US3583399A - Self-aspirating syringe - Google Patents

Self-aspirating syringe Download PDF

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US3583399A
US3583399A US3583399DA US3583399A US 3583399 A US3583399 A US 3583399A US 3583399D A US3583399D A US 3583399DA US 3583399 A US3583399 A US 3583399A
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Prior art keywords
membrane
ampul
plunger
tubular body
syringe
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Anthony F Ritsky
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Astra Pharmaceuticals Ltd
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Astra Pharmaceuticals Ltd
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2403Ampoule inserted into the ampoule holder
    • A61M2005/2414Ampoule inserted into the ampoule holder from the side
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2433Ampoule fixed to ampoule holder
    • A61M2005/2437Ampoule fixed to ampoule holder by clamping means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M5/2455Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened
    • A61M5/2466Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase
    • A61M2005/247Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic with sealing means to be broken or opened by piercing without internal pressure increase with fixed or steady piercing means, e.g. piercing under movement of ampoule
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2477Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic comprising means to reduce play of ampoule within ampoule holder, e.g. springs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M2005/3112Incorporating self-aspirating means, e.g. to provide flashback
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/3148Means for causing or aiding aspiration or plunger retraction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S604/00Surgery
    • Y10S604/90Telltale showing entry of blood into body inserted conduit

Abstract

A hypodermic syringe for medical, dental, or veterinary use employing cartridge ampuls of injectable fluid arranged to be automatically self-aspirating. A resilient membrane is deflected at the forward end of the ampul rearwardly of the ampul each time the syringe plunger is actuated, so that upon release of the plunger the membrane is automatically resiliently restored to its normal position thereby producing conditions of reduced pressure or aspiration within the ampul. The membrane is deflected on a stud positioned at the forward end of the ampul-receiving cavity in the syringe, or on a movable flanged tubular element on the ampul adjacent the membrane and projecting forwardly of the ampul.

Description

United States Patent H 13,ss3,399

[72] Inventor Anthony F. Ritsky 2,660,168 11/1953 Pontius ..(128/218PUX) Clarkson, Ontario, Canada 2,798,487 7/1957 Ferguson..... 128/218P [21] App1.No. 854,054 3,295,525 1/1967 Evers et a1. 128/218PX [22] Filed Aug. 29, 1969 3,368,558 2/1968 Sarnoff 128/218D Patented June 8, [73] Assignee Astra Chemicals Ltd.

453011 11/1948 Canada M dd ta issauga On no Canada 59,880 2/1954 France 1,508,686 11/1967 France 54 SELF-ASPIRATING SYRINGE Primary Examinerlos eph Reich 10 Claims, 6 Drawing Figs. Alwrney$mart and Bigger [52] US. Cl 128/218D,

l23/218? 128/22l 128/272 ABSTRACT: A hypodermic syringe for medical, dental, or (51] Int. Cl A6lm 5/24, veterinary use employing cartridge ampuls f injectable fl id 1 1/06 arranged to be automatically self-aspirating. A resilient mem- [501 Field of Search 128/218 R, brane is d fl t d at the f d end f the ampul rearwardly Z 21 218 D, P, 221, 272 of the ampul each time the syringe plunger is actuated, so that upon release of the plunger the membrane is automatically [56] References cued resiliently restored to its normal position thereby producing UNITED STATES PATENTS conditions of reduced pressure or aspiration within the ampul. 1,712,070 5/1929 Cressler 128/218D The membrane is deflected on a stud positioned at the forward 1,798,117 3/1931 Brockway.... 128/22 1 X end of the ampul-receiving cavity in the syringe, or on a mova- 2,020,828 11/1935 Goldberg..... 128/272X ble flanged tubular element on'the ampul adjacent the mem- 2,244,969 6/1941 Smith 128/218D brane and projecting forwardly of the ampul.

IO l6 PATENTED JUN 8197! INVENTOR THONY ERITSKY ATTORNEYS.

SELF-ASPIRATING SYRINGE BACKGROUN D OF THE INVENTION This invention relates to improvements in hypodermic syringes and in particular to a new or improved self-aspirating syringe. Aspiration" is the procedure whereby an operator in making an injection determines whether or not the needle is in a proper position for injecting to prevent inadvertent deposition of injection solution directly into a blood vessel which could cause untoward patient reaction. After the needle has been inserted in the area to be injected, the syringe is manipu' lated to create a reduced pressure within the fluid to be injeeted whereby if the needle is uncorrectly positioned, blood from the area to be injected is drawn back through the hypodermic needle into the syringe where it can be observed by the operator.

DESCRIPTION OF THE PRIOR ART In the medical, dental and veterinary fields cartridge am puls of injectable fluid are now commonly used in hypodermic syr inges. Such ampuls usually comprise a cylindrical container of glass or clear plastics material, the forward end of which is sealed by a rubber membrane and the rear end of which is sealed by a rubber piston which is slidable within the body of the container. In use such cartridge ampuls are positioned within the barrel of a syringe so that the membrane is pierced by the rear end of the needle and the rubber piston is ad vanced by a thumb-operated plunger to inject the fluid. Where such a syringe is required to be capable of aspiration, it has generally been found necessary to form the syringe plunger with a pointed tip having barbs or flukes so that when the plunger is pressed forward to engage the piston of the ampul, the barbs or flukes bite into the material of the piston so that the piston can be drawn rearward slightly by the plunger to create conditions of aspiration within the ampul.

SUMMARY OF THE INVENTION According to the present invention there is provided a selfaspirating syringe adapted for use with a plunger-type cartridge ampul of the type comprising a tubular body filled with injectable fluid closed at one end by a movable piston member and at the other end by a flexible membrane, said syringe comprising: a body member having a cavity adapted to accommodate therewithin one of said cartridge ampuls, and having axially disposed openings at the front and rear ends thereof; a plunger member extending through the opening at the rear end of said cavity and slidable with respect thereto, said plunger having a head at its forward end adapted to engage the said movable piston member to slide the same forwardly within said tubular body, and a thumb piece or palm rest at the rear end thereof for pressing said plunger forward; a adapter within the opening at the front end of the syringe body member arranged to receive and secure hypodermic needle in axial alignment with said tubular body with the rear end of the needle extending through said flexible membrane into said injectable solution; and stud means at the front end of said cavity projecting rearwardly thereof and adapted to engate said membrane whereby upon movement forward of said tubular body under the influence of said plunger, said membrane is stretched rearwardly of said tubular body, and upon release of said influence said tubular body moves rearwards under the influence of said stretched membrane to create conditions of aspiration within said tubular body.

With this arrangement, conditions of aspiration are created within the ampul each time the plunger is released.

Preferably the plunger is guided within a bushing in the opening in the rear end of the body member, the bushing itself being movable axially of the opening and being resilient urged in a forwards direction to engage the rear end of the cartridge ampul. Preferably, the rear end of the bushing carries a flange to the rear of the syringe body whereby the bushing can be manually engaged and moved axially to cause aspiration of the syringe without movement of the plunger. The stud means may comprise a central rearwardly projecting stud integral with the adapter or alternatively may comprise a collar on the hypodermic needle itself arranged to seat against the rear face of the adapter when the needle is secured therein.

From another aspect, the invention provides a plunger-type cartridge ampul comprising a generally tubular container having a rear end sealed by a piston which is movable axially of the container, and a front end sealed by a resilient membrane associated with which is a central forwardly projecting element which is capable of transmitting to the membrane a deflection inwards of the front end of the container. The forwardly projecting element associated with the membrane performs the same function as the stud means referred to above in the aspiration of the syringe.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will further be described with reference to the accompanying drawings wherein:

FIG. I is a perspective view of a plunger-type cartridge am- P FIG. 2 is a longitudinal sectional view of a self-aspirating hypodermic syringe according to the invention;

FIG. 3 and 4 are fragmentary sectional views to a larger scale illustrating details of the operation of the syringe of FIG.

FIG. 5 is a fragmentary sectional view showing a modified syringe;and

FIG. 6 is a fragmentary longitudinal sectional view of a modified cartridge ampul according to the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates a cartridge ampul 10 of known kind which comprises a container defined by generally cylindrical glass wall sealed at one end by a rubber piston 11 and at the other end by a rubber membrane 12. The injectable fluid is sealed in the container between the piston 11 and membrane 12. The membrane is secured against the end of the container by an annular sheet metal collar 13, one end of which is spun or crimped into a depression 14 in the surface of the container and the other end of which carries an inwardly projecting radial flange 15 which overlies the peripheral area of the membrane and presses it against the end of the container.

The syringe generally indicated at 16 in FIG. 2, comprises a cylindrical barrel [7 defining a cavity 18 to receive a cartridge ampul 10. As is common practice, the barrel 17 is formed with a large axially extending aperture (not shown) in its wall to permit insertion and removal of the ampul. The forward end of the barrel is secured to a fitting I9 formed with a central axially directed screw-threaded opening 20. An adapter 21 in threaded engagement with the opening 20 is formed with a central stud 22 which projects rearwardly into the cavity 18. The front end of the adapter 21 is formed with a spigot 23 which is in threaded engagement with a hub 24 which carries an axially extending hypodermic needle 25. The needle 25 extends rearwardly from the hub through an axial bore 26 in the adapter and in the stud 22 and extends into the cavity 18 beyond the stud 22.

The rear end of the barrel I7 is received in a fitting 27 which carries a pair of laterally extending finger grips 28. A sleeve 29 in threaded engagement with the fitting 27 carries at its rear end a gland 30 having a radial flange 31. The gland 30 extends forwardly within the sleeve 29 and its inner surface forms a smooth cylindrical continuation of the inner surface of the barrel 17. A bushing 32, which extends through an axial hole in the gland 30, has a flanged head 33 which is guided for reciprocating movement by the cylindrical inner surface of the gland. The rear end of the bushing 32 carries a radially extending flange 34 secured thereto by a retaining clip 35. The bushing is surrounded within the gland 30 by a compression spring 36 acting between the flanged head 33 and the end wall of the gland 30 and urging the bushing in a forward direction.

The bushing is preferably of a low friction material such as nylon and is formed with a central bore within which is slidably received a plunger 37. The forward end of the plunger carries a head 38 adapted to engage the rubber piston of an ampul 10. The plunger 37 may be pressed forward by means of a thumb plate 39 carried on the rear end thereof. In the retracted position of the plunger 37, the head 38 is received in a recess 40 in the forward end of the flanged head of the bushing 32.

To load a cartridge ampul into the syringe 16, the plunger 37 is withdrawn rearwardly and the ampul is inserted through the aperture in the barrel 17, plunger end firstv The plunger is thereafter released and the bushing 32 is advanced under the force of the compression spring 36 until the flanged head thereof engages the end of the cylindrical wall of the ampul. This movement forces the ampul 10 forward so that the membrane 12 of the ampul is pierced by the rear end of the hypodermic needle 25. In this position the end of the stud 22 at the forward end of the cavity 18 rests against the membrane 12 but the strength of the spring 36 is chosen such that this engagement does not cause any appreciable deflection of the membrane.

Subsequent forward pressure applied to the thumb plate 39 forces the ampul ll forwards until the flange 15 of the collar 13 engages the end face of the adapter 21 as shown in FIG. 3. In reaching this position, the membrane 12 is deflected by the stud 22 as shown in the Figure. Forward pressure applied to the thumb plate 39 will now cause the piston 11 to be advanced within the ampul 10 so that the fluid from the ampul is ejected through the needle 25. Upon release of the thumb plate 39, the syringe is automatically aspirated by the resilient action of the membrane 12 which restores to its normal position as indicated in FIG. 4 thus causing conditions of reduced pressure within the ampul 10. Aspiration can also be effected by pressing forward and releasing the flange 34 of the bushing 32 as indicated by the arrows in FIG. 2. The piston II is adapted to engage the internal wall of the ampul 10 with sufficient friction to enable the head 38 to cause the membrane 12 to be flexed as shown in FIGS. 3 and 4, and also to permit the ejection of the contents of the ampul when and as desired.

An alternative arrangement is shown in FIG. wherein an adapter 210, also constitutes a hub to secure a hypodermic needle 25a in the forward end of the syringe. In this case the stud means is formed not on the adapter but as a collar 41 on the needle 25a itself. As shown, the collar 41 is positioned to the rear of the adapter 210 and performs a function similar to that of the stud 22 in the embodiment of FIGS. 2 to 4.

Alternatively, the stud means instead of being associated with the syringe or with the needle can be formed as an integral part of the ampul. Thus, as shown in FIG. 6, an ampul b, generally similar to the one illustrated in FIG. 1, has an aspirating element 42 positioned between the collar 13!) and the membrane 121;. The element 42 comprises an outwardly extending radial flange 43 positioned between the radial flange b of the collar 13b and the membrane 12b and a forwardly extending tubular portion 44 extending from the front end of the ampul. It will be apparent that the ampul 10b, when fitted in a syringe 16 of the type shown in FIG. 2, the adapter of which does not have the stud 22, will perform the same aspirating function as the stud 22 or as the collar 41 in the em bodiment shown in FIG. 5.

Iclaim:

1. A self-aspirating syringe for use with a plunger-type cartridge ampul of the type comprising a tubular body filled with injectable filled fluid having a rear end closed by a movable piston member and a forward end closed by a flexible resilient membrane, said syringe comprising: a body member having means providing a cavity to accommodate therewithin one of said cartridge ampules, and having axially disposed openings at the front and rear ends thereof; a plunger member extending through the opening at the rear end of said cavity and slidable with respect thereto, said plunger having a head at its forward end adapted to engage the said movable piston member to slide the same forwardly within said tubular body, and a manually engageable actuator at the rear end thereof for pressing said plunger forward; means for mounting an adapter within the opening at the front end of the syringe body member, said adapter being arranged to receive and secure a hypodermic needle in axial alignment with said tubular body with the rear end of the needle extending through said flexible membrane into said injectable solution; and stud means adjacent to the front end of said body, projecting rearwardly therewithin and adapted to be engaged by said membrane whereby upon movement forward by of said tubular body under the influence of said plunger said membrane is stretched rearwardly of said tubular body, and upon release of said influence said tubular body moves rearwards under the influence of said stretched membrane to create conditions of aspiration within said tubular body.

2. A self-aspirating syringe according to claim 1 wherein said plunger member is guided to slide within a bushing carried within said opening at the rear end of the body member, said bushing having a front end adapted to extend within the rear end of the tubular body of the cartridge ampul, said bushing extending rearwardly through said opening at the rear end of said body member and being axially slidable therein, and wherein resilient means engaging said bushing are adapted controllably to bias said bushing in a forward direction.

3. A self-aspirating syringe according to claim 2 wherein said bushing carries a flange at the rear of the syringe body member by means of which the bushing can be engaged and moved axially to urge said cartridge ampul forward; whereby said membrane is stretched inwardly of said tubular body and upon release of said bushing the tubular body moves rearwards under the influence of said stretched membrane to create conditions for aspiration within said tubular body.

4. A self-aspirating syringe according to claim 2 wherein said resilient means comprises a compression spring surrounding a length of the bushing between a flange at the forward end thereof and the rear end of said body member.

5. A self-aspirating syringe according to claim 2 wherein the plunger has a head at the forward end thereof and the forward end of the bushing is formed with an enlarged recess of a size to accommodate the head of said plunger.

6. A self-aspirating syringe according to claim 1 wherein said stud means comprises a central rearwardly projecting stud integral with said adapter.

7. A self-aspirating syringe according to claim 1 wherein said stud means comprises a collar on said hypodermic needle arranged to seat against the rear face of the adapter when the needle is secured therein.

8. A plunger-type cartridge ampul for use in a hypodermic syringe comprising a generally tubular container having a rear end sealed by a piston which is movable axially of the container, and a front end sealed by a resilient membrane, the cartridge having a central forwardly projecting element at the forward end thereof which in use is operative to transmit to the membrane a deflection rearwardly of the front end of the container.

9. A plunger-type cartridge ampul according to claim 8 wherein said membrane is secured to the front end of the container by an annular collar which has a radial inwardly-projecting flange which overlies the peripheral area of said membrane, said element comprising a short tubular member extending forwardly from the membrane and having a radial outwardly extending flange retained between the membrane and the collar flange.

10. A self-aspirating syringe comprising a generally tubular body having a cavity and an open rear end and a plunger-type cartridge ampul received in said syringe body and comprising a tubular body filled with injectable fluid and having a rear end closed by a movable piston member and a forward end closed by a flexible resilient membrane, the syringe having an axially disposed plunger extending through the opening in the rear end thereof and into the cavity and being axially movable said plunger having a forward end having a head operative to and engaging said membrane, said abutment means being operative, upon forward movement of said ampul in said cavity under the influence of said plunger, to stretch said membrane rearwardly of said tubular body, whereby upon release of said influence said stretched membrane is operative to move said tubular body rearwardly to create conditions of aspiration within said ampul.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent 3,583,399 Dated une 8, 197i Inventor(s) Anthony F. Ritsky It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the heading below the last line thereof, insert --C1aims priority, Canadian application Serial No. 29,115, filed September 3, 1968-- Signed and sealed this 2 +th day of April 1973.

(SEAL) Attest:

EDI-YARD M. FLETCHER, J'R. ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents FORM po'mso H069) USCOMM-DC eos'ls-pe W U Sv GOVERNMENT PRINTING OFFICE r 969 O-366-33l

Claims (10)

1. A self-aspirating syringe for use with a plunger-type cartridge ampul of the type comprising a tubular body filled with injectable filled fluid having a rear end closed by a movable piston member and a forward end closed by a flexible resilient membrane, said syringe comprising: a body member having means providing a cavity to accommodate therewithin one of said cartridge ampules, and having axially disposed openings at the front and rear ends thereof; a plunger member extending through the opening at the rear end of said cavity and slidable with respect thereto, said plunger having a head at its forward end adapted to engage the said movable piston member to slide the same forwardly within said tubular body, and a manually engageable actuator at the rear end thereof for pressing said plunger forward; means for mounting an adapter within the opening at the front end of the syringe body member, said adapter being arranged to receive and secure a hypodermic needle in axial alignment with said tubular body with the rear end of the needle extending through said flexible membrane into said injectable solution; and stud means adjacent to the front end of said body, projecting rearwardly therewithin and adapted to be engaged by said membrane whereby upon movement forward by of said tubular body under the influence of said plunger said membrane is stretched rearwardly of said tubular body, and upon release of said influence said tubular body moves rearwards under the influence of said stretched membrane to create conditions of aspiration within said tubular body.
2. A self-aspirating syringe according to claim 1 wherein said plunger member is guided to slide within a bushing carried within said opening at the rear end of the body member, said bushing having a front end adapted to extend within the rear end of the tubular body of the cartridge ampul, said bushing extending rearwardly through said opening at the rear end of said body member and being axially slidable therein, and wherein resilient means engaging said bushing are adapted controllably to bias said bushing in a forward direction.
3. A self-aspirating syringe according to claim 2 wherein said bushing carries a flange at the rear of the syringe body member by means of which the bushing can be engaged and moved axially to urge said cartridge ampul forward; whereby said membrane is stretched inwardly of said tubular body and upon release of said bushing the tubular body moves rearwards under the influence of said stretched membrane to create conditions for aspiration within said tubular body.
4. A self-aspirating syringe according to claim 2 wherein said resilient means comprises a compression spring surrounding a length of the bushing between a flange at the forward end thereof and the rear end of said body member.
5. A self-aspirating syringe according to claim 2 wherein the plunger has a head at the forward end thereof and the Forward end of the bushing is formed with an enlarged recess of a size to accommodate the head of said plunger.
6. A self-aspirating syringe according to claim 1 wherein said stud means comprises a central rearwardly projecting stud integral with said adapter.
7. A self-aspirating syringe according to claim 1 wherein said stud means comprises a collar on said hypodermic needle arranged to seat against the rear face of the adapter when the needle is secured therein.
8. A plunger-type cartridge ampul for use in a hypodermic syringe comprising a generally tubular container having a rear end sealed by a piston which is movable axially of the container, and a front end sealed by a resilient membrane, the cartridge having a central forwardly projecting element at the forward end thereof which in use is operative to transmit to the membrane a deflection rearwardly of the front end of the container.
9. A plunger-type cartridge ampul according to claim 8 wherein said membrane is secured to the front end of the container by an annular collar which has a radial inwardly-projecting flange which overlies the peripheral area of said membrane, said element comprising a short tubular member extending forwardly from the membrane and having a radial outwardly extending flange retained between the membrane and the collar flange.
10. A self-aspirating syringe comprising a generally tubular body having a cavity and an open rear end and a plunger-type cartridge ampul received in said syringe body and comprising a tubular body filled with injectable fluid and having a rear end closed by a movable piston member and a forward end closed by a flexible resilient membrane, the syringe having an axially disposed plunger extending through the opening in the rear end thereof and into the cavity and being axially movable said plunger having a forward end having a head operative to engage the piston member of the ampul to slide the same forwardly within said tubular body, an actuating member at the rear end of the plunger for manual actuation thereof, the syringe having a forward end formed with an axial opening in which is received means mounting a hypodermic needle in axial alignment with the tubular body of the ampul, said needle having a rear end piercing said membrane and extending into said ampul, and abutment means positioned between the forward end of the syringe body and the resilient membrane and engaging said membrane, said abutment means being operative, upon forward movement of said ampul in said cavity under the influence of said plunger, to stretch said membrane rearwardly of said tubular body, whereby upon release of said influence said stretched membrane is operative to move said tubular body rearwardly to create conditions of aspiration within said ampul.
US3583399A 1968-09-03 1969-08-29 Self-aspirating syringe Expired - Lifetime US3583399A (en)

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Application Number Priority Date Filing Date Title
CA29115 1968-09-03
US85405469 true 1969-08-29 1969-08-29

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US (1) US3583399A (en)
BE (1) BE738268A (en)
CA (1) CA873458A (en)
FR (1) FR2017285A1 (en)
GB (1) GB1252306A (en)
NL (1) NL6913362A (en)

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797487A (en) * 1970-10-29 1974-03-19 Woelm Fa M Hypodermic syringe with clutch for aspiration
US3809298A (en) * 1973-07-18 1974-05-07 Precision Sampling Corp Syringe
US3878846A (en) * 1971-12-13 1975-04-22 Spad Lab Hypodermic syringe with parts disposable after use
US3977402A (en) * 1975-03-25 1976-08-31 William Floyd Pike Injection apparatus and method with automatic aspiration feature
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US6824526B2 (en) 2001-10-22 2004-11-30 Penjet Corporation Engine and diffuser for use with a needle-less injector
US20050192530A1 (en) * 2001-04-13 2005-09-01 Penjet Corporation Method and apparatus for needle-less injection with a degassed fluid
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US20090012482A1 (en) * 2007-03-14 2009-01-08 Pinto Moshe Devices and methods for application of reduced pressure therapy
US20090259203A1 (en) * 2007-10-11 2009-10-15 Dean Hu Closed incision negative pressure wound therapy device and methods of use
US20100042021A1 (en) * 2008-02-14 2010-02-18 Spiracur, Inc. Devices and methods for treatment of damaged tissue
US20100137775A1 (en) * 2008-11-25 2010-06-03 Spiracur Inc. Device for delivery of reduced pressure to body surfaces
US20100174250A1 (en) * 2009-01-07 2010-07-08 Spiracur Inc. Reduced pressure therapy of the sacral region
US20100228205A1 (en) * 2009-03-04 2010-09-09 Spiracur Inc. Devices and methods to apply alternating level of reduced pressure to tissue
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US20110015594A1 (en) * 2009-04-10 2011-01-20 Dean Hu Methods and Devices for Applying Closed Incision Negative Pressure Wound Therapy
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US3797487A (en) * 1970-10-29 1974-03-19 Woelm Fa M Hypodermic syringe with clutch for aspiration
US3878846A (en) * 1971-12-13 1975-04-22 Spad Lab Hypodermic syringe with parts disposable after use
US3809298A (en) * 1973-07-18 1974-05-07 Precision Sampling Corp Syringe
US3990446A (en) * 1975-02-18 1976-11-09 Jewel Dean Randolph Taylor Hypodermic syringe for stabilized aspiration by one hand
US3977402A (en) * 1975-03-25 1976-08-31 William Floyd Pike Injection apparatus and method with automatic aspiration feature
US4216771A (en) * 1976-12-14 1980-08-12 Sven Arlers Hypodermic syringe with aspiration effect
US4333457A (en) * 1981-02-09 1982-06-08 Sterling Drug Inc. Self-aspirating syringe with frictionally engaged locking collet
US4333456A (en) * 1981-02-09 1982-06-08 Sterling Drug Inc. Self-aspirating hypodermic syringe and self-aspirating assembly therefor
US4381779A (en) * 1981-07-16 1983-05-03 Sterling Drug Inc. Deformable slidable piston to provide self-aspiration in hypodermic cartridge ampoules
US4407283A (en) * 1981-10-19 1983-10-04 Dale C. Grier Self-injecting syringe
EP0109913A3 (en) * 1982-11-03 1984-09-12 Micro-Mega Dental syringe for intra-ligament injections
US4540405A (en) * 1983-07-12 1985-09-10 Cilco, Inc. Disposable syringe sleeve
EP0160711A1 (en) * 1984-05-03 1985-11-13 Bünder Glas GmbH Injection syringe
US4883472A (en) * 1985-11-08 1989-11-28 Disetronic Ag. Injection device
US4744791A (en) * 1986-12-18 1988-05-17 Georges Egolf Syringe with automatic piston retraction
US5232457A (en) * 1991-08-05 1993-08-03 Grim John P Medical syringe
US5505704A (en) * 1993-04-02 1996-04-09 Eli Lilly And Company Manifold medication injection apparatus and method
US5584815A (en) * 1993-04-02 1996-12-17 Eli Lilly And Company Multi-cartridge medication injection device
US5989226A (en) * 1993-11-13 1999-11-23 Seldoren Limited Syringe with detachable drug housing
US5593390A (en) * 1994-03-09 1997-01-14 Visionary Medical Products, Inc. Medication delivery device with a microprocessor and characteristic monitor
US5728074A (en) * 1994-03-09 1998-03-17 Visionary Medical Products, Inc. Pen-type injector with a microprocessor and blood characteristic monitor
US5536249A (en) * 1994-03-09 1996-07-16 Visionary Medical Products, Inc. Pen-type injector with a microprocessor and blood characteristic monitor
US5925021A (en) * 1994-03-09 1999-07-20 Visionary Medical Products, Inc. Medication delivery device with a microprocessor and characteristic monitor
US5820602A (en) * 1995-09-08 1998-10-13 Visionary Medical Products, Inc. Pen-type injector drive mechanism
WO1997040875A3 (en) * 1996-05-01 1998-03-19 Stan Janus Improved drug injection system with self-aspiration feature
WO1997040875A2 (en) 1996-05-01 1997-11-06 Stan Janus Improved drug injection system with self-aspiration feature
US6158862A (en) * 1997-12-04 2000-12-12 Alcon Laboratories, Inc. Method of reducing glare associated with multifocal ophthalmic lenses
US5876379A (en) * 1998-01-22 1999-03-02 Alcon Laboratories, Inc. Syringe cannula holder
US5925032A (en) * 1998-02-17 1999-07-20 Alcon Laboratories, Inc. Syringe cannula holder
US20100312191A1 (en) * 1998-06-10 2010-12-09 Georgia Tech Research Corporation Microneedle Devices and Methods of Manufacture and Use Thereof
US8708966B2 (en) 1998-06-10 2014-04-29 Georgia Tech Research Corporation Microneedle devices and methods of manufacture and use thereof
US6086569A (en) * 1999-05-04 2000-07-11 Schweizer; Kenneth M. Hypodermic syringe
US8257324B2 (en) * 1999-06-04 2012-09-04 Georgia Tech Research Corporation Microneedle drug delivery device
US20070225676A1 (en) * 1999-06-04 2007-09-27 Prausnitz Mark R Microneedle drug delivery device
WO2001085237A2 (en) 2000-05-11 2001-11-15 Safety Syringes, Inc. Aspirating dental syringe with needle shield
US6416323B1 (en) 2000-05-11 2002-07-09 Safety Syringes, Inc. Aspirating dental syringe with needle shield
US20030187406A1 (en) * 2000-06-15 2003-10-02 Spofforth Leonard Morris Hypodermic syringe with passive aspiration feature
US8100865B2 (en) * 2000-06-15 2012-01-24 Hambley Limited Hypodermic syringe with passive aspiration feature
US20020082543A1 (en) * 2000-12-14 2002-06-27 Jung-Hwan Park Microneedle devices and production thereof
US9302903B2 (en) 2000-12-14 2016-04-05 Georgia Tech Research Corporation Microneedle devices and production thereof
US6500239B2 (en) 2001-03-14 2002-12-31 Penjet Corporation System and method for removing dissolved gas from a solution
US20050192530A1 (en) * 2001-04-13 2005-09-01 Penjet Corporation Method and apparatus for needle-less injection with a degassed fluid
US6613011B2 (en) 2001-04-13 2003-09-02 Penjet Corporation Gas-pressured engine with valve
US6613010B2 (en) 2001-04-13 2003-09-02 Penjet Corporation Modular gas-pressured needle-less injector
US6755220B2 (en) 2001-04-27 2004-06-29 Penjet Corporation Method and apparatus for filling or refilling a needle-less injector
US6824526B2 (en) 2001-10-22 2004-11-30 Penjet Corporation Engine and diffuser for use with a needle-less injector
US7018356B2 (en) 2002-10-31 2006-03-28 Wise Roger R Method and apparatus for adjusting the contents of a needle-less injector
US20050288625A1 (en) * 2004-06-25 2005-12-29 Rossback Richard A Syringe pressure applicator
US7601140B2 (en) 2004-06-25 2009-10-13 Alcon, Inc. Syringe pressure applicator
US8372044B2 (en) 2005-05-20 2013-02-12 Safety Syringes, Inc. Syringe with needle guard injection device
US20090012482A1 (en) * 2007-03-14 2009-01-08 Pinto Moshe Devices and methods for application of reduced pressure therapy
US8007491B2 (en) 2007-03-14 2011-08-30 The Board Of Trustees Of The Leland Stanford Junior University Methods for application of reduced pressure therapy
US8529532B2 (en) 2007-03-14 2013-09-10 The Board Of Trustees Of The Leland Stanford Junior University Reduced pressure therapy devices
US20090076467A1 (en) * 2007-03-14 2009-03-19 Pinto Moshe Methods for application of reduced pressure therapy
US9421133B2 (en) 2007-10-11 2016-08-23 Kci Licensing, Inc. Closed incision negative pressure wound therapy device and methods of use
US20090259203A1 (en) * 2007-10-11 2009-10-15 Dean Hu Closed incision negative pressure wound therapy device and methods of use
US8834434B2 (en) 2007-10-11 2014-09-16 Spiracur Inc. Closed incision negative pressure wound therapy device and methods of use
US8562576B2 (en) 2007-10-11 2013-10-22 Spiracur, Inc. Closed incision negative pressure wound therapy device and methods of use
US8435221B2 (en) 2007-10-11 2013-05-07 Spiracur, Inc. Closed incision negative pressure wound therapy device and methods of use
US8246590B2 (en) 2007-10-11 2012-08-21 Spiracur, Inc. Closed incision negative pressure wound therapy device and methods of use
US20110105963A1 (en) * 2007-10-11 2011-05-05 Spiracur, Inc. Closed incision negative pressure wound therapy device and methods of use
US8128607B2 (en) 2008-02-14 2012-03-06 Spiracur Inc. Devices and methods for treatment of damaged tissue
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US8177764B2 (en) 2008-02-14 2012-05-15 Spiracur Inc. Devices and methods for treatment of damaged tissue
US20100198174A1 (en) * 2008-02-14 2010-08-05 Spiracur, Inc. Devices and methods for treatment of damaged tissue
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US8337474B2 (en) 2008-02-14 2012-12-25 Spiracur Inc. Devices and methods for treatment of damaged tissue
US20100198173A1 (en) * 2008-02-14 2010-08-05 Spiracur, Inc. Devices and methods for treatment of damaged tissue
US8926575B2 (en) 2008-02-14 2015-01-06 Spiracur Inc. Devices and methods for treatment of damaged tissue
US8961481B2 (en) 2008-02-14 2015-02-24 Spiracur Inc. Devices and methods for treatment of damaged tissue
US20100042021A1 (en) * 2008-02-14 2010-02-18 Spiracur, Inc. Devices and methods for treatment of damaged tissue
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US20100137775A1 (en) * 2008-11-25 2010-06-03 Spiracur Inc. Device for delivery of reduced pressure to body surfaces
US9259358B2 (en) 2009-01-07 2016-02-16 Kci Licensing, Inc. Reduced pressure therapy of the sacral region
US8361043B2 (en) 2009-01-07 2013-01-29 Spiracur Inc. Reduced pressure therapy of the sacral region
US20100174250A1 (en) * 2009-01-07 2010-07-08 Spiracur Inc. Reduced pressure therapy of the sacral region
US8728045B2 (en) 2009-03-04 2014-05-20 Spiracur Inc. Devices and methods to apply alternating level of reduced pressure to tissue
US20100228205A1 (en) * 2009-03-04 2010-09-09 Spiracur Inc. Devices and methods to apply alternating level of reduced pressure to tissue
US8444614B2 (en) 2009-04-10 2013-05-21 Spiracur, Inc. Methods and devices for applying closed incision negative pressure wound therapy
US8398604B2 (en) 2009-04-10 2013-03-19 Spiracur, Inc. Methods and devices for applying closed incision negative pressure wound therapy
US20110106026A1 (en) * 2009-04-10 2011-05-05 Kenneth Wu Methods and devices for applying closed incision negative pressure wound therapy
US8409159B2 (en) 2009-04-10 2013-04-02 Spiracur, Inc. Methods and devices for applying closed incision negative pressure wound therapy
US20110015594A1 (en) * 2009-04-10 2011-01-20 Dean Hu Methods and Devices for Applying Closed Incision Negative Pressure Wound Therapy
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Also Published As

Publication number Publication date Type
FR2017285A1 (en) 1970-05-22 application
GB1252306A (en) 1971-11-03 application
NL6913362A (en) 1970-03-05 application
BE738268A (en) 1970-02-16 grant
CA873458A (en) 1971-06-15 grant

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