Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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SPEGIFICATION
1. Name of Design: SAFETY SYRINGE
2. A brief explanation of diagram:
Diagram 1: enlarged vertical cut diagram of the
connection between the needle-fixing cap of imaginary line and
the piston body while the needle-holding body inside the
plston body of the syrlnge being designed.
Diagram 2 and 3: depicts the working of the piston on the
syringe being designed.
Diagram 2: vertical cut diagram before in~ectlon.
Diagram 3: vertical cut diagram after iniection.
Diagram 4: enlarged vertical cut diagram of the needle-
fixing cap, needle-maintaining body and plston comblned inside
the cylinder being designed.
Diagram 5: enlarged vertical cut diagram of the syringe
needle separating the needle-holding body inside the cylinder
being designed.
Diagram 6: vertical cut diagram of the syringe needle
pulled so as to be contained inside the body of the cylinder.
Diagram 7: enlarged vertical cut diagram of another
example of operation of the design.
EXPLANATION OF CODES FOR THE IMPORTANT PARTS OF THE DIAGRAM
1. Syrlnge
3. Needle-fixing cap 4. Needle-holding body
5. Piston rod 6. Piston
7. Inside wall 8. Gylinder female screw
part
9. Assembly protrusion 10. Grasping part
11. Needle 12. Flange
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13. Flxing-cap female screw 14. Inside wall
15. Holdlng body male screw 1~. Stoppage protrusion
17. Opening 18. Bell-shaped protrusion
of the holding body
19. Hole 20. Stoppage groove
21. Bell-shaped protrusion of 22. "O" rlng
piston
23. Pressing part 24. "+" type leading rib
25. Assembly groove 26. Syringe needle cap 27:
protruded part
SUMMARY OF THE INVENTION
In accordance with the present invention there is
provided a safety syrlnge comprising:
(a) a cyllndrical hollow barrel member adapted to
contaln a fluid and havlng first and second open ends and a
female thread on the inside surface of said flrst end, said
female thread being preselected to mate with a male thread on
a needle holder body;
(b) a cyllndrlcally shaped needle holder body having a
longitudinal axis, flrst and second axial.ends and further
comprislng:
(1) a male thread on the curved outer surface thereof and
being preselected to mate wlth said female thread,
~ 11) means on said first axlal end for receiving and
holding the hub of an elongated hollow needle,
(lii) a recess in said second axial end extending axlally
along said longitudlnal axis to a depth part way toward said
first axial end,
(iv) first means for transmltting rotational torque
integral with said body and located in said recess, and
(v) a central bore extending through said holder body
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along sald longltudinal axls;
~c) an elongated hollow needle including a hub, said hub
exclusively held by said hub receiving and holding means;
td) an elongated plston rod; and
(e~ a plston having inner and outer axlal ends and
further comprlslng:
(1) means connectlng said lnner axlal end thereof to one
end of sald piston rod,
(ii) an integral central axially extending protrusion on
sald outer axial end thereof constructed to flt within sald
recess of sald needle holder body, and including
(1) second means for transmittlng rotatlonal torque
integral with said protrusion and constructed to coact
with said flrst rotational torque transmltting means,
(2) snap locking means on said protrusion and said
holder body for snap locking sald protrusion to said
holder body;
whereby said needle holder body may be initially
positloned ln sald hollow barrel member wlth sald female
2~ thread engaging said male thread, and said piston on said
plston rod may be lnserted into said second open end of said
barrel member so that, upon relative axial displacement
therebetween, fluid within said barrel is pumped through said
central bore of said needle holder body and said hollow needle
exclusively held thereon, and,
whereby, upon said piston belng inserted, as
aforesaid, and axially displaced, relative to said barrel
member, to a position where at said piston central axially
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extendlng protrusion ls positloned within said recess of sald
body with said second rotational torque transmltting means
thereon engaged with sald first rotational torque transmitting
means of sald body and with said snap locking means locking
said protrusion with said body, then upon rotational tor~ue
being applled to said piston rod, said torque is transmitted
via said protruslon to said body to cause rotation of said
body relative to aid barrel member to thereby release said
male thread from said female thread following which axial
movement of said locked protrusion and said body relative to
said barrel member is facilitated, said last mentioned axial
movement being sufficient to withdraw said needle completely
within said first open end of said barrel member, thus
preventing accidental contact of said needle means by an
errant body part.
3. DETAILED EXPLANATION OF THE DESIGNs
This design is about a safety syringe, especially by
withdrawlng and fixing the syringe needle after use into the
cylinder, lts reuse is prevented and there is no danger of
getting in~ured by the needle, and, therefore, prevent
contracting various contagious diseases.
Most syringes deslgned up to now have been the
disposable types that can be discarded to prevent its reuse
after in~ecting the liquld lnto the body of cyllnder,
progressing, in~ecting into human body. Such disposable
syrlnge shows only the technical method (i.e. stoppage
protruslon and stoppage groove), not a baslc method for
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prevention of safety accident. Eventually, there are reports
of examples where the exposed syringe needle, after iniectlon
lnto an lnfected person, left alone, accidentally poked a
nurse who performed the ln~ectlon or someone else which
resulted ln contamination of the contagious disease (hepatitis
and other disease, especially AIDS).
Consequently, the purpose of this design is, after
performing in~ection lnto a human body, by withdrawing the
syrlnge needle lnto the cyllnder of the syringe and flxing it
there, the syrlnge needle contacts no one else, and thus
prevent contracting of contagious disease at the same time
stopping the needle from belng reused.
As a technical means of achleving this goal, this
design, in an ordinary syringe that forms the needle and
piston within the cylinder, screw is attached on the medicine
in~ection entrance in the cylinder body, with one end needle-
fixing cap of needle is attached, and the other end forms the
needle-holding body so as to connect the piston and the front
edge, and, therefore, after in~ection by fixlng the piston on
the needle-holdlng body, one lnserts the above-mentioned
needle-holding body into the cyllnder ltself and flxes lt,
wlth one end of the above-mentioned needle-holding body,
forming the fixed needle-cap or the female screw of the pre-
assembled fixlng-cap, and the other end forming the candle-
shape stoppage protrusion and many bell-shaped protrusions.
Furthermore, on the lnside wall toward the medlclne entrance
of the cylinder, there ls a female screw part whose screw ls
the opposite in direction as the female screw part of the
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needle-holding body. Thus it is screw-connected the male
screw part of the needle-holding body, at the same time a
candle-shaped stoppage groove and many bell-shaped protruslons
are formed so as to connect and keep the needle-holding body.
~elow, examples of actual use of this design per the attached
diagram will be described in detall. As dlagram 1 and dlagram
6 shows, the safety syringe of thls design (1) is consisted of
a cylinder (2) of a constant diameter that can lead and move
piston rod, the needle-fixing cap (3) that connects and keeps
the syrlnge needle, the screw-connectlng needle-holding body
(4) and the piston (6) that connects the end of the above-
mentloned needle-holdlng body (4) formlng one slngle body wlth
the plston rod (5) lnslde the cyllnder (2).
The above-mentloned cylinder (2) has cyllnder female
screw part (8) formed on the inside wall (7) ln certain upper
location where the above-mentloned needle-holdlng body (4) ls
inserted and integrated, and in the lower part is formed the
assembly protruslon (9) lnto whlch the stoppage groove of the
later-mentioned "+" type leading rib rests assembled, and
there is the grasping part (lO) with whlch the plston rod (5)
can be pushed forward by holdlng the lower-most part manually.
Also, the needle-holding cap (3) holds steadfastly
the needle (11) on its upper part, and on the lower part of
the needle-holding cap (3) a flange (12) is formed protruding
outside the outer perimeter of the needle-holding cap (3).
And, as the diagrams 1, 4 and 5 show, on the needle-
holding body, the female screw part of the left screw, onto
whlch flange part (12) of the above-mentioned needle-fixlng
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cap (3) ls screwed, is formed on the inslde wall(l4~ of the
needle-holdlng body (4), and the holdlng body male screw part
(15) of the right screw is formed on the outer perimeter of
the lower center of thls needle-holdlng body (4).
Also, rear edge of thls needle-holdlng body (4) ls
formed the stoppage protruslon (16) protrudlng lnward lnslde
the round openlng part (17~, and, on the surroundlng lnslde
wall, many bell-shaped protrusions (12) of the hodlng body are
formed protruding, and on the upper center of thls needle-
holdlng body (4), a penetratlng hole (19) ls formed through
whlch the ln~ected ll~uld passes. In short, as the dlagram 1
reveals, the male screw (15) of the needle-holdlng body (4),
ln which the cylinder (2) becomes inserted, contacts the
cyllnder female screw part (8) above the cyllnder (2)
and tur-nlng ln the dlrectlon of the right screw by means of
several manual operatlons or automatlc mechanical process,
becomes flxed and connected lnslde the cyllnder (2), the
flange part (12) of the needle-flxlng cap (3) that holds and
keeps steadily the needle (11) to the female screw part of the
flxing cap on the lnslde wall (14) of the needle-hodlng body
thus connected and flxed becomes screw-connected in left screw
dlrection, and so the needle-holdlng body (4) and the needle-
fixlng cap (3) becomes connected and flxed above the cylinder
(2).
Also, as dlagrams 1 and 4 show, on the plston (6)
that ls assembled and inserted to the openlng part (17) of the
rear edge of the above-mentloned needle-holdlng body (4), ls
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formed a candle-shaped stoppage groove (20) on its front edge
hinged on and so connected with the stoppage protrusion (16
of the above-mentloned needle-holding body (4), and a bell-
shaped protruslon (21) intertwlned with the stoppage
protruslon (16) of the above-mentloned needle-holdlng body
(4), and also the bell-type protrusion (21) that becomes
intertwined and connected wlth the above-mentioned U-shaped
bell-type protrusion (18) protrudes on the outer perlmeter of
the plston (6). Also, on thls plston (6) a "C" rlng (22) of
rubber materlal ls flxed and thus closely in contact with the
inslde wall (7) of the cyllnder (2), a "+" shaped leadlng rlb
(24) and plston rod (5) are glued and flxed together lnto one
body with round presslng part (23) ln one plece on the rear
edge of thls plston (6). At a certaln place ln the lower side
of this "+" shaped leading rib (24) are formed grooves (25)
that can be hinge-connected with the assembly protrusion (9)
of the above-mentloned cyllnder (2) as dlagrams 2, 3, and 6
show, and thus when the plston (6) moves downward, l.e. ln
reverse dlrection, lt becomes hlnge-connected, and, ln so
doing, can prevent the plston rod (5) from belng released
completely. In sum, while the needle-holding body (4) and the
needle fixlng cap (3) are lnterconnected with screw ln
opposlte dlrectlon to the cylinder (2), upon removlng the
syringe needle cap (26) as depicted as the lmaglnary line ln
the dlagram 1, in~ectlng the medicine through the hole (1) of
the needle-holdlng body by moving forward the piston (6)
toward the entrance of the in~ected medlclne, makes the
location of the plston (6) approximately as depicted ln
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diagram 3, and under such circumstances, upon removlng the
syringe needle (11) from
human body, movlng lt to the extent deplcted ln dlagram 4, the
stoppage groove t20) of the piston (6) comes to rest in the
stoppage protruslon (16) of the opening (17) of this needle-
holding body (4) so that the plston (6) may get connected to
the needle-holding body (4) inside the cylinder (2).
Diagram 7, an example of another application of this
design, ls slmpllflcation of structure through forming a
holding body male screw part ~15) ~ust around its outer
perimeter on the needle-holding body (4) that comes screw-
flxed inslde the cyllnder (2).
Different from the above-mentioned actual example,
without forming a fixing cap female screw part (13) on the
inside wall (14) of the needle-holding body (4) for
screw-connecting, but simply forming a protruding part (27),
the structure purports to malntain steadfastly the
needle-fixing cap (3) by closely connecting the inside wall of
the needle-fixing cap (3).
The following ls a detalled description of the
workings and effects of the design, structured as above.
First o~ all, in screw-connectlng by lnserting the
needle-holding body (4) into the cylinder (2), one inserts the
needle-holding body (4) at the lower side of the cylinder (2)
(on the grasping part (lO) side of diagrams 3 and 6), pushes
lt up by certain length, turns approximately 1/4 to 1 turn
clockwise the needle-holdlng body (4) elther manually or
automatically at the point where the cylinder female screw
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part (2) on the lnside wall (7) of cylinder (2) touches the
male screw part around the outer perlmeter of the
needle-holding body (4), and, by so doing, connects and fixes
lt inslde the cylinder (2).
Under such circumstances, as shown in diagram 1, one
connects and fixes the syringe needle (11) in the imaglnary
llne inside the needle-holding body (4) by screwing
counterclockwise lts flange part (12) and the fixlng cap
female screw part (13) on the lnslde wall (14) of the needle-
holding body.
In screw-connecting this syringe needle (11), the
screw-connecting dlrectlon must be the opposite of that
between the cylinder (2) and the needle-holding body (4).
Thus whlle the needle-flxlng cap (13) is lnserted,
upon removing the additlonal syringe needle cap (26) covering
the syringe needle (11) as the imaginary llne in diagram 1, ln
order to in~ect lnto a human body, one has to move forward the
plston (6) of piston rod (5) approximately from sltuation
shown in diagram 2 to that in dlagram 3.
Furthermore, upon performlng such ln~ectlon, after
wlthdrawlng the syrlnge from the human body, pushlng up
further toward the medlclne entrance the presslng part (23) of
the "+" shaped leadlng rlb (24) as shown ln dlagram 4 entwlnes
the bell-shaped protruslon of the needle-holding body (4) and
the plston's bell-shaped protruslon (21) on the front edge of
the piston (6) mutually, so that the front edge of the plston
(6) becomes wound into the lnslde of the openlng (17) of the
needle-holdlng body (4).
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Thus, when the piston l6) comes squeezed into the
opening part (17) of the needle-holdlng body (4), lt becomes
posslble for the stoppage protruslon (16) of the
needle-holdlng body (4) and the stoppage groove (20) becomes
posslble to turn together as shown ln dlagram 4.
Such method of cogglng (between stoppage protruslon
(16) and stoppage groove (20)) makes lt posslble to closely
flx the piston (6) and the needle-holdlng body (4), thus
preventing as a result the reuse of the syrlnge.
Furthermore, under such circumstances, turnlng the
piston (6) clockwlse keeps the bell-shaped protrusion (18) of
the opening part (17) of the needle-holdlng body (4) touchlng
the bell-shaped protrusion (21) of the piston on the outer
perimeter of the piston (6), hlnged in close contact.
This is the situation ln diagram 4. The mutually
reverse dlrectlon of the candle-shaped part ln unltlng the
needle-holding body (4) and the piston (6) by the above-
mentioned bell-shaped protrusions (18)(21) makes it very easy
to assemble the two materlals together.
In sum, while the needle-holding body (4) and the
piston (6) connected by the bell-shaped protrusion (18)~21),
turning approxlmately 1/4 to 1 turn the presslng part (23) of
the "+" shaped leadlng rib (24) ln the screw-connectlng
directlon of the plston (6), that ls, clockwlse, wlll release
the screw- connectlon of the female screw of cyllnder (8) and
the male screw part (15) of the holding body as in diagram 5.
Moreover, while the screw parts of the two are
released pulllng the presslng part (23) of the "+" shaped
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leading rib (24) removes the plston (6) in reverse dlrection
downward resulting in interconnection of the assembly
protrusion (9) on the lnside wall (7) of the cylinder (2) and
the assembly groove (25) of the "+" shaped leading rib (24l
and consequently prevent the release of the needle-fixing cap
(3), the needle-holdlng body (4) and the plston (6) at a
certain place as shown in diagram 6.
In other words, upon in~ection the above-mentioned
syringe needle (11) can be moved in reverse downward direction
as in dlagram 6, thereby avolding belng poked by or have
contact with, the syrlnge needle (11) because syrlnge needle
(11) becomes contalned completely lnslde the cyllnder (2),
and, consequently, preventing infection.
Furthermore, another example of a practical
appllcatlon of thls deslgn is a structure that closely
comblnes the inside wall of the needle-flxlng cap (3) wlth the
outer perlmeter of the protruding part (27) of the
needle-holdlng body, which ls a more slmpllfled structure and
whose operatlon and effect are ldentlcal wlth the original
example.
Consequently, according to this design, upon
injecting into a human body, by fixing lnto the lnside of the
cylinder (2) the needle-holding body that is connected to the
syringe needle (11) out of sight, one ellminates the risk of
the syrlnge needle (11) contactlng someone else and thereby
prevent lnfectlon of contagious disease.
Furthermore, one can obtain the sealing effect by
maklng the two auxiliary materlals that come lnto mutual
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Also, according to this deslgn, upon in~ectlon, while
connection ls complete between the needle-holdlng body (4) and
the plston (6) wlth the stoppage protruslon (16) and the
stoppage groove (20), the "+" shaped leading rlb (24), the
combination of the assembly protrusion (9) and the assembly
groove (25~ on the inside wall (7) of the cyllnder (2) can
prevent the reuse of the syrlnge.
In concluslon, thls deslgn, by pulllng and
flxlng, upon in~ection, the syringe needle attached to the
cyllnder, is a useful one that can prevent the infectlon of
contagious disease, especially AIDS.
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