-5. Accordingly, they Will be similarly numbered.

Basically, this invention provides an economically manufactured low-cost needle assembly for ophthalmic use which may be used with many types of syringes, whether prefilled or not, to form a completely disposable ophthalmic syringe assembly. Economy of production allows for complete disposability after single use, whereas, in the past, ophthalmic needle assemblies simply did not lend themselves to disposability mainly because of their high cost. As will be appreciated, the needle assembly of this invention is also efiicient to use in that it may be bent by hand into any desired shape by merely grasping and bending the protective shield 37 covering the associated cannula 31 and sheath 33. In this manner, contamina tion of the needle assembly is prevented because the needle assembly 20 is not required to be touched at any time prior to use to conform it to the desired shape.

Thus, the above-mentioned objects of the invention, among others, are achieved. The range and scope of the invention are defined in the appended claims.

I claim:

1. A disposable needle assembly for ophthalmic use comprising an unpointed metal cannula, having a shank and unpointed end, a plastic sheath covering said cannula, extending from its shank to its unpointed end, said sheath extending beyond the unpointed end terminating in a rounded sealed surface, and at least one hole in the sheath intermediate the unpointed end of the cannula and the rounded sealed end of the sheath thereby providing a needle assembly of low cost construction which is economical to produce, both said cannula and sheath being bendable so as to be bent to a selected configuration, bending means surrounding the needle assembly and adapted to be manually grasped to facilitate bending of the needle assembly to a selected configuration without contaminating the needle assembly, and said cannula and sheath being constructed of such material as to maintain said selected shape after said bending means is released.

2. A needle assembly in accordance with claim 1 wherein the bending means includes a bendable, hollow, cylindrical shield covering the needle assembly, said shield having a rounded sealed end adjacent the rounded sealed end of the needle assembly, the opposite open end of the shield adapted to fit and seal itself to the barrel of the syringe.

3. A needle assembly in accordance with claim 1 wherein said needle assembly is attached to a prefilled by-pass syringe.

References Cited UNITED STATES PATENTS 1,125,887 1/1915 Schimmel 128-221 1,155,848 10/1915 Tyrrell 128-239 XR 2,705,008 3/1955 Melton.

3,094,122 6/ 1963 Gauthier et al 128-221 3,225,763 12/ 1965 Waterman 128-261 XR 3,330,282 7/1967 Visser et al 128-218 XR RICHARD A. GAUDET, Primary Examiner.

M. F. MAJESTIC, Assistant Examiner.

US. Cl. X.R.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1125887 *Jan 19, 1915 Hypodermic syringe.
US1155848 *Sep 17, 1914Oct 5, 1915Charles A TyrrellRectal syringe.
US2705008 *Jan 21, 1954Mar 29, 1955Morton NewburgerMedication cartridge-needle-needle guard unit for hypodermic syringe
US3094122 *Jan 18, 1961Jun 18, 1963Gauthier Theophile EFlexible cannula and intravenous needle combined
US3225763 *Jun 18, 1962Dec 28, 1965Chesebrough PondsMedicinal injector
US3330282 *Aug 21, 1964Jul 11, 1967Upjohn CoCombination syringe and vial mixing container
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4573979 *Aug 23, 1984Mar 4, 1986Innovative Surgical Products, Inc.Irrigation/aspiration tip
US4753636 *Mar 4, 1986Jun 28, 1988Endocon, Inc.Subcutaneous implant kit
US4813928 *Apr 9, 1987Mar 21, 1989Hoechst Japan LimitedNozzle for tissue adhesive
US4990140 *Nov 13, 1989Feb 5, 1991Johnson & Johnson Medical, Inc.Flexible spray tip for syringe
US4993941 *Apr 29, 1988Feb 19, 1991Nissho CorporationDental irrigating needle
US5053020 *Apr 6, 1990Oct 1, 1991The Upjohn CompanyApplicator having two cannulas
US5067944 *Feb 16, 1990Nov 26, 1991Jerry RoblesHypodermic needle guard
US5092854 *Oct 19, 1990Mar 3, 1992Johnson & Johnson Medical, Inc.Two-part flexible swivel spray tip for syringe
US6135984 *Jan 6, 1999Oct 24, 2000Dishler; Jon G.Cannula for use in corrective laser eye surgery
US6413245Oct 4, 2000Jul 2, 2002Alcon Universal Ltd.Sub-tenon drug delivery
US7108682 *Jan 24, 2003Sep 19, 2006Medtronic Vascular, Inc.Device for protecting a distal portion of a catheter system during shipment and storage
US7153316Nov 9, 2001Dec 26, 2006Mcdonald Marguerite BSurgical instruments and method for corneal reformation
US7285107 *Sep 26, 2003Oct 23, 2007Alcon, Inc.Vitreoretinal instrument
US8177747Nov 30, 2010May 15, 2012Alcon Research, Ltd.Method and apparatus for drug delivery
US8251980 *Mar 30, 2010Aug 28, 2012Alcon Research, Ltd.Viscous fluid extraction
US8372036May 5, 2010Feb 12, 2013Alcon Research, Ltd.Multi-layer heat assembly for a drug delivery device
US8579866Dec 29, 2008Nov 12, 2013Ucb Pharma, S.A.Systems and methods for administering medication
US8632511May 5, 2010Jan 21, 2014Alcon Research, Ltd.Multiple thermal sensors in a multiple processor environment for temperature control in a drug delivery device
US20110245787 *Mar 30, 2010Oct 6, 2011Zica Michael AViscous fluid extraction
EP0428378A2 *Nov 13, 1990May 22, 1991JOHNSON & JOHNSON MEDICAL, INC.Flexible spray tip for syringe
Classifications
U.S. Classification604/192, 604/275
International ClassificationA61M5/28, A61M5/32
Cooperative ClassificationA61M5/284, A61M2005/341, A61M5/3291, A61M5/3202, A61M5/329, A61M5/32
European ClassificationA61M5/32, A61M5/32B