A retractable needle safety syringe manufacturer s is provided having a braking mechanism. The braking mechanism may be disposed at a proximal portion of a syringe manufacturers body of the syringe manufacturers. The braking mechanism may comprise a brake member which is traversable between a braking position and a released position. At the braking position, the brake member frictionally engages an outer surface of the shaft of a plunger of the syringe manufacturers. The frictional engagement counterbalances a retraction force that urges a piston of the syringe manufacturers toward a retracted position. When the brake member is traversed to the released position, the brake member does not press against the outer surface of the shaft. As such, the retraction force may traverse the piston toward the retracted position and traverse a needle and needle holder into the body of the syringe manufacturers.

1. A retractable safetysyringe manufacturersfor preventing accidental needle pricking and needle reuse, the syringe manufacturers comprising: a syringe manufacturers body defining a proximal portion and a distal portion; a needle removably engageable to the body distal portion; a piston disposed within the body and biasable to the body proximal portion via a biasing force when the piston is traversed toward the body distal portion, the piston being traversable between an engaged position and a retracted position; a shaft disposed within the body and extending through the proximal portion of the body, traversal of the shaft through the body operative to traverse the piston between the engaged and retracted positions; a brake member comprising at least two lobes and at least two bases, the bases and lobes being attached to each other, the lobes contacting only the shaft and the bases only contacting the syringe manufacturers body; wherein the bases deflect the lobes inward and against the shaft when the brake member is in a braking position, the lobes being normally biased outward so as to be sufficiently disconnected from the shaft to allow the biasing force to retract the piston when the brake member is in a released position.

2. The syringe manufacturers of claim 1 wherein the brake member has three lobes and three bases.

3. The syringe manufacturers of claim 1 wherein the brake member has six lobes and five bases.

4. The syringe manufacturers of claim 1 wherein the brake member comprises a first half and a second half pivotable with respect to each other about a living hinge, the first and second halves collectively forming the lobes and bases.

5. Thesyringe manufacturersof claim 4 wherein the first half has a post and the second half has a hole sized and configured to receive the post.

6. The syringe manufacturers of claim 1 wherein the lobes have a concave configuration sized and configured to an outer periphery of the shaft.

7. A retractable safety syringe manufacturers for preventing accidental needle pricking and reuse, the syringe manufacturers comprising: a syringe manufacturers body defining a proximal portion and a distal portion; a needle removably engageable to the body distal portion; a piston disposed within the body and biasable to the body proximal portion via a biasing force when the piston is traversed toward the body distal portion, the piston being traversable between an engaged position and a retracted position; a shaft disposed within the body and extending through the proximal portion of the body, traverse of the shaft through the body operative to traverse the piston between the engaged and retracted positions; a brake member traversable between a braking position and a released position, an inner periphery of the brake member having a concave configuration sized and configured so as to contact an outer surface of the shaft when the brake member is in the braking position for providing a force substantially equal to the biasing force when the brake member is at the braking position, the brake member being normally biased such that the inner periphery of the brake member does not engage the shaft so as to allow the piston to be retracted under the biasing force when the brake member is in the released position.

8. The syringe manufacturers of claim 7 wherein the first and second halves are fabricated from a unitary material.

9. The syringe manufacturers of claim 7 wherein the first and second halves are attached to each other via a living hinge.

10. Thesyringe manufacturersof claim 7 wherein the first and second halves collectively form a groove about an outer periphery of the brake member.

11. The syringe manufacturers of claim 10 further comprising an o ring disposed within the groove.

12. The syringe manufacturers of claim 7 wherein the first and second halves collectively form a groove about an inner periphery thereof.

13. The syringe manufacturers of claim 12 further comprising an o ring disposed within the groove.

14. The syringe manufacturers of claim 13 wherein the o ring displaces the first and second halves of the brake member away from the shaft when the brake member is in the released position such that the biasing force traverses the piston toward the retracted position.
Hypodermic needles are used on a regular basis by medical professionals such as doctors, nurses and other medicine related fields. The typical hypodermic needle has a syringe manufacturers body with a hollow interior cavity. A piston is slideably disposed within the syringe manufacturers body and may be traversed between a proximal position and a distal position. A shaft may be fixedly attached to the piston and extend through a proximal portion of the syringe manufacturers body. A thumb platform may be attached to the proximal portion of the shaft. The thumb platform may be traversed toward or away from the proximal portion of the syringe manufacturers body to traverse the piston toward the distal position or the proximal position, respectively. The distal portion of the syringe manufacturers body may have a needle attached thereto. Thesyringe manufacturersbody piston and the distal portion of the syringe manufacturers body define a variable fluid chamber. The variable fluid chamber may be filled with fluidic medication to be injected into a patient. In the typical hypodermic needle, the needle is fixedly engaged to the distal portion of the syringe manufacturers body. Also, the piston may be positioned anywhere between the proximal position and the distal position. The user may release the thumb platform and the piston will remain at such position because there is no biasing force urging the piston back toward the retracted position.

In use, the hypodermic needle may be provided to the medical professional without fluidic medication filled within the variable fluid chamber. The user may traverse the piston toward the distal position. The needle of the hypodermic needle may be inserted into a fluidic medication container. The user may retract the piston toward the proximal position thereby transferring fluidic medication from the container into the variable fluid chamber. The user may release the thumb platform and the piston is not traversed to the proximal position because there is no biasing force which urges the piston back toward the proximal position.

The medical professional may remove trapped air within the variable fluid chamber by inverting the syringe manufacturers such that the needle is pointing upwardly, tapping the outside of the syringe manufacturers body to urge the air bubbles toward the needle, and depressing the thumb platform slightly to eject the air bubbles from the variable fluid chamber. The medical professional may release the thumb platform, and the piston is not retracted back toward the proximal position. The medical professional may insert the needle into a skin of the patient and inject the fluidic medication into the patient by traversing the piston toward the distal position. Once the piston is at the distal position, the fluidic medication is injected into the patient and the medical professional removes the needle from the patient. At this point, the needle contaminated and exposed and is a health-risk to the medical professional or other people who may handle the syringe manufacturers. Also, drug addicts may reuse the needle.

The risks associated with the spread of blood-borne pathogens through use of prior art hypodermic needles are significant and well documented. In recent years, the public has become increasingly aware of the health hazards associated with needle reuse and accidental needle prickings. These risks are most prevalent among certain groups of people, such as drug addicts, drug users (e.g., diabetics), medical personnel and healthcare providers. In fact, more than twenty blood-borne pathogens can be transmitted by the reuse of needles or accidental needle prickings, just a few of which include human immunodeficiency virus (HIV), acquired immunodeficiency syndrome (AIDS), hepatitis B, hepatitis C, syphilis, malaria, tuberculosis, and herpes.