WO2017081431A1 - Needle assemblies and methods of manufacture - Google Patents

Needle assemblies and methods of manufacture Download PDF

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Publication number
WO2017081431A1
WO2017081431A1 PCT/GB2016/000192 GB2016000192W WO2017081431A1 WO 2017081431 A1 WO2017081431 A1 WO 2017081431A1 GB 2016000192 W GB2016000192 W GB 2016000192W WO 2017081431 A1 WO2017081431 A1 WO 2017081431A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
needle
needle assembly
receptacle
boss
Prior art date
Application number
PCT/GB2016/000192
Other languages
French (fr)
Inventor
Timothy Bateman
Andrew Bernard DAVEY
Richard Hingley
Neil Steven Veasey
Original Assignee
Smiths Medical International Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Smiths Medical International Limited filed Critical Smiths Medical International Limited
Publication of WO2017081431A1 publication Critical patent/WO2017081431A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/343—Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub

Definitions

  • This invention relates to needle assemblies of the kind including a hollow metal needle shaft and a hub assembly attached with the shaft, the hub assembly including a coupling by which fluid connection can be made to the needle assembly.
  • medico-surgical needles comprise a metal shaft with a bevelled cutting tip at one end and a hub at the opposite end by which connection is made to the bore of the needle.
  • the hub has some form of coupling, such as a female tapered bore into which a male coupling can be inserted.
  • the coupling could take the form of a male connection adapted to be inserted into a mating female connection such as at the end of tubing.
  • needle assemblies are described in, for example, EP109657, US2989053, US5149328, US4795445, US8672892, US6673440, EP356774, US5342309, US3720210, US2740192, US7736337, US2012179113, GB894653, US3093134, US6024727 and GB1151222.
  • a needle assembly of the above-specified kind characterised in that the hub assembly includes a first part of a plastics material moulded about the shaft and a second part preformed of a plastics material providing the coupling and a receptacle into which the first part is inserted and secured.
  • the first part is preferably secured in the receptacle by bonding.
  • the first part and the receptacle may be formed with cooperating surface formations to define an angular orientation between the first and second parts.
  • the cooperating surface formations preferably include a projecting key on one part and a cooperating keyway on the other part.
  • the needle shaft may have a bevel at its patient end and the second part may include an externally- visible marking to indicate the orientation of the bevelled end of the needle shaft.
  • the coupling may be a female tapered recess adapted to receive a mating male coupling.
  • the needle assembly may be an oocyte recovery needle assembly.
  • a method of manufacturing a needle assembly including the steps of providing a hollow, metal needle shaft, moulding onto the shaft towards its machine end a first part of a plastics material, providing a preformed second part including a coupling at one end by which connection can be made to the needle assembly and at its opposite end a receptacle adapted to receive the first part, inserting the needle shaft and first part into the receptacle and securing the first part in the receptacle so as thereby to provide a hub at the machine end of the needle shaft.
  • the first part may be secured in the receptacle by bonding.
  • the first part may be moulded with a surface formation to define the orientation of a bevel at the patient end of the shaft.
  • the method may include the step of forming a bevel at the patient end of the shaft after moulding the first part and using the surface formation on the first part to orientate the shaft while forming the bevel.
  • needle assembly made by a method according to the above other aspect of the present invention.
  • Figure 1 is a cross sectional side elevation view of the assembly
  • Figure 2 shows a needle shaft at a preliminary step in manufacture
  • Figures 3 and 4 show subsequent steps in manufacture
  • Figure 5 is a perspective view showing a final step in manufacture
  • Figure 6 is a perspective view of a modified form of a part of a needle assembly.
  • the oocyte needle assembly comprises a hollow, metal shaft 10 and a plastics hub assembly 20 securely attached to the machine end 11 of the shaft.
  • the needle shaft 10 is formed with a bevelled cutting tip 12 at its forward, patient end 13.
  • the hub 20 is formed in two parts namely a first part or boss 21 of a plastics material moulded onto the needle shaft 10 a short distance from the machine end 11 and a second part or sleeve 22 premoulded of a plastics material in which the first part 21 is securely attached.
  • the boss 21 is shown most clearly in Figure 5 and has a forward, patient end portion 23 of cylindrical shape and a central portion 24 of circular section and with a larger diameter than the forward portion.
  • the boss 21 also has a rear portion 25 of about the same diameter as the forward portion 23 and of circular section apart from a surface formation in the form of a projecting rib or key 26 extending longitudinally externally along the rear portion.
  • the boss 21 is spaced from the rear end 11 of the shaft 10 by a distance approximately equal to the length of the boss.
  • the sleeve 22 has a larger bulk than the boss 21 and has a generally cylindrical shape with a waisted outer surface 30 to enable the hub 20 to be gripped firmly between finger and thumb.
  • the sleeve 22 provides a female coupling formed by a recess 31 of circular section that tapers along its length from a larger diameter at the rear end to a slightly smaller diameter at the forward end of the recess.
  • the recess 31 is shaped to receive a tapered male coupling (not shown) such as the nose of a syringe, in a sealing mating engagement.
  • the forward end of the recess 31 communicates with an axially-aligned passage 32 extending along the forward half of the sleeve 22.
  • the passage 32 is divided into three parts.
  • the rear part 33 opens into the coupling recess 31 and has a diameter equal to the outer diameter of the needle shaft 10.
  • the central section 34 has a larger diameter than the rear part 33 and is of circular section apart from a longitudinally-extending channel or keyway 35.
  • the central section 34 and the forward section 36 together provide a receptacle for the rear and central portions 25 and 24 of the boss 21 on the needle shaft. More particularly, the shape and size of the central section 34 is arranged to receive the rear portion 25 of the boss 21, with the key 26 on the boss being received in the keyway 35 in the central section.
  • the forward, patient end section 36 of the passage 32 is circular and larger in diameter than the central section 34.
  • the patient end 36 section opens on the forward, patient end face 37 of the sleeve 22 and is the same size as the central portion 24 of the boss 21 received in the patient end section.
  • the boss 21 is secured into the sleeve 22 by means of an adhesive or solvent applied to the outside of the boss and the outside of that part 11 of the needle shaft 10 rearwardly of the boss, with the forward facing surface 38 of the central portion 24 lying level with the forward face 37 of the sleeve 22.
  • the hub 20 has some form of marking visible on its external surface to indicate the orientation of the bevel 12 at the patient end 13 of the needle shaft 10 so that the user can identify the orientation when the patient end tip is inserted in patient tissue.
  • this marking takes the form of a printed mark 50 in line with the keyway 35 in the passage 32 and hence in line with the key 26 on the boss 21 and the axis of the bevel 12.
  • the marking could be provided by a surface formation on the hub 20, such as a groove or a raised marking.
  • the needle assembly is made by first providing a hollow metal needle shaft 10 cut square at both ends, as shown in Figure 2.
  • the shaft 10 may be treated such as by
  • One end of the shaft 10 is then inserted in a mould tool 60 so that the end 11 of the shaft projects a short distance beyond the tool, as shown in Figure 3.
  • a molten thermoplastic is then injected through an inlet 61 to fill a cavity 62 around the shaft 10 that defines the external shape of the boss 21.
  • the boss 21 has a relatively low bulk and wall thickness, making it less likely to deform or shrink after removal from the mould tool.
  • the shaft 10 After the shaft 10 has been removed from the tool 60 with the boss 21 in place it is mounted in a grinding machine 70 so that its patient end 13 is located adjacent a grinding tool 71, as shown in Figure 4.
  • the key formation 26 on the boss 21 is used to retain the shaft 10 in the machine 70 in the appropriate orientation so that the grinding tool 71 grinds the tip 13 of the shaft 10 to form a bevel 12 aligned with the key.
  • the bevel 12 could be formed before moulding the boss 21.
  • the next step is to apply a suitable bonding solution such as an adhesive, cement, solvent or the like to the outside of the rear part of the boss 21 and to the outside of the rear part 11 of the shaft 10 where it projects from the rear end of the boss.
  • a suitable bonding solution such as an adhesive, cement, solvent or the like
  • the key 26 on the boss 21 is aligned with the keyway 35 in the sleeve 22, the rear end 11 of the shaft 10 and the boss being pushed 22 into the passage 32 at the rear end of the sleeve.
  • the bonding solution After the bonding solution has cured the needle shaft 10 will be securely attached with the sleeve to provide a finished hub 20.
  • Needle assemblies according to the present invention can have various advantages. Connection to the outside of the shaft is made by the boss, which is a relatively small, low bulk item and is, therefore, less susceptible to shrinkage and deformation during moulding. There is, therefore, less risk that it will shrink away from the shaft and form a poor connection. It is also easier to inspect the joint of the boss with the shaft and detect any preassemblies that may not be secure before they are assembled into the sleeve to complete the hub.
  • the material of the boss and of the hub sleeve could be the same or could be different.
  • the boss need not come into contact with any materials flowing along the bore of the shaft so could be of a material that provides the best bond with the needle shaft even if it is not biocompatible with the material supplied along the needle shaft.
  • the sleeve of the hub can be made of a different material less suitable for bonding to the metal shaft but that does have suitable biocompatibility.
  • the fit of the boss in the hub sleeve could be chosen to be a tight fit so that the sleeve applies a compressive inwardly-directed force around the boss. This would help keep the boss in close contact with the outside of the needle shaft and resist any shrinkage.
  • This effect can be enhance by the arrangement shown in Figure 6.
  • the sleeve (not shown) is modified by the inclusion of an internal ramp portion positioned to engage the outside of the chuck section 225.
  • the fingers 226 make the rear portion 125 more flexible in the region of the chuck section 225 so that, when the needle and boss assembly 100, 121 is pushed into the passage through the sleeve the ramp engages the outside of the fingers and pushes them radially inwardly against the outside of the needle shaft to improve retention with the shaft.
  • the invention is not confined to use in oocyte recovery needle assemblies but could be used in other medico-surgical needle assemblies.
  • the needle assemblies could be made in other ways than the method described above.

Abstract

An oocyte needle assembly has a metal needle shaft (10) and small boss (21) of plastics material moulded onto the shaft. The rear end of the needle shaft and the boss are inserted into a receptacle (34, 36) at one end of an outer sleeve (22) and bonded in place. The other end of the outer sleeve (22) has a tapered female coupling recess (31) into which the nose of a syringe can be inserted to make fluid connection with the needle. The boss has a key (26) that extends in a keyway (35) in the receptacle (34, 36). The key (26) on the boss is also used to orient the needle shaft (10) while a bevel (12) is formed at the patient end (13).

Description

NEEDLE ASSEMBLIES AND METHODS OF MANUFACTURE
This invention relates to needle assemblies of the kind including a hollow metal needle shaft and a hub assembly attached with the shaft, the hub assembly including a coupling by which fluid connection can be made to the needle assembly.
There are many different types of needles used in medical and surgical applications. Usually, medico-surgical needles comprise a metal shaft with a bevelled cutting tip at one end and a hub at the opposite end by which connection is made to the bore of the needle. The hub has some form of coupling, such as a female tapered bore into which a male coupling can be inserted. Alternatively, the coupling could take the form of a male connection adapted to be inserted into a mating female connection such as at the end of tubing. Examples of needle assemblies are described in, for example, EP109657, US2989053, US5149328, US4795445, US8672892, US6673440, EP356774, US5342309, US3720210, US2740192, US7736337, US2012179113, GB894653, US3093134, US6024727 and GB1151222.
Although it is possible for a plastics hub to be moulded onto the shaft of a metal needle there can be problems with the plastics shrinking or deforming and leading to a poor connection of the hub on the needle shaft. Reliable assembly and quality checks can be difficult. Also, the material of the hub needs to be compatible with the fluid or other material supplied through the needle but this material may not be suitable for forming a secure connection with the needle shaft.
It is an object of the present invention to provide an alternative needle assembly and method of manufacture.
According to one aspect of the present invention there is provided a needle assembly of the above-specified kind, characterised in that the hub assembly includes a first part of a plastics material moulded about the shaft and a second part preformed of a plastics material providing the coupling and a receptacle into which the first part is inserted and secured.
The first part is preferably secured in the receptacle by bonding. The first part and the receptacle may be formed with cooperating surface formations to define an angular orientation between the first and second parts. The cooperating surface formations preferably include a projecting key on one part and a cooperating keyway on the other part. The needle shaft may have a bevel at its patient end and the second part may include an externally- visible marking to indicate the orientation of the bevelled end of the needle shaft. The coupling may be a female tapered recess adapted to receive a mating male coupling. The needle assembly may be an oocyte recovery needle assembly.
According to another aspect of the present invention there is provided a method of manufacturing a needle assembly including the steps of providing a hollow, metal needle shaft, moulding onto the shaft towards its machine end a first part of a plastics material, providing a preformed second part including a coupling at one end by which connection can be made to the needle assembly and at its opposite end a receptacle adapted to receive the first part, inserting the needle shaft and first part into the receptacle and securing the first part in the receptacle so as thereby to provide a hub at the machine end of the needle shaft.
The first part may be secured in the receptacle by bonding. The first part may be moulded with a surface formation to define the orientation of a bevel at the patient end of the shaft. The method may include the step of forming a bevel at the patient end of the shaft after moulding the first part and using the surface formation on the first part to orientate the shaft while forming the bevel.
According to a further aspect of the present invention there is provided needle assembly made by a method according to the above other aspect of the present invention.
An oocyte recovery needle assembly and its method of manufacture according to the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a cross sectional side elevation view of the assembly;
Figure 2 shows a needle shaft at a preliminary step in manufacture; Figures 3 and 4 show subsequent steps in manufacture;
Figure 5 is a perspective view showing a final step in manufacture; and
Figure 6 is a perspective view of a modified form of a part of a needle assembly.
With reference first to Figures 1 and 5 the oocyte needle assembly comprises a hollow, metal shaft 10 and a plastics hub assembly 20 securely attached to the machine end 11 of the shaft. The needle shaft 10 is formed with a bevelled cutting tip 12 at its forward, patient end 13. The hub 20 is formed in two parts namely a first part or boss 21 of a plastics material moulded onto the needle shaft 10 a short distance from the machine end 11 and a second part or sleeve 22 premoulded of a plastics material in which the first part 21 is securely attached.
The boss 21 is shown most clearly in Figure 5 and has a forward, patient end portion 23 of cylindrical shape and a central portion 24 of circular section and with a larger diameter than the forward portion. The boss 21 also has a rear portion 25 of about the same diameter as the forward portion 23 and of circular section apart from a surface formation in the form of a projecting rib or key 26 extending longitudinally externally along the rear portion. The boss 21 is spaced from the rear end 11 of the shaft 10 by a distance approximately equal to the length of the boss.
The sleeve 22 has a larger bulk than the boss 21 and has a generally cylindrical shape with a waisted outer surface 30 to enable the hub 20 to be gripped firmly between finger and thumb. Internally, the sleeve 22 provides a female coupling formed by a recess 31 of circular section that tapers along its length from a larger diameter at the rear end to a slightly smaller diameter at the forward end of the recess. The recess 31 is shaped to receive a tapered male coupling (not shown) such as the nose of a syringe, in a sealing mating engagement. The forward end of the recess 31 communicates with an axially-aligned passage 32 extending along the forward half of the sleeve 22. The passage 32 is divided into three parts. The rear part 33 opens into the coupling recess 31 and has a diameter equal to the outer diameter of the needle shaft 10. The central section 34 has a larger diameter than the rear part 33 and is of circular section apart from a longitudinally-extending channel or keyway 35. The central section 34 and the forward section 36 together provide a receptacle for the rear and central portions 25 and 24 of the boss 21 on the needle shaft. More particularly, the shape and size of the central section 34 is arranged to receive the rear portion 25 of the boss 21, with the key 26 on the boss being received in the keyway 35 in the central section. The forward, patient end section 36 of the passage 32 is circular and larger in diameter than the central section 34. More particularly, the patient end 36 section opens on the forward, patient end face 37 of the sleeve 22 and is the same size as the central portion 24 of the boss 21 received in the patient end section. The boss 21 is secured into the sleeve 22 by means of an adhesive or solvent applied to the outside of the boss and the outside of that part 11 of the needle shaft 10 rearwardly of the boss, with the forward facing surface 38 of the central portion 24 lying level with the forward face 37 of the sleeve 22.
The hub 20 has some form of marking visible on its external surface to indicate the orientation of the bevel 12 at the patient end 13 of the needle shaft 10 so that the user can identify the orientation when the patient end tip is inserted in patient tissue. As shown in Figure 5 this marking takes the form of a printed mark 50 in line with the keyway 35 in the passage 32 and hence in line with the key 26 on the boss 21 and the axis of the bevel 12. Alternatively, the marking could be provided by a surface formation on the hub 20, such as a groove or a raised marking.
The needle assembly is made by first providing a hollow metal needle shaft 10 cut square at both ends, as shown in Figure 2. The shaft 10 may be treated such as by
roughening or grooving towards its patient end 13 to enhance its echogenic properties. It may also be similarly treated in the region where the boss 21 is to be moulded so as to improve the grip of the boss on the shaft 10.
One end of the shaft 10 is then inserted in a mould tool 60 so that the end 11 of the shaft projects a short distance beyond the tool, as shown in Figure 3. A molten thermoplastic is then injected through an inlet 61 to fill a cavity 62 around the shaft 10 that defines the external shape of the boss 21. The boss 21 has a relatively low bulk and wall thickness, making it less likely to deform or shrink after removal from the mould tool.
After the shaft 10 has been removed from the tool 60 with the boss 21 in place it is mounted in a grinding machine 70 so that its patient end 13 is located adjacent a grinding tool 71, as shown in Figure 4. The key formation 26 on the boss 21 is used to retain the shaft 10 in the machine 70 in the appropriate orientation so that the grinding tool 71 grinds the tip 13 of the shaft 10 to form a bevel 12 aligned with the key. Alternatively, the bevel 12 could be formed before moulding the boss 21.
The next step is to apply a suitable bonding solution such as an adhesive, cement, solvent or the like to the outside of the rear part of the boss 21 and to the outside of the rear part 11 of the shaft 10 where it projects from the rear end of the boss. As shown in Figure 5, the key 26 on the boss 21 is aligned with the keyway 35 in the sleeve 22, the rear end 11 of the shaft 10 and the boss being pushed 22 into the passage 32 at the rear end of the sleeve. After the bonding solution has cured the needle shaft 10 will be securely attached with the sleeve to provide a finished hub 20.
Needle assemblies according to the present invention can have various advantages. Connection to the outside of the shaft is made by the boss, which is a relatively small, low bulk item and is, therefore, less susceptible to shrinkage and deformation during moulding. There is, therefore, less risk that it will shrink away from the shaft and form a poor connection. It is also easier to inspect the joint of the boss with the shaft and detect any preassemblies that may not be secure before they are assembled into the sleeve to complete the hub. The material of the boss and of the hub sleeve could be the same or could be different. The boss need not come into contact with any materials flowing along the bore of the shaft so could be of a material that provides the best bond with the needle shaft even if it is not biocompatible with the material supplied along the needle shaft. The sleeve of the hub can be made of a different material less suitable for bonding to the metal shaft but that does have suitable biocompatibility. The fit of the boss in the hub sleeve could be chosen to be a tight fit so that the sleeve applies a compressive inwardly-directed force around the boss. This would help keep the boss in close contact with the outside of the needle shaft and resist any shrinkage. This effect can be enhance by the arrangement shown in Figure 6. This shows a modified form of the boss 121 where the rear portion 125 is extended beyond the key 126 to provide a chuck section 225 divided into a number of parallel fingers 226 separated from one another by slots 227 through the thickness of the chuck section. The sleeve (not shown) is modified by the inclusion of an internal ramp portion positioned to engage the outside of the chuck section 225. The fingers 226 make the rear portion 125 more flexible in the region of the chuck section 225 so that, when the needle and boss assembly 100, 121 is pushed into the passage through the sleeve the ramp engages the outside of the fingers and pushes them radially inwardly against the outside of the needle shaft to improve retention with the shaft.
The invention is not confined to use in oocyte recovery needle assemblies but could be used in other medico-surgical needle assemblies. The needle assemblies could be made in other ways than the method described above.

Claims

1. A needle assembly including a hollow metal needle shaft (10) and a hub assembly (20) attached with the shaft, the hub assembly including a coupling (31) by which fluid connection can be made to the needle assembly, characterised in that the hub assembly (20) includes a first part (21) of a plastics material moulded about the shaft (10) and a second part (22) preformed of a plastics material providing the coupling (31) and a receptacle (34, 36) into which the first part (21) is inserted and secured.
2. A needle assembly according to Claim 1 , characterised in that the first part (21 ) is secured in the receptacle (34, 36) by bonding.
3. A needle assembly according to Claim 1 or 2, characterised in that the first part (21) and the receptacle (34, 36) are formed with cooperating surface formations (26 and 35) to define an angular orientation between the first and second parts (21 and 22).
4. A needle assembly according to Claim 3, characterised in that the cooperating
surface formations include a projecting key (26) on one part (21) and a cooperating keyway (35) on the other part (22).
5. A needle assembly according to any one of the preceding claims, characterised in that the needle shaft (10) has a bevel (12) at its patient end (13) and the second part (22) includes an externally-visible marking (50) to indicate the orientation of the bevelled end (12) of the needle shaft (10).
6. A needle assembly according to any one of the preceding claims, characterised in that the coupling is a female tapered recess (31) adapted to receive a mating male coupling.
7. A needle assembly according to any one of the preceding claims, characterised in that the needle assembly is an oocyte recovery needle assembly.
8. A method of manufacturing a needle assembly including the steps of providing a hollow, metal needle shaft (10), moulding onto the shaft towards its machine end a first part (21) of a plastics material, providing a preformed second part (22) including a coupling (31) at one end by which connection can be made to the needle assembly and at its opposite end a receptacle (34, 36) adapted to receive the first part (21), inserting the needle shaft (10) and first part (21) into the receptacle (34, 36) and securing the first part (21) in the receptacle so as thereby to provide a hub (20) at the machine end of the needle shaft (10).
9. A method according to Claim 8, characterised in that the first part (21) is secured in the receptacle (34, 36) by bonding.
10. A method according to Claim 8 or 9, characterised in that the first part (21 ) is
moulded with a surface formation (26) to define the orientation of a bevel (12) at the patient end (13) of the shaft (10).
11. A method according to Claim 10, characterised in that the method includes the step of forming a bevel (12) at the patient end (13) of the shaft (10) after moulding the first part (21) and using the surface formation (26) on the first part to orientate the shaft (10) while forming the bevel.
12. A needle assembly made by a method according to any one of Claims 8 to 11.
PCT/GB2016/000192 2015-11-13 2016-10-20 Needle assemblies and methods of manufacture WO2017081431A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1520043.9 2015-11-13
GBGB1520043.9A GB201520043D0 (en) 2015-11-13 2015-11-13 Needle assemblies and methods of manufacture

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US2740192A (en) 1951-07-09 1956-04-03 Robert W Ogle Method for imbedding a hollow needle in plastic material
US2989053A (en) 1956-01-17 1961-06-20 Baxter Don Inc Hypodermic needle
GB894653A (en) 1958-10-13 1962-04-26 Cook Waite Lab Inc Needle assembly
US3093134A (en) 1959-01-19 1963-06-11 Brunswick Corp Needle with molded hub
GB1151222A (en) 1965-06-04 1969-05-07 Stanley Maurice Whitesmith Improvements in and relating to Hypodermic Syringes
DE1491743A1 (en) * 1966-07-13 1969-06-26 Georg A Henke Gmbh Injection needle and process for its manufacture
US3720210A (en) 1971-03-03 1973-03-13 Baxter Laboratories Inc Indwelling catheter device
US4266543A (en) * 1979-02-22 1981-05-12 Blum Alvin S Hypodermic needle protection means
EP0109657A1 (en) 1982-11-18 1984-05-30 Abbott Laboratories Improved catheter assembly
US4795445A (en) 1987-03-27 1989-01-03 Becton, Dickinson And Company Hub configuration
EP0356774A1 (en) 1988-08-31 1990-03-07 Edward Weck, Inc. Catheter
US5149328A (en) 1990-12-31 1992-09-22 Abbott Laboratories Intravenous needle assembly having interlocking wings
US5342309A (en) 1993-03-05 1994-08-30 Becton, Dickinson And Company Syringe having safety shield
US6024727A (en) 1995-01-10 2000-02-15 Thorne; Gale H. Self-retracting medical needle apparatus and methods
US6673440B2 (en) 2000-11-06 2004-01-06 Sterling Medivations, Inc. Subcutaneous injection set tubing with solvent bonding
WO2009150399A1 (en) * 2008-06-13 2009-12-17 Smiths Medical International Limited Needles
US7736337B2 (en) 2006-02-16 2010-06-15 Smiths Medical, Asd, Inc. Sealing catheter hub attachment
US20120179113A1 (en) 2009-09-30 2012-07-12 Terumo Kabushiki Kaisha Syringe needle assembly and medication syringe device
US20130138047A1 (en) * 2010-09-29 2013-05-30 Terumo Kabushiki Kaisha Syringe with needle
US8672892B2 (en) 2003-04-22 2014-03-18 Smiths Medical Asd, Inc. Tamper evident vacuum tube holder assembly and needle hub assembly therefor

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740192A (en) 1951-07-09 1956-04-03 Robert W Ogle Method for imbedding a hollow needle in plastic material
US2989053A (en) 1956-01-17 1961-06-20 Baxter Don Inc Hypodermic needle
GB894653A (en) 1958-10-13 1962-04-26 Cook Waite Lab Inc Needle assembly
US3093134A (en) 1959-01-19 1963-06-11 Brunswick Corp Needle with molded hub
GB1151222A (en) 1965-06-04 1969-05-07 Stanley Maurice Whitesmith Improvements in and relating to Hypodermic Syringes
DE1491743A1 (en) * 1966-07-13 1969-06-26 Georg A Henke Gmbh Injection needle and process for its manufacture
US3720210A (en) 1971-03-03 1973-03-13 Baxter Laboratories Inc Indwelling catheter device
US4266543A (en) * 1979-02-22 1981-05-12 Blum Alvin S Hypodermic needle protection means
EP0109657A1 (en) 1982-11-18 1984-05-30 Abbott Laboratories Improved catheter assembly
US4795445A (en) 1987-03-27 1989-01-03 Becton, Dickinson And Company Hub configuration
EP0356774A1 (en) 1988-08-31 1990-03-07 Edward Weck, Inc. Catheter
US5149328A (en) 1990-12-31 1992-09-22 Abbott Laboratories Intravenous needle assembly having interlocking wings
US5342309A (en) 1993-03-05 1994-08-30 Becton, Dickinson And Company Syringe having safety shield
US6024727A (en) 1995-01-10 2000-02-15 Thorne; Gale H. Self-retracting medical needle apparatus and methods
US6673440B2 (en) 2000-11-06 2004-01-06 Sterling Medivations, Inc. Subcutaneous injection set tubing with solvent bonding
US8672892B2 (en) 2003-04-22 2014-03-18 Smiths Medical Asd, Inc. Tamper evident vacuum tube holder assembly and needle hub assembly therefor
US7736337B2 (en) 2006-02-16 2010-06-15 Smiths Medical, Asd, Inc. Sealing catheter hub attachment
WO2009150399A1 (en) * 2008-06-13 2009-12-17 Smiths Medical International Limited Needles
US20120179113A1 (en) 2009-09-30 2012-07-12 Terumo Kabushiki Kaisha Syringe needle assembly and medication syringe device
US20130138047A1 (en) * 2010-09-29 2013-05-30 Terumo Kabushiki Kaisha Syringe with needle

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