US3910273A - Aspirating hypodermic syringe - Google Patents

Aspirating hypodermic syringe Download PDF

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Publication number
US3910273A
US3910273A US448746A US44874674A US3910273A US 3910273 A US3910273 A US 3910273A US 448746 A US448746 A US 448746A US 44874674 A US44874674 A US 44874674A US 3910273 A US3910273 A US 3910273A
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US
United States
Prior art keywords
ampoule
piston rod
plunger
operating device
syringe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US448746A
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English (en)
Inventor
Sven Arlers
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Individual
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Individual
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Publication date
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Publication of US3910273A publication Critical patent/US3910273A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3148—Means for causing or aiding aspiration or plunger retraction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod

Definitions

  • syringes of the type intended for cooperation with a cylindrical ampoule having a displaceable plunger for closing one of its ends whereas the other end is closed by a diaphragm it is further important to prevent the diaphragm and plunger from being damaged during injection so that air may enter into the ampoule.
  • a syringe meeting these demands is provided in that a sleeve-shaped piston rod is adapted to be governed by the internal wall of the ampoule, the rod being fitted to an operating member which, however, is axially displaceable in relation to the rod and connectable directly to the plunger by means of a connecting device extending through the piston rod.
  • the operating member is designed as a two-part plate, one part of which against projections in the piston rod and intended via the connecting device to bring about the required motion of the plunger for effecting aspiration.
  • the present invention refers to a hypodermic syringe of the type intended for cooperation with a cylindrical ampoule having a displaceable plunger which is connectable to a piston rod and intended for closing one of its ends.
  • the plunger of certain types of known cylindrical ampoules is designed in such a manner that it forces a diaphragm inwards, when acted upon by a piston rod, so a limited quantity of fluid is expelled.
  • the diaphragm returns to its original position, sucking fluid back into the ampoule.
  • a disadvantage with syringes of known type is that it is necessary to inject some of the anaesthetic, or the like, in order to bring about the desired aspiration.
  • a further objective is to obtain a way to better determine the quantity of fluid aspiration than has been possible with earlier types of syringes where the aspiration occurs automatically when the pressure upon the piston rod is removed.
  • the aim of the present invention is to eliminate the disadvantages of the known syringe, and to propose a syringe of simple design, which is cheap to manufacture, handy to use and where further the aspiration and the injection may be performed without changing the grip upon the unit.
  • the piston rod is sleeve shaped and adapted to be governed by the cylindrical, internal wall of the ampoule, at its end remote from the ampoule said piston rod being attached to an operating member axially displaceable with respect to the piston rod, said member having a connecting device extending through the piston rod and adapted for connection to the plunger, and further being designed as a two-part plate, one part being hingedly connected to the other fixed part, the design being such that in a position where the said operating member and the said plunger are interconnected, the first mentioned part is engaging against projections at the piston rod, the said first mentioned part thereby forming an angle relative to the said fixed part.
  • FIG. 1 is a perspective view of a syringe according to the invention
  • FIG. 2 is a section through the syringe according to FIG. 1,
  • FIG. 3 is a section perpendicularly to the section in FIG. 1,
  • FIG. 4 is a section similar to that of FIG. 3, but with the operating device in its inward position,
  • FIG. 5 shows a section similar to that of FIG. 2, but with the operating device in its aspiration position
  • FIG. 6 shows a perspective view of the piston rod of the injection device
  • FIG. 7 shows a perspective view of a clamping device formed as a spring
  • FIG. 8 shows a section, similar to that of FIG. 4, through a modified embodiment of the syringe.
  • the hypodermic syringe shown in the drawings includes a cylindrical ampoule 1, manufactured for instance of glass, one end of which being closed by a rubber diaphragm 2. This is retained at the ampoule by means of a sleeve 3, which is designed in such a manner that a fitting 4 for a needle may be snapped in place thereon, or be attached thereto in any other suitable manner.
  • the opposite end of the ampoule is closed by a plunger 5, preferably made of rubber and provided with a centrally located spigot 6, which extends right through the plunger and reaches a distance outside the latter, at the face thereof remote from the ampoule.
  • the spigot 6 is connected to the plunger by means of a diaphragm, and is designed to be connected to a connecting device 7 at a piston rod 8.
  • This is formed as a cylindrical sleeve having substantially the same external diameter as the internal diameter of the ampoule.
  • the piston rod will thus be guided by the ampoule during the injection.
  • the piston rod is at its back end provided with two diametrically located grooves 9 serving as guides for radially located clamping means 11, fitted internally at a cap-formed operating device 10.
  • the clamping means 11 is designed in such a manner that it, during the axial displacement of the operating device 10 along the piston rod 8, will cooperate with the connecting device 7.
  • This includes a U-shaped spring, between the open shanks of which the spigot 6 at plunger 5 will be gripped, when the piston rod is pushed into the cylinder ampoule.
  • the spring 7 is mounted on a peg 12, which preferably is made integral with the spring. The ends of the peg 12, extending outside the spring, rest in diametrically located grooves 13 in the piston rod 8.
  • the clamping means 11 will force the shanks of the spring 7 towards each other, and as the spigot 6 has entered into the space between the shanks the latter will grip the spigot.
  • the clamping means 11 is designed in such a manner that it may snap into mating recesses 14 at the spring, when the plunger is connected to the spring, whereby the latter will be brought along when the operating device 10 is displaced axially.
  • An end plate at the operating device 10 is divided in two parts, of which a bigger one 15 is rigidly connected to the operating device 10, whereas the other part 16 is hingedly connected to the first one.
  • the hinge connecting the parts may preferably consist of a thin bridge between the two parts.
  • the end of piston rod 8, remote from the ampoule is provided with two pointed projections 18 located opposite to the moveable plate part 16 and at some distance from the hinge 17. As is shown in FIG. 4 the plate part 16 will be swung outwards by means of these projections 18, when the operating device 10 is forced to its inward position, in which spring 7 is connected to the spigot 6 at the plunger. If plate part 16 is forced down it will, in cooperation with projections 18, act as a lever, whereby the operating device and the connecting device 7, as well as the spigot 6 at plunger will be lifted somewhat.
  • the syringe according to the invention will operate in the following manner.
  • a cylindrical ampoule l is connected to the piston rod unit 8, l0 and the operating device 10 thereof is forced to its inner position, whereby a plunger 5, 6 is connected to the device 7. Thereafter the needle is fitted by the fixture thereof being snapped upon the sleeve 3. Possible gas or air in the ampoule is removed in the usual manner by a small quantity of fluid being ejected from the ampoule, turned with its needle upwards. The syringe is now ready for use, and plate part 16 rests in the position shown in FIG. 4.
  • the aspiration may be repeated several times.
  • the connection between plunger 5 and the operating device is obtained by means of a rod 19 connected to a plate 15.
  • This rod at its end remote from the plate is formed to snap into a mating recess in plunger 5.
  • rod 19 is provided with an element 21.
  • the operating device according to FIG. 8 is formed to enter the piston rod 8.
  • the operating device is provided with external keys cooperating with grooves 23 in the piston rod, whereby an angular movement of the operating device with respect to the piston rod is prevented.
  • the invention is not limited to the embodiments shown and described, but may be varied in several ways within the scope of the claims.
  • the cylinder ampoule may for instance be fitted into a housing, at which the needle is mounted.
  • a hypodermic syringe of the type cooperating with a cylindrical ampoule and provided with means for performing aspiration prior to injection having a displaceable plunger connected to a piston rod and closing one end of said ampoule, said plunger being provided with an axial spigot extending from the end surface of the plunger proximate said ampoule and projecting endwise beyond the end surface of the plunger remote from the ampoule, said piston rod being sleeveshaped and telescoped within the cylindrical internal wall of the ampoule, said ampoule having a hollow needle extending from the other end thereof, the improvement wherein said piston rod at its end remote from the ampoule engages an operating device axially sliding against the outer surface of said piston rod, said operating device being connected to clamping means extending through slits in said piston rod towards the inside and engaging with said plunger over a connecting device attached to said piston rod, said connecting device extending through said piston rod and having means engaging with said axial spigot on movement of said operating device toward said ampoule,
  • said connecting device includes a U-shaped spring adapted to grip said spigot by way of the ends of its shanks, said spring further being adapted to cooperate with said clamping means of said operating device, said means being intended to force the shanks of the spring around the plunger when the operating device has been brought toward said ampoule.

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US448746A 1973-03-08 1974-03-06 Aspirating hypodermic syringe Expired - Lifetime US3910273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7303235A SE380975B (sv) 1973-03-08 1973-03-08 Injektionsspruta

Publications (1)

Publication Number Publication Date
US3910273A true US3910273A (en) 1975-10-07

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ID=20316841

Family Applications (1)

Application Number Title Priority Date Filing Date
US448746A Expired - Lifetime US3910273A (en) 1973-03-08 1974-03-06 Aspirating hypodermic syringe

Country Status (4)

Country Link
US (1) US3910273A (ja)
JP (1) JPS57825B2 (ja)
DE (1) DE2410910A1 (ja)
SE (1) SE380975B (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448206A (en) * 1981-08-17 1984-05-15 Martell Michael D Vented, aspirating syringe
US4465476A (en) * 1981-12-22 1984-08-14 Contraves Ag Injection syringe for injecting two liquids
US20030187406A1 (en) * 2000-06-15 2003-10-02 Spofforth Leonard Morris Hypodermic syringe with passive aspiration feature
DE202005006026U1 (de) * 2005-04-14 2006-08-24 Transcoject Gesellschaft für medizinische Geräte mbH & Co. KG Injektionsspritze für medizinische Zwecke
US7563265B1 (en) * 1999-09-02 2009-07-21 Murphy Kieran P J Apparatus for strengthening vertebral bodies
US20120310203A1 (en) * 2010-01-19 2012-12-06 Cambridge Enterprise Limited Apparatus and method
US9067023B2 (en) 2011-11-21 2015-06-30 University Of Louisville Research Foundation, Inc. Ergonomic syringe and adaptor
US20170246087A1 (en) * 2016-02-25 2017-08-31 Neomed, Inc. Syringe plunger with hinged flange
USD886987S1 (en) * 2018-12-21 2020-06-09 Henkel IP & Holding GmbH Syringe dispensing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340872A (en) * 1964-11-24 1967-09-12 Thomas S Cox Hypodermic syringe with distendable piston
US3348545A (en) * 1964-10-22 1967-10-24 Sarnoff Latched cartridge
US3543755A (en) * 1967-11-09 1970-12-01 John Delbert Kessel Ampule for hypodermic syringes
US3705582A (en) * 1969-09-23 1972-12-12 Marvin D Stumpf Breech loaded syringe and method of breech loading same
US3797487A (en) * 1970-10-29 1974-03-19 Woelm Fa M Hypodermic syringe with clutch for aspiration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348545A (en) * 1964-10-22 1967-10-24 Sarnoff Latched cartridge
US3340872A (en) * 1964-11-24 1967-09-12 Thomas S Cox Hypodermic syringe with distendable piston
US3543755A (en) * 1967-11-09 1970-12-01 John Delbert Kessel Ampule for hypodermic syringes
US3705582A (en) * 1969-09-23 1972-12-12 Marvin D Stumpf Breech loaded syringe and method of breech loading same
US3797487A (en) * 1970-10-29 1974-03-19 Woelm Fa M Hypodermic syringe with clutch for aspiration

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448206A (en) * 1981-08-17 1984-05-15 Martell Michael D Vented, aspirating syringe
US4465476A (en) * 1981-12-22 1984-08-14 Contraves Ag Injection syringe for injecting two liquids
US7563265B1 (en) * 1999-09-02 2009-07-21 Murphy Kieran P J Apparatus for strengthening vertebral bodies
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
DE202005006026U1 (de) * 2005-04-14 2006-08-24 Transcoject Gesellschaft für medizinische Geräte mbH & Co. KG Injektionsspritze für medizinische Zwecke
US20120310203A1 (en) * 2010-01-19 2012-12-06 Cambridge Enterprise Limited Apparatus and method
US9067023B2 (en) 2011-11-21 2015-06-30 University Of Louisville Research Foundation, Inc. Ergonomic syringe and adaptor
US20170246087A1 (en) * 2016-02-25 2017-08-31 Neomed, Inc. Syringe plunger with hinged flange
US10722432B2 (en) * 2016-02-25 2020-07-28 Neomed, Inc. Syringe plunger with hinged flange
US11925791B2 (en) 2016-02-25 2024-03-12 Avent, Inc. Syringe plunger with hinged flange
USD886987S1 (en) * 2018-12-21 2020-06-09 Henkel IP & Holding GmbH Syringe dispensing device

Also Published As

Publication number Publication date
JPS5041373A (ja) 1975-04-15
JPS57825B2 (ja) 1982-01-08
DE2410910A1 (de) 1974-09-19
SE380975B (sv) 1975-11-24

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