Syringe which automatically make the hypodermic needle harmless

Details Syringe which automatically make the hypodermic needle harmless Syringe which automatically make the hypodermic needle harmless

1990-07-17

1992-01-28

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604198, A61M 500

Patent

active

050840290

DESCRIPTION:

BRIEF SUMMARY
This invention concerns a mechanism incorporated with a piston for syringes, which automatically renders the hypodermic needle harmless after use, said mechanism neutralizes the danger and automatically makes the hypodermic syringes equipped with such non-reusable.
The syringes currently on the market improperly defined as monouse have but one single weak protection against accidental injury and may be used, in spite of the written warning "use only once" as many times as desired.
The cap even if inserted is not sufficient protection, since any accidental cause whatsoever may cause it to come off leaving the needle exposed and able to injure and even the act of putting it on may itself constitute a potential danger and risk of injury.
Some inventions are known which act on the whole syringe and depend upon the user and would be designed in such a way as to protect the needle in a definitive way.
There is one type which, after use, retracts the needle inside the canal by means of the piston, with a maneuver carried out by the operator. This is laborious and in any case, it is not automatic. The needle remains floating inside the canal and cannot injure anyone, as long as no one removes the piston from the cylinder causing it to emerge. There are types involving complicated operations which make the needle disappear and remain enclosed, however always acting or involving and modifying the whole structure of the syringe.
These systems involve a total revolutionizing and complete restructuring of machinery from the industrial point of view, and from the point of view of the user, complicated use and dubious safety.
The essential aim of this invention is, while leaving unchanged the form and use of the traditional syringe, to give to the industry a syringe with only the slightest of added costs and to give to the user the possibility to be able to perform injections as he always has done, with the certainty that his syringe may not accidentally puncture himself or others after use, or that someone else may use it again in any way.
This object is achieved with this invention regarding a syringe formed by a cylindrical body, a piston slidable in said body, a perforated needle, characterized in that said needle is provided with a female hook and in said piston is inserted coaxially a cylindrical container which contains a male hooking pawl with its support structure, operatively connected to a pull helicoidal spring, which is fixed to the same cylindrical container and which is operatively connectable to said female hook to draw back and incorporate said needle in said cylindrical container.
In a preferred embodiment, said syringe comprises a cylindrical container open on both sides, which is inserted coaxially in a housing obtained in the normal rod of said piston and which has a rim on its head capable of being housed in a groove of the cap of said piston, said perforated stiletto, or needle, having a female hook, which is slidably supported through a hermetic seal, in a base and which is connected by shearable means to said cylindrical body, a pull helicoid spring extended housed during phase of use inside said cylindrical container and secured at its bottom by a catch and at the other side attached to the support structure of a pawl, which is secured to said cylindrical container by means of at least one pin of shearable material, said pawl with its support structure being inserted, in the phase of use, between the terminal part of said cylindrical container and a canal obtained inside said cap, said canal being closed by a cover of easily perforable material. The condition of the automatic re-entry of the needle, by means of the pawl, is the last pressure activated pushing the piston against the cylindrical body to completely release the liquid through the same needle. Such operation, which permits that the perforated stiletto, or needle, is incorporated in the syringe, is less dangerous and simpler than that which is carried out by the hygienic agents and user communities, as they now insert the protective c

REFERENCES:
patent: 4747830 (1988-05-01), Gloyer et al.
patent: 4747831 (1988-05-01), Kulli
patent: 4838869 (1989-06-01), Allard
patent: 4874382 (1989-10-01), Lindemann et al.
patent: 4955870 (1990-09-01), Ridderheim et al.

Affiliated with

Also associated with

Rating

Syringe which automatically make the hypodermic needle harmless does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Syringe which automatically make the hypodermic needle harmless , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Syringe which automatically make the hypodermic needle harmless will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1858017