Syringe needle abstract
Auto-non-reusable syringe-needle system for injections, for a single
use, composed of a barrel (1) to contain the liquid to be injected,
a piston (2) impelled by a plunger (3) to make it slide through
the inside of the barrel (1), an internal rib or emergence (5) in
the form of a ring and which emerges from the syringe-needle body
between the front side of the completely introduced piston (2) and
the tip of the canula (4) opposite to the bevel, which forms two
fixed seats (6 and 7) on both of the valve for a moving body (8)
located in the interior and coaxially movable and which has an elastic
flexible circular emergence (9) which can act on the two seats (6
and 7) and which can go from a position whereby it allows movement
in the direction of suction of the liquid, to a direction of injection,
said moving body (8) having emergences (10) which serve as guides
and which have channels (10) for the passage of the liquid.
Syringe needle claims
What is claimed is:
1. Auto-non-reusable syringe-needle system for injection, for a
unique use, formed by a barrel to contain the fluid to be injected,
in which a piston impelled by a plunger slides, generally hand operated;
characterized because in the inner surface of the ejecting part
of the barrel of the syringe-needle system, located between the
front side of the completely introduced piston and the tip of the
cannula opposite to the bevel, there is an emergent ring that forms
two fixed seats in both sides of the valve and coaxially arranged
and surrounded by the said ring there is a mobile body of the valve
formed by a revolution body axially mobile by the depression and
pression of the fluid transmitted by the piston during the moments
of aspiration and injection of the said fluid respectively, having
the mentioned revolution body of the valve, in its back part --of
the piston side--an emergent circular edge, substantially elastic
and flexible, forming two mobile seats of the valve in both sides
and a plurality of peripheral ledges in its front part alternate
with a plurality of grooves that allow the entrance of the fluid
when the plurality of ledges reach the front part of the ring during
the syringe aspiration process, as well as when the mobile body
of the valve reaches the end of its run during the injection process,
being the position of the body of the valve before starting its
use such that the mentioned ring is placed between the elastic edge
and the plurality of ledges; during aspiration, the mobile body
of the valve moves backwards until the plurality of ledges reach
the ring, which avoids that the mobile body of the valve is drawn
by the fluid into the barrel at the same that the fluid itself goes
through the plurality of grooves; during the injection process,
when it starts, the mobile body of the valve is moved by the current
of the fluid until the front part of the elastic edge reaches the
back part of the ring, thus avoiding the pass of the fluid and the
increase of pressure makes the circular edge flex and compress until
the ring is surpassed, thus allowing the pass of the fluid and avoiding
from that moment on the reuse of the syringe because, when it is
tried to be reused, when the fluid is aspired, the mobile body of
the valve moves backwards until the back part of the edge reaches
the front part of the ring, forming a tight closure and avoiding
the syringe refilling, getting in this way the aim pursued.
2. Syringe-needle system, as per claim 1 characterized because
the fix and mobile elements of the valve can form an independent
set to be assembled in the ejecting area of the barrel of the syringe-needle
system.
3. Syringe-needle system as per claim 1 characterized because
the back part of the revolution body that forms the mobile body
of the valve extends the emergent circular edge, having a plurality
of ledges in its extension of a minor outer diameter than the inner
diameter of the surface of the ejecting part where it is placed,
but of larger diameter than the inner diameter of the ring, alternate
with a plurality of grooves that allow the entrance of the fluid.
Syringe needle description
The object of the presents invention is a system of auto-non-reusable
syringe-needle for injections, that is to say, that can have only
one and unique use, independently of the user's wish.
The known syringes for single use carry out the function of injecting
any fluid and are discarded. But they have the great inconvenient
of being unduly reused, with the subsequent risk of germ transmission,
which can only be avoided if they are discarded after their first
and unique use.
We subsequently propose a system that avoids the reuse of the mentioned
syringe-needle system, independently of the user's wish.
This system is based on a valve that allows the suction and filling
of the syringe, as well as the injection or emptying, changing the
valve's position in this last phase, in such a way that when it
is tried to be reused, it blocks the fluid passage, avoiding thus
the refilling of the syringe.
For better comprehension we attach some figures, where several
examples of realization are illustrated, for showing but not limiting
some of the many possible variants from the same inventive concept.
FIG. 1 is a view of the longitudinal cut of the syringe object
of this invention.
FIG. 2 is an enlarged view of the valve in longitudinal cut, placed
in the syringe shown in FIG. 1 in the position of suction moment.
This valve carries out the function of making the syringe unusable
after its first use.
FIG. 3 shows a similar view to the latter in the position it is
placed in the moment when injection starts and where it continues
after injection.
FIG. 4 shows a cut as per cutting line IV--IV of FIG. 2.
FIG. 5 shows a frontal view of the mobile valve, corresponding
to one of the realization variants.
FIG. 6 shows the same variant of FIG. 5 in longitudinal cut, inside
the cavity where it is placed.
FIGS. 7 8 and 9 also show views in longitudinal cut of another
realization variant of the valve situated in different places of
the ejection part. FIG. 9 illustrates a complete valve set situated
in any area of the ejection part of the mentioned syringe-needle
system. FIG. 10 shows a frontal view of the mobile element of the
valve represented in FIGS. 7 8 and 9.
With reference to all figures in general, and to FIGS. 1 to 4 in
particular, we can see the auto-non-reusable syringe of the invention,
formed by a barrel to contain the fluid (1) in which a piston slides
(2) impelled by a plunger hand operated (3). All the above mentioned
elements are known and usual in syringes for single use.
The ejecting part of the syringe-needle system located between
the extreme position of the totally introduced piston (2) and the
tip of the cannula (4) opposite to the bevel, has an emergent-ring
of the inner surface, that forms at least two valve seats (6) and
(7).
Coaxially arranged and surrounded by the said emergent ring-shaped
seats it is placed the mobile element (8) of the valve formed by
a body of revolution axially mobile due to the depression and pression
of the fluid caused by the piston (2) when aspiration and injection
of the said fluid happen respectively, having the mentioned body
of revolution, in its back part, of the side of the piston (2),
a circular emergent edge (9), substantially elastic and flexible,
that forms two mobile seats of the valve in both sides and a plurality
of ledges or ribs (10) in its front area, peripherally arranged,
forming a plurality of grooves (11) that allow the entrance of the
fluid when the plurality of ledges (10) reach the front part of
the seat (7) of the ring (5) during the aspiration process of the
syringe as well as when the mobile element (8) reaches the end of
its run during the injection process. Being the position of the
mobile element (8) before starting its use such that the mentioned
ring (5) is placed between the elastic edge (9) and the plurality
of ledge (10).
During the aspiration, the mobile element (8) moves backwards until
the plurality of ledges (10) reach the ring (5) which avoids that
the mobile element (8) is drawn by the fluid out of ejection part
of the barrel at the same time that the fluid itself goes through
the plurality of grooves (11). During the injection process, when
it is started, the mobile body of the valve (8) is drawn by the
fluid current until the front part of the elastic edge (9) reaches
the back part of seat (6) of the ring (5), stopping the pass of
the fluid making the mentioned edge (9) flex and compress through
the increase in pressure of the liquid on the valve until the ring
(5) is surpassed; avoiding from that moment on the reuse of the
syringe because, if it is tried to be reused, when aspiring the
fluid, the mobile body of the valve (8) moves backwards until the
back part of the edge (9) reaches the front part of the ring (5),
forming a tight closure and avoiding the refilling of the syringe,
getting in this way the aim pursued. |