Abstrict This design relates to a disposable syringe assembly with possibly
small-sized finger grip, while any part of the syringe is applicable
for injection and medicaments are pre-filled for quick use. In particular,
the device of this design relates to a disposable syringe assembly,
comprising: plunger (40) having an oval shape at the front end and
plunger tip (41) at the terminal end; plunger rod (50) having a
disc (53) at the end of a screw (51) combined with a plunger tip
(41) of said plunger (40); glass tube (10) where one side is clogged
by the plunger (40), the other side is sealed by a rubber seal (21)
and aluminum cap (25), and its outer diameter coincides with that
of projection (17a) clogged by said plunger (40); finger grip (30)
having a groove (33) to insert the projection (17a) of said glass
tube (10) and a ring (31) as well; needle hub (60) having the inserted
part sealed by a rubber seal (21) and aluminum cap (25) into said
glass tube (10) as well as a needle hub mount (63) to hold two annular
projections (67a, 67b) and needle (71) within an internal diameter;
needle shield (73) being attached to a needle mount (63) of said
needle hub (60). Since the finger grip has also a hexagonal shape,
the device of this design has several advantages in that a) any
part of syringe grip may be applicable prior to use, b) by preventing
the displacement of a plunger before or after use, the discharge
of contents during use or storage may be prevented, and c) the device
cannot be refilled after use. Further, the device of this design
is very useful in achieving the innate object of a disposable syringe
assembly by solving the full administration of pharmaceuticals.
Further, by detachedly mounting the rubber seal and aluminum cap,
the device of this design can effectively prevent the mixing of
aluminum particles into the medicaments.
Claims What is claimed is:
1. In a disposable syringe having a plunger having one end telescopically
disposed in an open end of a glass tube for manually-activated axial
movement toward an axially opposed sealed end of the glass tube
and a hollow needle having one end disposed to rupture the sealed
end to release through the needle an injectable composition contained
in the glass tube, and a removeable needle shield covering the other
end of the needle, the improvement comprising:
a seal element disposed on the one end of the plunger to force
injectable composition toward the sealed end of the glass tube upon
axial movement of the plunger;
a grip element fixed to the open end of the glass tube, the grip
element including an outwardly-projecting annular flange disposed
for manual gripping during use of the syringe and an inwardly-projecting
annular flange disposed to engage the seal element and prevent removal
of the plunger from the glass tube; and
a needle hub having a needle mount at one axial end and a chamber
open at the other axial end, the needle mount holding the needle
to fix the one end thereof in a predetermined position in the chamber
and the chamber being disposed to slidably, coaxially receive the
sealed end of the glass tube, the chamber including two axially-spaced,
generally parallel, annular projections disposed to engage the sealed
end of the glass tube in spaced, axial relation to the one end of
the needle and, upon use of the syringe, to permit relative axial
movement of the tube toward the needle mount to rupture the seal
with the one end of the needle, the needle hub being the sole structural
connection between the needle and the glass tube.
2. The syringe of claim 1 wherein the seal element is coaxially
threaded to the one end of the plunger.
3. The syringe of claim 1 wherein the glass tube includes an annular
bead proximate the open end thereof and the grip element includes
an annular groove disposed to engage the bead and fix the grip element
to the open end of the glass tube.
4. The syringe of claim 1 wherein the seal element comprises an
outer metal cap including an annular, axially extending skirt engaging
the glass tube proximate the sealed end thereof and wherein the
distance between the two annular projections is substantially equal
to the axial length of the cap skirt.
Description BACKGROUND OF THE INVENTION
1. Field of the Invention
This design relates to a disposable syringe assembly and more particularly,
to a disposable syringe assembly with possibly small-sized finger
grip, while any part of the syringe is applicable for injection
and medicaments are pre-filled for quick use.
2. Description of the Prior Art
Currently, disposal pre-filled syringe assemblies for dispensing
parenteral pharmaceuticals by injection are not new per se. Many
syringe assemblies have been proposed which employ a glass tube
filled with the desired medicaments.
The conventional disposable syringe assembly structure is constructed
in such a manner that at one end of the glass tube is a plunger
tip which functions as a seal for medicaments, while at the other
end of the glass tube is a seal in the form of an elastomeric disk
held in place by a plastic or metal rod.
Further, the needle design which is generally used with disposable
pre-filled syringe assemblies involves the use of a double ended
needle assembly which is attached to the sealed end of the glass
tube in a first position where the needle is aligned with the needle
hub but not penetrating the seal.
The needle then is movable to a second position whereby the interiorly
pointing end of the needle penetrates the seal and provides assess
to the contents. The other end of the needle which is, of course,
the end through which the medicine is administered to the patient,
is covered by a needle shield.
Particularly, none of the prior art provides a compact assembly
which is provided with a functional locking mechanism to prevent
inadvertent movement or damage to seals at either end of the pre-filled
containe.
Furthermore, a rubber portion is liable to be depressed during
the sealing of an aluminum cap and then, aluminum particles are
attached to the rubber portion.
Finally, the finger grip structure has recognized some disadvantage
in that fingers should accurately be folded on two protruded support
humps, when administered.
SUMMARY OF THE INVENTION
Accordingly, to overcome the aforementioned problems, it is an
object of this design to a) decrease the volume of a finger grip
to a great extent, b) freely use any parts of the syringe assembly,
c) prevent the displacement of a plunger before or after using the
syringe assembly, and d) administer a full amount of medicaments.
Further, another object of this design is to provide a disposable
syringe assembly which can be safely stored or transported from
any outer impact and cannot be re-filled for use, thus achieving
the innate object of a disposable syringe assembly.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is an elevational view of this design;
FIG. 2 is a cross-sectional view of this design;
FIG. 3 is a partial cross-sectional view of the glass tube sealed
with aluminum cap of this design;
FIG. 4 is a cross-sectional view where a plunger rod is mounted
on a plunger tip of this design;
FIG. 5 is a perspective diagram showing a finger grip of this design;
FIG. 6A is a cross-sectional view showing a needle hub of this
design;
FIG. 6B is a cross-sectional view showing Luer lock needle hub
of this design;
FIG. 7 is a diagram showing this design while not employed;
FIG. 8 is a diagram showing this design while in operation.
DETAILED DESCRIPTION OF THE INVENTION
To achieve the above object, the device of this designed related
to a disposable syringe assembly, comprising:
plunger 40 having an oval shape at the front end and plunger tip
41 at the terminal end;
plunger rod 50 having a disc 53 at the end of a screw 51 combined
with a plunger tip 41 of said plunger 40;
glass tube 10 where one side is clogged by the plunger 40 the
other side is sealed by a rubber seal 21 and aluminum cap 25 and
its outer diameter coincides with that of projection 17a clogged
by said plunger 40;
finger grip 30 having a groove 33 to insert the projection 17a
of said glass tube 10 and a ring 31 as well;
needle hub 60 having the inserted part sealed by a rubber seal
21 and aluminum cap 25 into said glass tube 10 as well as a needle
hub mount 63 to hold two annular projections 67a, 67b and needle
71 within an internal diameter;
needle shield 73 being attached to a needle mount 63 of said needle
hub 60.
This design is explained in more detail as set forth hereunder
by referring to the accompanying drawings.
FIG. 1 is an elevational view of this design; FIG. 2 is a cross-sectional
view of this design; FIG. 3 is a partial cross-sectional view of
the glass tube sealed with aluminum cap of this design; FIG. 4 is
a cross-sectional view where a plunger rod is mounted on a plunger
tip of this design; FIG. 5 is a perspective diagram showing a finger
grip of this design; FIG. 6A is a cross-sectional view showing a
needle hub of this design; FIG. 6B is a cross-sectional view showing
Luer lock needle hub of this design; FIG. 7 is a diagram showing
this design while not employed; and FIG. 8 is a diagram showing
this design while in operation.
First, referring to the drawings and particularly to FIGS. 1 through
6 thereof, there is illustrated one embodiment of a disposable syringe
device in accordance with the invention which is generally designated
by the reference number 100.
The syringe device 100 is adapted to be pre-filled with any suitable
medicament which doctors, veterinarians, and other uses of syringes
may wish to have readily available and store over a long period
of time.
Devices filled with pharmaceutical materials in a ideally clean
environment such as in a pharmaceutical laboratory cannot be duplicated
in the field where pre-filled syringes are often needed.
Thus refilling the syringe assembly in the field presents additional
risks to the patients and, accordingly, the unit is normally disposable.
The disposable syringe assembly 100 of the present design includes
a glass tube 10 which has a finger grip 30 on one end and a needle
hub 60 for mounting a needle on the other end.
The needle hub 60 has a similar shape of a needle 71 and can be
replaced by a needle hub 160 having a similar length.
Also provided as a part of assembly is a hollow plunger 40 which
has a plunger tip 41 at the terminal part.
As will be described hereinafter, the end of the glass tube 10
having the needle hub 60 is sealed prior to use.
The contents 19 are kept in the glass tube 10 by the plunger 40
which effectively seals the other end of the glass tube 10.
The plunger tip 41 formed at the end of the plunger 40 is mounted
on a screw 51 of a plunger rod 50.
The plunger 40 is usually made from a particular formulation which
the pharmaceutical manufacturer knows is compatible with the contents
19. A preferred material is manufactured from an extremely stable
rubber.
The finger grip 30 is slidably mounted onto the outer diameter
17 of the glass tube 10 by a base which may also include a ring
31 to prevent movement of the finger grip 30 too far down the glass
tube 10.
Also, the projection 17a is mounted at the end of the glass tube
10 to prevent the displacement of the finger grip 30 which is mounted
on the glass tube 10. The projection 17a is mounted on a groove
33 which is formed in the finger grip 30 to prevent the displacement.
Further, at the opposite end of the finger grip 30 is a needle
hub 60 which may mounted a needle hub 71.
The inner diameter 61 of the needle hub 60 has the same diameter
as the outer diameter of the aluminum cap 25 for mounting the hub
on the glass tube 10.
As will be described hereinafter, the aluminum cap 25 serves to
protect the rubber seal 21 used for sealing one side of the glass
tube.
The rubber seal 21 includes protruded support hump side 21b at
the site inserted into the glass tube 10 and a round projection
21a at the contact site with the aluminum cap 2 being smaller than
a hole 25a of the aluminum cap.
The outer diameter design of the glass tube 10 sealed by the rubber
seal 21 and aluminum cap 25 is fabricated in such a manner that
the diameters inserted into the needle hub 60 and finger grip 30
are same.
As shown in FIGS. 7 and 8 the needle assembly includes a double
ended needle 71 which is held in place by a needle mount 63 and
a sealing element 65.
An annular groove 73a of a needle shield 73 is held in place on
a projection 63a of the needle mount 63.
The needle shield 73 serves to protect the needle prior to use.
The needle hub 60 also includes internal annular projections 67a,
67b which is positioned to hold the glass tube 10 during storage
when the needle 71 is in a first position in axial alignment with
the glass tube 10 but not penetrating the rubber seal 21 which is
held by the aluminum cap 25 on the end of the glass tube 10.
As mentioned in the above, when the device is operational, the
needle 73 is moved in the direction of arrow and penetrates the
rubber seal which is held by the aluminum cap.
Hence, the lower part of the aluminum cap 25 is held by the first
projection 67a of the needle hub 60 and the second projection 67b
becomes positioned at the outer shoulder part of the glass tube
10.
When the syringe assembly is operational and with the finger grip
30 held in place, the disc 53 of the plunger rod 50 is pressed with
a thumb, the plunger 40 is completely inserted into the glass tube
10 and all contents 19 within the glass tube 10 are discharged.
Hence, it is effective that the length of the plunger rod 50 is
lower than that of the glass tube 10.
To discharge all contents within the glass tube 10 the end of
the plunger 40 has an oval shape which is the same as the internal
shoulder portion 15b of the glass tube 10.
Therefore, since the disposable syringe assembly having such structure
decreases the volume of the finger grip to a great extent, this
permits the volume during storage or transportation.
Since the finger grip has also a hexagonal shape, the device of
this design has several advantages in that a) any part of syringe
grip may be applicable prior to use, b) by preventing the displacement
of a plunger before or after use, the discharge of contents during
use or storage may be prevented, and c) the device cannot be refilled
after use. Further, the device of this design is very useful in
achieving the innate object of a disposable syringe assembly by
solving the full administration of pharmaceuticals.
Further, by detachably mounting the rubber seal and aluminum cap,
the device of this design can effectively prevent the mixing of
aluminum particles into the medicaments.
As mentioned in the above, the principle of this design including
structural details and many functional benefits are illustrated
herein.
The use of the disposable syringe assembly according to this design
may be understood by those having a common knowledge to which this
design pertains. The reference numbers described in the main component
of the following patent claim is not intended to limit the technological
rights in such claims. |