|Publication number||USRE38964 E1|
|Application number||US 09/452,122|
|Publication date||Jan 31, 2006|
|Filing date||Nov 30, 1999|
|Priority date||Jan 9, 1995|
|Also published as||CA2209171A1, CA2209171C, DE802812T1, DE69620739D1, DE69620739T2, EP0802812A1, EP0802812B1, US5616136, US5637101, US5693028, WO1996021484A1|
|Publication number||09452122, 452122, US RE38964 E1, US RE38964E1, US-E1-RE38964, USRE38964 E1, USRE38964E1|
|Inventors||Richard A. Shillington|
|Original Assignee||Becton Dickinson And Company|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (14), Referenced by (76), Classifications (21), Legal Events (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present application is a continuation-in-part of co-pending application Ser. No. 08/370,241, filed Jan. 9, 1995, now U.S. Pat. No. 5,616,136 and entitled “QUICK RELEASE NEEDLE REMOVAL APPARATUS”.
The present invention relates to needle removal devices for syringes and other needle holders and pertains particularly to an improved needle release apparatus for quick and easy one hand removal of needles from holders.
A huge volume of hypodermic needles are used daily in the medical and health care industry and must be disposed of safely. These used needles pose a major health problem to the medical personnel using them as well as others who may come into contact with them either innocently or deliberately. The safe and effective disposal of these hypodermic needles poses one of the greatest disposal problems for the medical and health care industry.
Hypodermic needles are widely used for both injection of medication and for withdrawing blood samples for diagnostic purposes. In many instances the needle is removed from the holder and disposed of separately from the holder. In some cases, particularly with certain blood drawing or collection devices, the holder may be reused. In these cases, it is essential that the needle be easily, quickly and safely removed and disposed of without risk to the user.
The typical hypodermic needle comprises an elongated thin cannula having a sharp tip on one end and a hub at or near the other end for detachable attachment to a tubular holder such as a syringe or collector. The hub may have a threaded screw connector, Luer lock, or other type connector. The needle is usually covered with a protective tube or sheath detachably coupled to the hub for hand manipulation to aid in connecting the needle to the holder. The protective sheath is removed after the needle is mounted in the holder and when it is to be used. The sheath may be again used to protectively cover the needle after use. However, attempts to reinsert the needle into the sheath often result in pricks of the skin of the user. Therefore, direct disposal into a sharps container following use is desirable.
The present common techniques of drawing blood samples is by means of an evacuated tube and holder combination such as that sold under the trademark VACUTAINER by the Becton Dickinson Company. These blood collection assemblies comprise a tubular holder or barrel having an open end to receive an evacuated collection tube and a double needle in the other end. The needle is threadably mounted in one end of the tubular holder with an exterior needle for penetrating the patient tissue for receiving blood. The interior needle is covered with a sheath valve and penetrates an elastomeric stopper in one end of an evacuated vacuum tube which acts to draw the blood.
Many devices have been proposed in the past for removal and disposal of the needles. Examples of these are disclosed in the following U.S. patents:
These prior art devices are generally effective to remove the needles. However, they all have various drawbacks. For example, many of them cannot be effectively used with one hand and require the use of both hands. This is usually difficult or inconvenient for the user.
In the above identified parent application, we disclose a needle holder apparatus having means for releasing the needle from the holder when it is inserted into a special opening in a container and pressed forward. That holder required a special opening in the container for engagement with the forward end of the holder.
It is desirable that a simple, safe and effective quick release needle holder for hypodermic needles be available that can be used with one hand without special tools or containers.
It is the primary object of the present invention to provide a simple and effective quick one hand release needle holder for hypodermic needles.
In accordance with a primary aspect of the present invention, a quick release needle holder for hypodermic needles, comprises a tubular barrel having a needle hub receiving socket on one end, said needle receiving socket having a segmented wall defining a plurality of inwardly directed annular jaws for receiving and gripping a needle hub, means for normally biasing said jaws inwardly to an innermost position for gripping and mounting a needle hub, and finger operable means for releasably biasing said jaws to a needle hub releasing position.
The above and other objects and advantages of the present invention will become apparent from the following description when read in conjunction with the accompanying drawings wherein:
As best illustrated in
The jaws 30-36 extend coaxially and are annularly spaced about the central longitudinally axis of the barrel 12. The jaws or segments of the hub are further mounted to pivot inwardly and outwardly toward and away from the central axis for gripping and releasing a threaded hub of a needle, respectively. The barrel 12 is preferably fabricated from a polycarbonate compound and has some spring characteristics to enable the hub segments to be biased outward to release a needle hub 72. The hub segments are formed to be normally biased to the innermost position to threadably receive a needle hub 72. Each segment is also formed with an outer protrusion 48 forming an undercut or retainer shoulder 50.
The longitudinally slidable releasing sleeve 18 is formed with a forward wall 52 having an aperture 54 with an annular shoulder 56 for engaging retainer shoulders 50 behind protrusions 48 (FIG. 2). This retains the sleeve 18 in place on the neck of the needle mounting socket 26. The aperture 54 is formed by an annular wall or shoulder that engages the outer surface of the jaws and normally biases them inward to an innermost position. Also formed in the aperture 54 of the forward end wall 52 are a plurality of inwardly projecting wedges 58, 60, 62, and 64 (
The connector assembly is designed to threadably receive or grip the threaded hub 72 of a needle 24 of the type as shown in FIG. 4. The sleeve 18 is normally biased to the forwardmost position by means of a silicone collar or spring 66 so that the jaws can threadably receive the hub of the needle. The sleeve may be biased to the rearmost position by engaging the finger flanges 20 and 22 with the fore-finger and second finger and engaging the rear of tube 12 with the thumb, pressing the fingers and thumb toward one another slides the sleeve 18 along tube 12 camming the jaws open and releasing the hub of the needle.
The needle is mounted in the retainer and connector assembly of the tube 12 by threadably extending the needle hub assembly into the socket 26. The needle flange 70 engages the outer ends of the jaws and stops or positions the threaded portion 72. The forward bias of the sleeve by the spring force of the collar 66 forces or maintains the jaws to their inner or inward gripping position for gripping or threadably receiving the hub of the needle assembly. This positions the inner needle inside the tube 12 to be engaged and to puncture a stopper of a vacuum blood collection tube.
When it is desired to remove the needle, the sleeve is simply moved backward on the tube 12 biasing the jaws open releasing the needle hub for its removal. This is accomplished by pressing forward on the back end of the sleeve while pulling backward on the finger tabs or flanges 20 and 22 on the sleeve while holding it over a container so that the needle is quickly released and falls directly into a disposable container.
While I have illustrated my invention by means of specific embodiments, it is to be understood that numerous changes and modifications may be made therein without departing from the spirit and scope of the invention, as defined in the appended claims.
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|U.S. Classification||604/240, 604/242, 604/187|
|International Classification||A61M5/00, A61M5/32, A61M5/34, A61B5/15|
|Cooperative Classification||A61M5/321, A61B5/1438, A61M2005/3206, A61M5/3205, A61M5/344, A61B5/150389, A61B5/154, A61B5/150496, A61B5/150732, A61B5/15003|
|European Classification||A61M5/32C, A61M5/32C2, A61M5/34C, A61B5/14B12|
|Jun 8, 2009||REMI||Maintenance fee reminder mailed|
|Nov 29, 2009||LAPS||Lapse for failure to pay maintenance fees|