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US3598120A - Syringe having limited plunger movement - Google Patents

Syringe having limited plunger movement Download PDF

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Publication number
US3598120A
US3598120A US41750A US3598120DA US3598120A US 3598120 A US3598120 A US 3598120A US 41750 A US41750 A US 41750A US 3598120D A US3598120D A US 3598120DA US 3598120 A US3598120 A US 3598120A
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Prior art keywords
plunger
barrel
axis
rearward
syringe
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US41750A
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Morris Mass
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Haematronics Inc
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Haematronics Inc
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    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
    • 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
    • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
    • A61M5/3158—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by axially moving actuator operated by user, e.g. an injection button

Definitions

  • the present invention includes a syringe having a plunger movably mounted in a hollow barrel for reciprocal movement therein in directions along its axis.
  • a flexible elongated member has a maximum length when stretched taut and has one end alfixed to the barrel and an opposite end affixed to the plunger in a manner whereby when the plunger is moved a determined distance in a predetermined direction the flexible member is stretched taut and limits further movement of the plunger in the predetermined direction.
  • a cooperating guide device of the barrel and plunger guides the plunger in a manner which prevents it from rotation about its axis.
  • the present invention relates to a syringe having limited plunger movement. More particularly, the invention relates to a disposable syringe for charging and discharging a constant volume of fluid.
  • a principal object of the present invention is to provide a new and improved syringe.
  • the syringe of the present invention has a limited plunger movement which provides charging and discharging of a constant volume of fluid.
  • the syringe of the present invention is disposable.
  • the syringe of the present invention automatically provides and indicates the charging and discharging of a constant volume of fluid without continuous supervision of the user.
  • the syringe of the present invention has a plunger which is prevented from rotating about its axis.
  • the syringe of the present invention is of simple structure and is inexpensive to manufacture.
  • the syringe of the present invention is very easy to use and functions with efficiency, effectiveness, accuracy and reliability.
  • a syringe comprises a hollow barrel and a plunger, having an axis, movably mounted in the barrel for reciprocal movement therein in directions along its axis.
  • a flexible elongated member has a maximum length when stretched taut and has one end affixed to the barrel and an opposite end afi'lxed to the plunger in a manner whereby when the plunger is moved a determined distance in a predetermined direction the flexible member is stretched taut and limits further movement of the plunger in the predetermined direction.
  • the flexible member is a fiber or stringlike member.
  • the barrel has an axis, a forward end portion for accommodating a hypodermic needle, a rearward open end portion through which the plunger extends from the barrel and a middle portion between the forward and rearward end portions.
  • a flange extends from the barrel at the rearward end portion thereof substantially perpendicularly to the axis of the barrel.
  • the barrel includes a notch formed in the rearward end thereof and the plunger includes a key protrusion extending parallel to its axis and slidably seated in and guided by the notch in a manner whereby the plunger is prevented from rotating about its axis.
  • a handle extends from the plunger at the free end thereof substantially perpendicularly to the axis of the plunger.
  • One end of the flexible member is affixed to the flange and the opposite end of the flexible member is affixed to the handle.
  • FIG. I is a perspective view of an embodiment of the syringe of the present invention.
  • FIG. 2 is a side view ofthe embodiment of FIG. 1;
  • FIG. 3 is a partially fragmented rear view, taken along the lines III-III of FIG. 2;
  • FIG. 4 is a partially fragmented view, taken along the lines IV-IV of FIG. 3.
  • the syringe of the present invention comprises a hollow barrel 11 having an axis 12 (FIG. 2).
  • the barrel 11 has a forward end portion 13 for accommodating a hypodermic needle 14 (shown in broken lines in FIG. 1).
  • the forward end portion I3 includes a first conical portion 15.
  • the first conical portion 15 terminates in a second truncated hollow conical portion I6 which has an axis of symmetry coincident with the axis I4 of the barrel II.
  • the barrel II has a rearward'open endportion I6 having a protuberance I8 (FIGS. 3 and 4) extending toward the axis 14 of said barrel.
  • the protuberance I8 has a notch I9 (FIG. 3) formed therein.
  • the barrel 1] also has a middle portion 21 between the forward end portion I3 and the rearward end portion I7.
  • the middle portion 2I of the barrel II is integral with and communicates with the second conical portion 16.
  • a flange 22 extends from the barrel II at the rearward end portion 17 substantially perpendicularly to the axis 12 of said barrel.
  • the flange 22 may be integrally formed with the barrel 11.
  • the flange 22 has a substantially ovular surface 23 (FIGS. 2 and 4) coaxial with, but at a slight angle of inclination with a plane perpendicular to the axis 12 ofthe barrel 11.
  • a collar 24 extends substantially perpendicularly from the ovular surface 23 at the periphery 25 (FIGS. 1 and 3) thereof to provide a rearwardly opening recess 26 (FIGS. 2 and 4) with said ovular surface.
  • the ovular surface 23 has a hole 27 (FIG. 4) formed therethrough.
  • a plunger 28 has an axis 29 (FIG. 4) and is movably mounted in the barrel 11 for reciprocal movement therein in directions along said axis.
  • the plunger 28 extends from the barrel II at the rearward end portion 17 thereof.
  • the plunger 28 has a cross section of cross-shaped configuration (FIG. 3) comprising an elongated stem portion 30 of substantially narrow rectangular cross section and an elongated branch portion 31 of substantially narrow rectangular cross section.
  • the branch portion 31 of the plunger 28 intersects the stem portion 30 thereof at substantially right angles (FIG. 3) to provide a pair of arms of the same dimensions positioned one on each side of said stem portion in the manner of a cross.
  • the plunger 28 has a forward end 32 (FIG. 2) and a rearward end 33 (FIGS. 2 and 4).
  • a piston head 34 (FIG. 2) is removably mounted on the forward end 32 of the plunger 28.
  • the piston head 34 is resilient in radial directions from the axis 29 of the plunger 28 and is in frictional engagement with the inside surface of the barrel 11 in a manner whereby fluid in said barrel in the path of said piston head is forced by said piston head in the direction of movement of said piston head.
  • the stem portion 30 of the plunger 28 is slidably seated in and guided by the notch 19 (FIG. 3) in the rearward portion 17 of the barrel II in a manner whereby said plunger is prevented from rotation about its axis 29.
  • a substantially disclike handle 35 extends from the plunger 28 at the rearward end 33 thereof substantially perpendicularly to the axis 29 of said plunger.
  • the handle 35 may be integrally formed with the plunger 28.
  • the handle 35 is substantially symmetrical with the plunger 28.
  • the handle 35 has a hole 36 (FIG. 4) formed therethrough.
  • a flexible elongated stringlike member 37 has a maximum length when stretched taut and may comprise string of natural or artificial fiber, wire, plastic, or the like.
  • the flexible member 37 has one end 38 passing through the hole 27 formed through the surface 23 of the flange 22 and secured therein by any suitable means such as, for example, bonding, knotting, crimping, tying, cross pin, or the like.
  • the flexible member 37 has an opposite end 39 passing through the hole 36 formed through the handle 35 and secured therein by any suitable means such as, for example, bonding, knotting, crimping, tying, cross pin, or the like.
  • the flexible member 37 is in nontaut condition and does not affect the position of said plunger relative to said barrel.
  • the flexible member 37 is stretched taut and limits further movement of said plunger in the rearward direction. Since the determined distance is in accordance with the length, from end 38 to end 39, of the flexible member 37, said length may be varied to vary the limit of rearward movement of the plunger 28 thereby correspondingly limiting the volume of fluid charged and discharged by the syringe.
  • the volume of fluid charged and discharged by the syringe of the present invention is constant, due to the limiting of the rearward movement of the plunger 28 by the flexible member 37.
  • a syringe comprising a hollow barrel; a plunger having an axis movably mounted in said barrel for reciprocal movement therein in directions along its axis; and a flexible elongated member having a maximum length when stretched taut and having one end afflxed to said barrel and an opposite end affixed to said plunger in a manner whereby when said plunger is moved a determined distance in a predetermined direction said flexible member is stretched taut and limits further movement of said plunger in said predetermined direction, said barrel having an axis, a forward end portion for accommodating a hypodermic needle, a rearward open end portion through which said plunger extends from said barrel and a middle portion between said forward and rearward end portions, said barrel including a notch formed in the rearward end thereof and said plunger including a key protrusion extending parallel to its axis and slidably seated in and guided by said notch in a manner whereby said plunger is prevented from rotation about its axis.
  • a syringe comprising a hollow barrel having an axis, a forward end portion for accommodating a hypodermic needle, said forward end portion including a first conical portion terminating in a second truncated hollow conical portion having an axis of symmetry coincident with the axis of said barrel, a rearward open end portion having a protuberance extending toward said axis and a notch formed in said protuberance and a middle portion between said forward and rearward end poi" lions and integral with and communicating with said second conical portion; a flange extending from said barrel at the rearward end portion thereof substantially perpendicularly to the axis of said barrel, said flange having a substantially ovular surface coaxial with but at a slight angle of inclination with a plane perpendicular to the axis of said barrel and a collar extending substantially perpendicularly from said ovular surface at the periphery thereof to provide a rearwardly opening recess with said o
  • a syringe comprising a hollow barrel, a plunger mounted for reciprocal movement is said barrel along the longitudinal axis thereof, a flexible elongated member having a maximum length when stretched taut and having one end affixed to said barrel and an opposite end affixed to said plunger in a manner whereby when said plunger is moved a determined distance in a predetermined direction said flexible member is stretched taut and limits further movement of said plunger in said predetermined direction, a groove formed in the inner surface of said hollow barrel, a key on an exterior surface of said plunger slidably movable in said groove whereby said plunger is prevented from rotation about its longitudinal axis.

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  • 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)

Abstract

The present invention includes a syringe having a plunger movably mounted in a hollow barrel for reciprocal movement therein in directions along its axis. A flexible elongated member has a maximum length when stretched taut and has one end affixed to the barrel and an opposite end affixed to the plunger in a manner whereby when the plunger is moved a determined distance in a predetermined direction the flexible member is stretched taut and limits further movement of the plunger in the predetermined direction. A cooperating guide device of the barrel and plunger guides the plunger in a manner which prevents it from rotation about its axis.

Description

United States Patent [72] Inventor Morris Mm Kew Gardens, N.Y. [21] Appl. No. 41,750 [22] Filed June 2, 1970 [45] Patented Aug. 10, 1971 [73] Assignee Haemntronics, Inc.
New Rochelle, N.Y. Continuation of applimtion Ser. No. 680,172, Nov. 2, 1967, now abandoned.
[54] SYRINGE HAVING LIMITED PLUNGER MOVEMENT 6 Claims, 4 Drawing Figs.
[52] US. Cl. 128/218 PA, 128/234 [51] Int. Cl A6lm 5/22 [50] Field otSearch 128/215,
[56] References Cited UNITED STATES PATENTS 1,343,085 6/1920 Lerch 128/237 Primary Examiner-Dalton L. Truluck A tlorney Nolte and Nolte ABSTRACT: The present invention includes a syringe having a plunger movably mounted in a hollow barrel for reciprocal movement therein in directions along its axis. A flexible elongated member has a maximum length when stretched taut and has one end alfixed to the barrel and an opposite end affixed to the plunger in a manner whereby when the plunger is moved a determined distance in a predetermined direction the flexible member is stretched taut and limits further movement of the plunger in the predetermined direction. A cooperating guide device of the barrel and plunger guides the plunger in a manner which prevents it from rotation about its axis.
Pmmmmmomn 3598.120
INVENTCR Maze/s Mss ATTORNEYS SYRINGE HAVING LIMITED PLUNGER MOVEMENT This application is a continuation of Ser. No. 680,l 72 filed Nov. 2, I967, now abandoned.
The present invention relates to a syringe having limited plunger movement. More particularly, the invention relates to a disposable syringe for charging and discharging a constant volume of fluid.
A principal object of the present invention is to provide a new and improved syringe. The syringe of the present invention has a limited plunger movement which provides charging and discharging of a constant volume of fluid. The syringe of the present invention is disposable. The syringe of the present invention automatically provides and indicates the charging and discharging of a constant volume of fluid without continuous supervision of the user. The syringe of the present invention has a plunger which is prevented from rotating about its axis. The syringe of the present invention is of simple structure and is inexpensive to manufacture. The syringe of the present invention is very easy to use and functions with efficiency, effectiveness, accuracy and reliability.
In accordance with the present invention, a syringe comprises a hollow barrel and a plunger, having an axis, movably mounted in the barrel for reciprocal movement therein in directions along its axis. A flexible elongated member has a maximum length when stretched taut and has one end affixed to the barrel and an opposite end afi'lxed to the plunger in a manner whereby when the plunger is moved a determined distance in a predetermined direction the flexible member is stretched taut and limits further movement of the plunger in the predetermined direction.
The flexible member is a fiber or stringlike member. The barrel has an axis, a forward end portion for accommodating a hypodermic needle, a rearward open end portion through which the plunger extends from the barrel and a middle portion between the forward and rearward end portions. A flange extends from the barrel at the rearward end portion thereof substantially perpendicularly to the axis of the barrel. The barrel includes a notch formed in the rearward end thereof and the plunger includes a key protrusion extending parallel to its axis and slidably seated in and guided by the notch in a manner whereby the plunger is prevented from rotating about its axis.
A handle extends from the plunger at the free end thereof substantially perpendicularly to the axis of the plunger. One end of the flexible member is affixed to the flange and the opposite end of the flexible member is affixed to the handle.
In order that the present invention may be readily carried into effect, it will now be described with reference to the accompanying drawing, wherein similar components are identified by the same reference numerals.
FIG. I is a perspective view of an embodiment of the syringe of the present invention;
FIG. 2 is a side view ofthe embodiment of FIG. 1;
FIG. 3 is a partially fragmented rear view, taken along the lines III-III of FIG. 2; and
FIG. 4 is a partially fragmented view, taken along the lines IV-IV of FIG. 3.
The syringe of the present invention comprises a hollow barrel 11 having an axis 12 (FIG. 2). The barrel 11 has a forward end portion 13 for accommodating a hypodermic needle 14 (shown in broken lines in FIG. 1). The forward end portion I3 includes a first conical portion 15. The first conical portion 15 terminates in a second truncated hollow conical portion I6 which has an axis of symmetry coincident with the axis I4 of the barrel II.
The barrel II has a rearward'open endportion I6 having a protuberance I8 (FIGS. 3 and 4) extending toward the axis 14 of said barrel. The protuberance I8 has a notch I9 (FIG. 3) formed therein. The barrel 1] also has a middle portion 21 between the forward end portion I3 and the rearward end portion I7. The middle portion 2I of the barrel II is integral with and communicates with the second conical portion 16.
A flange 22 extends from the barrel II at the rearward end portion 17 substantially perpendicularly to the axis 12 of said barrel. The flange 22 may be integrally formed with the barrel 11. The flange 22 has a substantially ovular surface 23 (FIGS. 2 and 4) coaxial with, but at a slight angle of inclination with a plane perpendicular to the axis 12 ofthe barrel 11. A collar 24 (FIGS. 2 and 4) extends substantially perpendicularly from the ovular surface 23 at the periphery 25 (FIGS. 1 and 3) thereof to provide a rearwardly opening recess 26 (FIGS. 2 and 4) with said ovular surface. The ovular surface 23 has a hole 27 (FIG. 4) formed therethrough.
A plunger 28 has an axis 29 (FIG. 4) and is movably mounted in the barrel 11 for reciprocal movement therein in directions along said axis. The plunger 28 extends from the barrel II at the rearward end portion 17 thereof. The plunger 28 has a cross section of cross-shaped configuration (FIG. 3) comprising an elongated stem portion 30 of substantially narrow rectangular cross section and an elongated branch portion 31 of substantially narrow rectangular cross section.
The branch portion 31 of the plunger 28 intersects the stem portion 30 thereof at substantially right angles (FIG. 3) to provide a pair of arms of the same dimensions positioned one on each side of said stem portion in the manner of a cross. The plunger 28 has a forward end 32 (FIG. 2) and a rearward end 33 (FIGS. 2 and 4).
A piston head 34 (FIG. 2) is removably mounted on the forward end 32 of the plunger 28. The piston head 34 is resilient in radial directions from the axis 29 of the plunger 28 and is in frictional engagement with the inside surface of the barrel 11 in a manner whereby fluid in said barrel in the path of said piston head is forced by said piston head in the direction of movement of said piston head.
The stem portion 30 of the plunger 28 is slidably seated in and guided by the notch 19 (FIG. 3) in the rearward portion 17 of the barrel II in a manner whereby said plunger is prevented from rotation about its axis 29.
A substantially disclike handle 35 extends from the plunger 28 at the rearward end 33 thereof substantially perpendicularly to the axis 29 of said plunger. The handle 35 may be integrally formed with the plunger 28. The handle 35 is substantially symmetrical with the plunger 28. The handle 35 has a hole 36 (FIG. 4) formed therethrough.
A flexible elongated stringlike member 37 has a maximum length when stretched taut and may comprise string of natural or artificial fiber, wire, plastic, or the like. The flexible member 37 has one end 38 passing through the hole 27 formed through the surface 23 of the flange 22 and secured therein by any suitable means such as, for example, bonding, knotting, crimping, tying, cross pin, or the like. The flexible member 37 has an opposite end 39 passing through the hole 36 formed through the handle 35 and secured therein by any suitable means such as, for example, bonding, knotting, crimping, tying, cross pin, or the like.
As shown in FIG. 2, when the plunger 28 is in any intermediate position in the barrel II, the flexible member 37 is in nontaut condition and does not affect the position of said plunger relative to said barrel. When the plunger 28 is moved a determined distance in a rearward direction in the barrel 11, however, the flexible member 37 is stretched taut and limits further movement of said plunger in the rearward direction. Since the determined distance is in accordance with the length, from end 38 to end 39, of the flexible member 37, said length may be varied to vary the limit of rearward movement of the plunger 28 thereby correspondingly limiting the volume of fluid charged and discharged by the syringe. The volume of fluid charged and discharged by the syringe of the present invention is constant, due to the limiting of the rearward movement of the plunger 28 by the flexible member 37.
While the invention has been described .by means of a specific example and in a-specific embodiment, I do not wish to be limited thereto, for obvious modifications will occur to those skilled in the art without departing from the spirit and scope of the invention.
What I claim is:
l. A syringe comprising a hollow barrel; a plunger having an axis movably mounted in said barrel for reciprocal movement therein in directions along its axis; and a flexible elongated member having a maximum length when stretched taut and having one end afflxed to said barrel and an opposite end affixed to said plunger in a manner whereby when said plunger is moved a determined distance in a predetermined direction said flexible member is stretched taut and limits further movement of said plunger in said predetermined direction, said barrel having an axis, a forward end portion for accommodating a hypodermic needle, a rearward open end portion through which said plunger extends from said barrel and a middle portion between said forward and rearward end portions, said barrel including a notch formed in the rearward end thereof and said plunger including a key protrusion extending parallel to its axis and slidably seated in and guided by said notch in a manner whereby said plunger is prevented from rotation about its axis.
2. A syringe as claimed in claim 1, wherein said flexible member comprises a stringlike member.
3. A syringe as claimed in claim 1, further comprising a handle extending from said plunger at the free end thereof substantially perpendicularly to the axis of said plunger.
4. A syringe as claimed in claim 3, wherein said one end of said flexible member is affixed to said flange and said opposite end ofsaid flexible member is affixed to said handle.
5. A syringe comprising a hollow barrel having an axis, a forward end portion for accommodating a hypodermic needle, said forward end portion including a first conical portion terminating in a second truncated hollow conical portion having an axis of symmetry coincident with the axis of said barrel, a rearward open end portion having a protuberance extending toward said axis and a notch formed in said protuberance and a middle portion between said forward and rearward end poi" lions and integral with and communicating with said second conical portion; a flange extending from said barrel at the rearward end portion thereof substantially perpendicularly to the axis of said barrel, said flange having a substantially ovular surface coaxial with but at a slight angle of inclination with a plane perpendicular to the axis of said barrel and a collar extending substantially perpendicularly from said ovular surface at the periphery thereof to provide a rearwardly opening recess with said ovular surface, the ovular surface of said flange having a hole formed therethrough; a plunger having an axis movably mounted in said barrel for reciprocal movement therein in directions along its axis and extending from said barrel at the rearward end portion thereof, said plunger having a cross section of cross-shaped configuration comprising an elongated stem portion of substantially narrow rectangular cross section and an elongated branch portion of substantially narrow rectangular cross section intersecting said stem portion at substantially right angles to provide a pair of arms of the same dimensions positioned one on each side of said stem portion in the manner of a cross, said plunger having a forward end and a-rearward end, a piston head removably mounted on the forward end of said plunger and being resilient in radial directions from the axis of said plunger, said piston head being in frictional engagement with the inside surface of said barrel in a manner whereby fluid in said barrel in the path of said piston head is forced by said piston head in the direction of movement of said piston head, the stem portion of said plunger being slidably seated in and guided by the notch in the rearward portion of said barrel in a manner whereby said plunger is prevented from rotation about its axis; a substantially disclike handle extending from said plunger at the rearward end thereof substantially perpendicularly to the axis of said plunger, said handle being substantially symmetrical with said plunger and having a hole formed therethrough; and a flexible elongated member having a maximum length when stretched taut and having one end passing through the hole formed through the surface of said flange and secured therein and an opposite end passing through the hole formed through said handle and secured therein whereby when said plunger is moved a determined distance in a rearward direction said flexrble member is stretched taut and limits further movement of said plunger in said rearward direction.
6. A syringe comprising a hollow barrel, a plunger mounted for reciprocal movement is said barrel along the longitudinal axis thereof, a flexible elongated member having a maximum length when stretched taut and having one end affixed to said barrel and an opposite end affixed to said plunger in a manner whereby when said plunger is moved a determined distance in a predetermined direction said flexible member is stretched taut and limits further movement of said plunger in said predetermined direction, a groove formed in the inner surface of said hollow barrel, a key on an exterior surface of said plunger slidably movable in said groove whereby said plunger is prevented from rotation about its longitudinal axis.

Claims (6)

1. A syringe comprising a hollow barrel; a plunger having an axis movably mounted in said barrel for reciprocal movement therein in directions along its axis; and a flexible elongated member having a maximum length when stretched taut and having one end affixed to said barrel and an opposite end affixed to said plunger in a manner whereby when said plunger is moved a determined distance in a predetermined direction said flexible member is stretched taut and limits further movement of said plunger in said predetermined direction, said barrel having an axis, a forward end portion for accommodating a hypodermic needle, a rearward open end portion through which said plunger extends from said barrel and a middle portion between said forward and rearward end portions, said barrel including a notch formed in the rearward end thereof and said plunger including a key protrusion extending parallel to its axis and slidably seated in and guided by said notch in a manner whereby said plunger is prevented from rotation about its axis.
2. A syringe as claimed in claim 1, wherein said flexible member comprises a stringlike member.
3. A syringe as claimed in claim 1, further comprising a handle extending from said plunger at the free end thereof substantially perpendicularly to the axis of said plunger.
4. A syringe as claimed in claim 3, wherein said one end of said flexible member is affixed to said flange and said opposite end of said flexible member is affixed to said handle.
5. A syringe comprising a hollow barrel having an axis, a forward end portion for accommodating a hypodermic needle, said forward end portion including a first conical portion terminating in a second truncated hollow conical portion having an axis of symmetry coincident with the axis of said barrel, a rearward open end portion having a protuberance extending toward said axis and a notch formed in said protuberance and a middle portion between said forward and rearward end portions and integral with and communicating with said second conical portion; a flange extending from said barrel at the rearward end portion thereof substantially perpendicularly to the axis of said barrel, said flange having a substantially ovular surface coaxial with but at a slight angle of inclination with a plane perpendicular to the axis of said barrel and a collar extending substantially perpendicularly from said ovular surface at the periphery thereof to provide a rearwardly opening recess with said ovular suRface, the ovular surface of said flange having a hole formed therethrough; a plunger having an axis movably mounted in said barrel for reciprocal movement therein in directions along its axis and extending from said barrel at the rearward end portion thereof, said plunger having a cross section of cross-shaped configuration comprising an elongated stem portion of substantially narrow rectangular cross section and an elongated branch portion of substantially narrow rectangular cross section intersecting said stem portion at substantially right angles to provide a pair of arms of the same dimensions positioned one on each side of said stem portion in the manner of a cross, said plunger having a forward end and a rearward end, a piston head removably mounted on the forward end of said plunger and being resilient in radial directions from the axis of said plunger, said piston head being in frictional engagement with the inside surface of said barrel in a manner whereby fluid in said barrel in the path of said piston head is forced by said piston head in the direction of movement of said piston head, the stem portion of said plunger being slidably seated in and guided by the notch in the rearward portion of said barrel in a manner whereby said plunger is prevented from rotation about its axis; a substantially disclike handle extending from said plunger at the rearward end thereof substantially perpendicularly to the axis of said plunger, said handle being substantially symmetrical with said plunger and having a hole formed therethrough; and a flexible elongated member having a maximum length when stretched taut and having one end passing through the hole formed through the surface of said flange and secured therein and an opposite end passing through the hole formed through said handle and secured therein whereby when said plunger is moved a determined distance in a rearward direction said flexible member is stretched taut and limits further movement of said plunger in said rearward direction.
6. A syringe comprising a hollow barrel, a plunger mounted for reciprocal movement in said barrel along the longitudinal axis thereof, a flexible elongated member having a maximum length when stretched taut and having one end affixed to said barrel and an opposite end affixed to said plunger in a manner whereby when said plunger is moved a determined distance in a predetermined direction said flexible member is stretched taut and limits further movement of said plunger in said predetermined direction, a groove formed in the inner surface of said hollow barrel, a key on an exterior surface of said plunger slidably movable in said groove whereby said plunger is prevented from rotation about its longitudinal axis.
US41750A 1970-06-02 1970-06-02 Syringe having limited plunger movement Expired - Lifetime US3598120A (en)

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Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881484A (en) * 1973-07-05 1975-05-06 Jr Charles F Gidcumb Mixing syringe having a rotationally restrained piston rod
US4018223A (en) * 1974-12-09 1977-04-19 Andros Incorporated Dosage control device
US4589870A (en) * 1984-02-21 1986-05-20 Indicon, Inc. Incremental actuator for syringe
US4715854A (en) * 1986-07-17 1987-12-29 Vaillancourt Vincent L Multidose disposable syringe and method of filling same
US4813937A (en) * 1986-05-07 1989-03-21 Vaillancourt Vincent L Ambulatory disposable infusion delivery system
US5135507A (en) * 1990-05-10 1992-08-04 Habley Medical Technology Corporation One-piece syringe
US5524576A (en) * 1994-10-31 1996-06-11 Walther; Dale D. Animal oral feeding/injecting device
US6652493B1 (en) 2000-07-05 2003-11-25 Animas Corporation Infusion pump syringe
DE102005037962A1 (en) * 2005-08-11 2007-02-15 Arzneimittel Gmbh Apotheker Vetter & Co. Ravensburg syringe
US20070106226A1 (en) * 2005-11-09 2007-05-10 Croll Perry W Syringe with internal sleeve
US20070156098A1 (en) * 2003-02-27 2007-07-05 B. Braun Melsungen Ag Safety syringes
US9956384B2 (en) 2014-01-24 2018-05-01 Cook Medical Technologies Llc Articulating balloon catheter and method for using the same
US10166343B1 (en) 2015-03-13 2019-01-01 Timothy Brandon Hunt Noise evident tamper cap
US10166347B1 (en) 2014-07-18 2019-01-01 Patrick Vitello Closure assembly for a medical device
US10183129B1 (en) 2010-12-03 2019-01-22 Medical Device Engineering, Llc Tamper indicating closure assembly
US10207099B1 (en) 2014-02-21 2019-02-19 Patrick Vitello Closure assembly for medical fitting
US10300263B1 (en) 2015-02-27 2019-05-28 Timothy Brandon Hunt Closure assembly for a medical connector
US10307548B1 (en) 2016-12-14 2019-06-04 Timothy Brandon Hunt Tracking system and method for medical devices
US10315024B1 (en) 2015-03-19 2019-06-11 Patick Vitello Torque limiting closure assembly
US10398844B2 (en) 2012-11-02 2019-09-03 Cook Medical Technologies Llc Controlled injection devices, systems, and methods
US10758684B1 (en) 2017-03-03 2020-09-01 Jonathan J. Vitello Tamper evident assembly
USD903865S1 (en) 2018-11-19 2020-12-01 International Medical Industries, Inc. Self-righting tip cap
US10888672B1 (en) 2017-04-06 2021-01-12 International Medical Industries, Inc. Tamper evident closure assembly for a medical device
US10898659B1 (en) 2017-05-19 2021-01-26 International Medical Industries Inc. System for handling and dispensing a plurality of products
US10912898B1 (en) 2014-02-03 2021-02-09 Medical Device Engineering Llc Tamper evident cap for medical fitting
US10933202B1 (en) 2017-05-19 2021-03-02 International Medical Industries Inc. Indicator member of low strength resistance for a tamper evident closure
US10953162B1 (en) 2016-12-28 2021-03-23 Timothy Brandon Hunt Tamper evident closure assembly
US11040149B1 (en) 2017-03-30 2021-06-22 International Medical Industries Tamper evident closure assembly for a medical device
US11097071B1 (en) 2016-12-14 2021-08-24 International Medical Industries Inc. Tamper evident assembly
US11278681B1 (en) 2018-02-20 2022-03-22 Robert Banik Tamper evident adaptor closure
USD948713S1 (en) 2019-09-03 2022-04-12 International Medical Industries, Inc. Asymmetrical self righting tip cap
US11357588B1 (en) 2019-11-25 2022-06-14 Patrick Vitello Needle packaging and disposal assembly
US11413406B1 (en) 2018-03-05 2022-08-16 Jonathan J. Vitello Tamper evident assembly
US11426328B1 (en) 2018-08-31 2022-08-30 Alexander Ollmann Closure for a medical container
US11471610B1 (en) 2018-10-18 2022-10-18 Robert Banik Asymmetrical closure for a medical device
US11523970B1 (en) 2020-08-28 2022-12-13 Jonathan Vitello Tamper evident shield
US11541180B1 (en) 2017-12-21 2023-01-03 Patrick Vitello Closure assembly having a snap-fit construction
US11690994B1 (en) 2018-07-13 2023-07-04 Robert Banik Modular medical connector
US11697527B1 (en) 2019-09-11 2023-07-11 Logan Hendren Tamper evident closure assembly
US11779520B1 (en) 2018-07-02 2023-10-10 Patrick Vitello Closure for a medical dispenser including a one-piece tip cap
US11793987B1 (en) 2018-07-02 2023-10-24 Patrick Vitello Flex tec closure assembly for a medical dispenser
US11857751B1 (en) 2018-07-02 2024-01-02 International Medical Industries Inc. Assembly for a medical connector
US11872187B1 (en) 2020-12-28 2024-01-16 Jonathan Vitello Tamper evident seal for a vial cover
US11911339B1 (en) 2019-08-15 2024-02-27 Peter Lehel Universal additive port cap
US12070591B1 (en) 2020-12-14 2024-08-27 Patrick Vitello Snap action tamper evident closure assembly

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FR529263A (en) * 1920-12-30 1921-11-25 Francois Auguste Houpeau Glass syringe improvement
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US2875761A (en) * 1956-10-01 1959-03-03 Norman D Helmer Multiple dosage syringe

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GB189505992A (en) * 1895-03-22 1895-05-24 Leonhard Schmidt An Improved Hypodermic Syringe.
US1343085A (en) * 1919-08-14 1920-06-08 William F Lerch Liquid-dispensing device
FR529263A (en) * 1920-12-30 1921-11-25 Francois Auguste Houpeau Glass syringe improvement
US1499508A (en) * 1923-04-07 1924-07-01 Herbert C Deane Hypodermic syringe
US2739590A (en) * 1955-01-10 1956-03-27 Donald E Yochem Hypodermic syringe gauge
US2875761A (en) * 1956-10-01 1959-03-03 Norman D Helmer Multiple dosage syringe

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3881484A (en) * 1973-07-05 1975-05-06 Jr Charles F Gidcumb Mixing syringe having a rotationally restrained piston rod
US4018223A (en) * 1974-12-09 1977-04-19 Andros Incorporated Dosage control device
US4589870A (en) * 1984-02-21 1986-05-20 Indicon, Inc. Incremental actuator for syringe
US4813937A (en) * 1986-05-07 1989-03-21 Vaillancourt Vincent L Ambulatory disposable infusion delivery system
US4715854A (en) * 1986-07-17 1987-12-29 Vaillancourt Vincent L Multidose disposable syringe and method of filling same
US5135507A (en) * 1990-05-10 1992-08-04 Habley Medical Technology Corporation One-piece syringe
US5356393A (en) * 1990-05-10 1994-10-18 Habley Medical Technology Corporation Plural diameter syringe
US5524576A (en) * 1994-10-31 1996-06-11 Walther; Dale D. Animal oral feeding/injecting device
US6652493B1 (en) 2000-07-05 2003-11-25 Animas Corporation Infusion pump syringe
US8419682B2 (en) * 2003-02-27 2013-04-16 B. Braun Melsungen Ag Safety syringes
US8758296B2 (en) 2003-02-27 2014-06-24 B. Braun Melsungen Ag Safety syringes
US20070156098A1 (en) * 2003-02-27 2007-07-05 B. Braun Melsungen Ag Safety syringes
US20090216188A1 (en) * 2003-02-27 2009-08-27 Kevin Woehr Safety syringes
US8137324B2 (en) 2005-08-11 2012-03-20 Arzneimittel Gmbh Apotheker Vetter & Co. Ravensburg Syringe with internal safety device
US20090227957A1 (en) * 2005-08-11 2009-09-10 Arzneimittel Gmbh Apotheker Vetter & Co. Ravensbur Syringe
DE102005037962A1 (en) * 2005-08-11 2007-02-15 Arzneimittel Gmbh Apotheker Vetter & Co. Ravensburg syringe
US20070106226A1 (en) * 2005-11-09 2007-05-10 Croll Perry W Syringe with internal sleeve
US10183129B1 (en) 2010-12-03 2019-01-22 Medical Device Engineering, Llc Tamper indicating closure assembly
US10398844B2 (en) 2012-11-02 2019-09-03 Cook Medical Technologies Llc Controlled injection devices, systems, and methods
US9956384B2 (en) 2014-01-24 2018-05-01 Cook Medical Technologies Llc Articulating balloon catheter and method for using the same
US11040154B1 (en) 2014-02-03 2021-06-22 Medical Device Engineering Llc Tamper evident cap for medical fitting
US10912898B1 (en) 2014-02-03 2021-02-09 Medical Device Engineering Llc Tamper evident cap for medical fitting
US10207099B1 (en) 2014-02-21 2019-02-19 Patrick Vitello Closure assembly for medical fitting
US10166347B1 (en) 2014-07-18 2019-01-01 Patrick Vitello Closure assembly for a medical device
US10300263B1 (en) 2015-02-27 2019-05-28 Timothy Brandon Hunt Closure assembly for a medical connector
US10166343B1 (en) 2015-03-13 2019-01-01 Timothy Brandon Hunt Noise evident tamper cap
US10315024B1 (en) 2015-03-19 2019-06-11 Patick Vitello Torque limiting closure assembly
US10307548B1 (en) 2016-12-14 2019-06-04 Timothy Brandon Hunt Tracking system and method for medical devices
US11097071B1 (en) 2016-12-14 2021-08-24 International Medical Industries Inc. Tamper evident assembly
US10953162B1 (en) 2016-12-28 2021-03-23 Timothy Brandon Hunt Tamper evident closure assembly
US10758684B1 (en) 2017-03-03 2020-09-01 Jonathan J. Vitello Tamper evident assembly
US11040149B1 (en) 2017-03-30 2021-06-22 International Medical Industries Tamper evident closure assembly for a medical device
US10888672B1 (en) 2017-04-06 2021-01-12 International Medical Industries, Inc. Tamper evident closure assembly for a medical device
US10898659B1 (en) 2017-05-19 2021-01-26 International Medical Industries Inc. System for handling and dispensing a plurality of products
US10933202B1 (en) 2017-05-19 2021-03-02 International Medical Industries Inc. Indicator member of low strength resistance for a tamper evident closure
US11541180B1 (en) 2017-12-21 2023-01-03 Patrick Vitello Closure assembly having a snap-fit construction
US11278681B1 (en) 2018-02-20 2022-03-22 Robert Banik Tamper evident adaptor closure
US11413406B1 (en) 2018-03-05 2022-08-16 Jonathan J. Vitello Tamper evident assembly
US11779520B1 (en) 2018-07-02 2023-10-10 Patrick Vitello Closure for a medical dispenser including a one-piece tip cap
US11793987B1 (en) 2018-07-02 2023-10-24 Patrick Vitello Flex tec closure assembly for a medical dispenser
US11857751B1 (en) 2018-07-02 2024-01-02 International Medical Industries Inc. Assembly for a medical connector
US11690994B1 (en) 2018-07-13 2023-07-04 Robert Banik Modular medical connector
US11426328B1 (en) 2018-08-31 2022-08-30 Alexander Ollmann Closure for a medical container
US11471610B1 (en) 2018-10-18 2022-10-18 Robert Banik Asymmetrical closure for a medical device
USD903865S1 (en) 2018-11-19 2020-12-01 International Medical Industries, Inc. Self-righting tip cap
US11911339B1 (en) 2019-08-15 2024-02-27 Peter Lehel Universal additive port cap
USD948713S1 (en) 2019-09-03 2022-04-12 International Medical Industries, Inc. Asymmetrical self righting tip cap
US11697527B1 (en) 2019-09-11 2023-07-11 Logan Hendren Tamper evident closure assembly
US11357588B1 (en) 2019-11-25 2022-06-14 Patrick Vitello Needle packaging and disposal assembly
US11523970B1 (en) 2020-08-28 2022-12-13 Jonathan Vitello Tamper evident shield
US12070591B1 (en) 2020-12-14 2024-08-27 Patrick Vitello Snap action tamper evident closure assembly
US11872187B1 (en) 2020-12-28 2024-01-16 Jonathan Vitello Tamper evident seal for a vial cover

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