US3906947A - Syringe - Google Patents

Syringe Download PDF

Info

Publication number
US3906947A
US3906947A US9822570A US3906947A US 3906947 A US3906947 A US 3906947A US 9822570 A US9822570 A US 9822570A US 3906947 A US3906947 A US 3906947A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
barrel
end
flange
fluid
cannula
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
Inventor
Harold S Cloyd
Original Assignee
Harold S Cloyd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • 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
    • A61M5/2422Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
    • A61M5/2429Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule by telescoping of ampoules or carpules with the syringe body
    • 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
    • A61M3/00Medical syringes, e.g. enemata; Irrigators
    • 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
    • A61M5/315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513Piston constructions to improve sealing or sliding
    • 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
    • A61M5/315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511Piston or piston-rod constructions, e.g. connection of piston with piston-rod

Abstract

A syringe having a one piece plastic cannula, piston and plunger.

Description

Unlted States Patent [1 1 3,906,947 Cloyd Sept. 23, 1975 [54] SYRINGE 2,539,510 1/1951 Friden 128/220 22 [76] Inventor: Harold s. Cloyd, 3244 Willis 51., 5 4 Erie, Pa. 3,378,008 4/1968 Ogle 128/220 [22] Filed: FOREIGN PATENTS 0 R APPLICATIONS 21 App]. No.: 98,225 1,333,235 6/1963 France 128/218 1,228,933 9/1960 France 128/218 52 U.S. Cl. 128/237; 128/218 P; 128/220 51 1111.01 A61M 1/00 PmfWY "f' Gaude [58] Field of Search 128/237, 234, 213, 215, fl- Yasko Attorney, Agent, or Hammar [56] Refenences Cited 57 ABSTRACT UNITED STATES PATENTS A syringe having a one piece plastic cannula, piston 497,250 5/1893 Oliver 128/237 and plunger 2,448,898 9/1948 Lockhal't 128/220 2,512,568 6/1950 Saffir 128/221 X 6 Claims, 3 Drawing Figures US Patent Sept. 23,1975

FIG.\

INVENTOR ATTORNEY SYRINGE This invention is a syringe which consists essentially of three molded plastic parts; a plunger, piston and cannula; a barrel; and a cap for the cannula.

In the drawing,

FIG. 1 is a longitudinal section on line 1-l of FIG. 3 through a preferred form of syringe,

FIG. 2 is an enlarged fragmentary section of the piston, and

FIG. 3 is a section on line 3-3 of FIG. 1.

The barrel of the syringe is a fluid containing vial 1 closed at one end 2 and having a finger gripping flange 3 at its opposite or open end. The vial may be made of one of the flexible plastics such as polypropylene or other plastic compatible with the fluid contents.

The cannula 4, likewise of molded plastic, has its fluid receiving end 5 presented to the closed end of the barrel and has its fluid discharging end 6 projecting outside the open end of the barrel. The fluid discharging end is normally closed or protected by a cap 7 which may be of any suitable plastic or other material. The fluid receiving end of the cannula is integral with a circular end wall 8 having an integral hollow cylindri cal peripheral flange 9 extending toward the open end of the barrel. Integral with the inner edge of the flange 9 is the inner edge 10 of an annular flange 1 1 extending outwardly at an acute angle toward the bottom wall of the barrel. The annular flange 11 is relatively thick, for example 30 mils, and is quite narrow or short as measured in a plane including the axis of the barrel for example one-eighth inch, so that it is relatively stiff. The outside diameter of the outer edge 13 of the annular flange is from 5 to 20 mils greater than the inside diameter of the bore of the vial so the deflection of the flange 1 1 results in adequate pressure between the edge 13 and the bore of the barrel so that the syringe can be shipped assembled and filled with the fluid to be dispensed. The outer edge of the flange 11 is not feathered so that adequate sealing pressure is built up by deflection of the flange to maintain the seal under static conditions. When fluid is being dispensed, the hydraulic pressure entering the groove 14 between the flanges 9 and 11 augments the sealing pressure. The end wall 8, flanges 9, 11 and junction 15 between the flanges comprise the piston. The junction 15 between the flanges 9 and 11 is joined to a cylindrical wall or plunger 16 which has a loose sliding fit in the barrel 1. The outer flange 17. A rigid support for the cannula 4 is provided by a plurality of axially extending ribs 18 having inner ends 19 joined to the end wall 8 and having inner and outer edges 20 and 21 joined respectively to the outer surface of the cannula 4 and the inner surface of the cylindrical wall 16.

All of the parts of the syringe are adapted to molding from plastic in simple molds resulting in low cost, high speed manufacture so the syringe may be used only once and thrown away, The particular syringe shown was designed to hold a fluid for the treatment of Mastitis.

The flexible plastic flange 11 has no tendency to stick to the barrel and does not require lubrication, an important advantage in syringes which are to be shipped assembled and filled.

What is claimed is:

1. A syringe comprising a barrel closed fluid tight at one end and open at the other end, and a single piece of flexible plastic which forms the seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed and constitutes a cannula, piston and plunger,

said cannula having a fluid receiving end presented to the closed end of the barrel and a fluid discharging end extending out through the open end of the barrel, said plunger having one end. outside the open end of the barrel and the other end inside the barrel,

said piston having an end wall at the other end of the plunger integral with said fluid receiving end of the cannula and a peripheral flange extending from said end wall back toward the open end of the barre] and an annular flange having its inner edge integral with said peripheral flange, said flange diverging from said peripheral flange toward the closed end of the barrel at an acute angle and having sliding contact with the bore of the barrel,

said seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed resulting from the outside diameter of the outer edge of said flange being greater than the in side diameter of the bore of the vial and said flange being stiff enough so the deflection of the flange by static engagement of the outer edge of the flange and the bore results in adequate sealing pressure between the outer edge of the flange and the bore of the barrel to provide and maintain a leak proof seal under static conditions so that the syringe can be shipped assembled and filled with the fluid to be dispensed, the essential stiffness of the flange and sealing pressure under static conditions being obtained when said flange is thick and narrow and has a thick non feathered outer edge of outside diameter greater than the bore of the barrel,

and removable means on and closing the fluid discharge end of the cannula.

2. The syringe of claim 1 having longitudinal ribs sur rounding and fixed to said cannula.

3. The syringe of claim 2 in which said ribs have longitudinal edges fixed to a cylindrical wall.

4. The syringe of claim 1 in which the barrel is prefilled with the fluid to be dispensed and the fluid receiving end of the cannula is at all times in communication with said fluid.

5. A syringe comprising a barrel closed fluid tight at one end and open at the other end, and a single piece of flexible plastic which forms the seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed and constitutes a cannula, piston and plunger,

said cannula having a fluid receiving end presented to the closed end of the barrel and a fluid discharging end extending out through the open end of the barrel,

said plunger having one end outside the open end of the barrel and the other end inside the barrel,

the piston having an end wall. at the other end of the plunger integral with said fluid receiving end of the cannula and an annular flange having its inner edge integral with the periphery of said wall, said flange diverging from the periphery of said wall toward the closed end of the barrel at an acute angle and having sliding contact with the bore of the barrel,

the plunger having axially extending ribs projecting from said cannula, said ribs having ends joined to said bottom wall and having longitudinal edges joined to said cannula,

said seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed resulting from the outside diameter of the outer edge of said flange being greater than the inside diameter of the bore of the vial and said flange being stiff enough so the deflection of the flange by static engagement of the outer edge of the flange and the bore result in adequate sealing pressure between the outer edge of the flange and the bore of the barrel to provide and maintain a leak proof seal under static conditions so that the syringe can be assembled and filled with the fluid to be dispensed, the essential stiffness of the flange and sealing pressure under static conditions being obtained when said flange is thick and narrow and has a thick non feathered outer edge of outside diameter greater than the bore of the barrel, and removable means on and closing the fluid discharge end of the cannula.

6. The syringe of claim 5 in which the plunger has a cylindrical wall slidably fitting the barrel and having its end inside the barrel integral with the cannula and the longitudinal edges of said ribs joined to said cylindrical

Claims (6)

1. A syringe comprising a barrel closed fluid tight at one end and open at the other end, and a single piece of flexible plastic which forms the seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed and constitutes a cannula, piston and plunger, said cannula having a fluid receiving end presented to the closed end of the barrel and a fluid discharging end extending out through the open end of the barrel, said plunger having one end outside the open end of the barrel and the other end inside the barrel, said piston having an end wall at the other end of the plunger integral with said fluid receiving end of the cannula and a peripheral flange extending from said end wall back toward the open end of the barrel and an annular flange having its inner edge integral with said peripheral flange, said flange diverging from said peripheral flange toward the closed end of the barrel at an acute angle and having sliding contact with the bore of the barrel, said seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed resulting from the outside diameter of the outer edge of said flange being greater than the inside diameter of the bore of the vial and said flange being stiff enough so the deflection of the flange by static engagement of the outer edge of the flange and the bore results in adequate sealing pressure between the outer edge of the flange and the bore of the barrel to provide and maintain a leak proof seal under static conditions so that the syringe can be shipped assembled and filled with the fluid to be dispensed, the essential stiffness of the flange and sealing pressure under static conditions being obtained when said flange is thick and narrow and has a thick non feathered outer edge of outside diameter greater than the bore of the barrel, and removable means on and closing the fluid discharge end of the cannula.
2. The syringe of claim 1 having longitudinal ribs surrounding and fixed to said cannula.
3. The syringe of claim 2 in which said ribs have longitudinal edges fixed to a cylindrical wall.
4. The syringe of claim 1 in which the barrel is prefilled with the fluid to be dispensed and the fluid receiving end of the cannula is at all times in communication with said fluid.
5. A syringe comprising a barrel closed fluid tight at one end and open at the other end, and a single piece of flexible plastic which forms the seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed and constitutes a cannula, piston and plunger, said cannula having a fluid receiving end presented to the closed end of the barrel and a fluid discharging end extending out through the open end of the barrel, said plunger having one end outside the open end of the barrel and the other end inside the barrel, the piston having an end wall at the other end of the plunger integral with said fluid receiving end of the cannula and an annular flange having its inner edge integral with the periphery of said wall, said flange diverging from the periphery of said wall toward the closed end of the barrel at an acute angle and having sliding contact with the bore of the barrel, the plunger having axially extending ribs projecting from said cannula, said ribs having ends joined to said bottom wall and having longitudinal edges joined to said cannula, said seal to the barrel required for shipping the syringe assembled and filled with the fluid to be dispensed resulting from the outside diameter of the outer edge of said flange being greater than the inside diameter of the bore of the vial and said flange being stiff enough so the deflection of the flange by static engagement of the outer edge of the flange and the bore result in adequate sealing pressure between the outer edge of the flange and the bore of the barrel to provide and maintain a leak proof seal under static conditions so that the syringe can be assembled and fIlled with the fluid to be dispensed, the essential stiffness of the flange and sealing pressure under static conditions being obtained when said flange is thick and narrow and has a thick non feathered outer edge of outside diameter greater than the bore of the barrel, and removable means on and closing the fluid discharge end of the cannula.
6. The syringe of claim 5 in which the plunger has a cylindrical wall slidably fitting the barrel and having its end inside the barrel integral with the cannula and the longitudinal edges of said ribs joined to said cylindrical wall.
US3906947A 1970-12-15 1970-12-15 Syringe Expired - Lifetime US3906947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3906947A US3906947A (en) 1970-12-15 1970-12-15 Syringe

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US3906947A US3906947A (en) 1970-12-15 1970-12-15 Syringe
DE19712161675 DE2161675A1 (en) 1970-12-15 1971-12-13
IT5473171A IT945428B (en) 1970-12-15 1971-12-14 Improvement in syringes made of plastic material
FR7145142A FR2118668A5 (en) 1970-12-15 1971-12-15
GB5828971A GB1334029A (en) 1970-12-15 1971-12-15 Syringe

Publications (1)

Publication Number Publication Date
US3906947A true US3906947A (en) 1975-09-23

Family

ID=22268153

Family Applications (1)

Application Number Title Priority Date Filing Date
US3906947A Expired - Lifetime US3906947A (en) 1970-12-15 1970-12-15 Syringe

Country Status (4)

Country Link
US (1) US3906947A (en)
DE (1) DE2161675A1 (en)
FR (1) FR2118668A5 (en)
GB (1) GB1334029A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712715A (en) * 1985-07-06 1987-12-15 Artur Fischer Device for injecting a fixing agent into a drilled hole for anchoring a fastening element inserted in a drilled hole
WO1991000747A1 (en) * 1989-07-12 1991-01-24 Edward Robert James Kayser Hypodermic syringe
US5380297A (en) * 1992-07-28 1995-01-10 Inject Development Limited Syringe
US20020091411A1 (en) * 2000-12-07 2002-07-11 Saker Mark B. Tissue tract sealing device
WO2005001487A1 (en) * 2003-06-27 2005-01-06 Invetech Pty Ltd Method and apparatus for sampling a fluid
EP1799288A1 (en) * 2004-09-16 2007-06-27 Inviro Medical Devices Ltd. Disposable safety syringe to prevent needlestick injuries and reuse
WO2013113956A2 (en) 2012-01-30 2013-08-08 Biotchnology Institute, I Mas D, S.L. Adapter for reducing or eliminating possible bacterial contamination from a process involving the removal or transfer of blood components from at least one container

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2932719C2 (en) * 1979-08-13 1985-08-14 Dieter Dr. 7763 Oehningen De Lucas
DE2951411A1 (en) * 1979-12-20 1981-07-02 Richard Himmelsbach A strainer for bacterial sterilization of surgical equipment COOLANT in pine
FR2522506B1 (en) * 1982-01-27 1989-04-28 Biotherax Lab rectal cannula for injecting a medicinal product in the form of paste or foam
GB2149308A (en) * 1983-10-19 1985-06-12 Locali Pty Limited Unit dose injection device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US497250A (en) * 1893-05-09 George s
US2448898A (en) * 1945-04-21 1948-09-07 Marshall L Lockhart Hypodermic needle
US2512568A (en) * 1946-08-13 1950-06-20 Jacob A Saffir Hypodermic injection device
US2539510A (en) * 1949-06-03 1951-01-30 Bristol Lab Inc Hypodermic syringe
US2604095A (en) * 1948-12-18 1952-07-22 Brody Nathan Disposable syringe
US3066671A (en) * 1959-10-27 1962-12-04 Milton J Cohen Disposable additive container
US3378008A (en) * 1965-07-23 1968-04-16 Min I Jet Corp Hypodermic syringe with vial

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US497250A (en) * 1893-05-09 George s
US2448898A (en) * 1945-04-21 1948-09-07 Marshall L Lockhart Hypodermic needle
US2512568A (en) * 1946-08-13 1950-06-20 Jacob A Saffir Hypodermic injection device
US2604095A (en) * 1948-12-18 1952-07-22 Brody Nathan Disposable syringe
US2539510A (en) * 1949-06-03 1951-01-30 Bristol Lab Inc Hypodermic syringe
US3066671A (en) * 1959-10-27 1962-12-04 Milton J Cohen Disposable additive container
US3378008A (en) * 1965-07-23 1968-04-16 Min I Jet Corp Hypodermic syringe with vial

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712715A (en) * 1985-07-06 1987-12-15 Artur Fischer Device for injecting a fixing agent into a drilled hole for anchoring a fastening element inserted in a drilled hole
WO1991000747A1 (en) * 1989-07-12 1991-01-24 Edward Robert James Kayser Hypodermic syringe
GB2239608A (en) * 1989-07-12 1991-07-10 Edward Robert James Kayser Hypodermic syringe
GB2239608B (en) * 1989-07-12 1993-01-20 Edward Robert James Kayser Hypodermic syringe
US5380297A (en) * 1992-07-28 1995-01-10 Inject Development Limited Syringe
US20020091411A1 (en) * 2000-12-07 2002-07-11 Saker Mark B. Tissue tract sealing device
US6840952B2 (en) * 2000-12-07 2005-01-11 Mark B. Saker Tissue tract sealing device
WO2005001487A1 (en) * 2003-06-27 2005-01-06 Invetech Pty Ltd Method and apparatus for sampling a fluid
US20070056360A1 (en) * 2003-06-27 2007-03-15 Invetech Pty Ltd Method and apparatus for sampling a fluid
EP1799288A1 (en) * 2004-09-16 2007-06-27 Inviro Medical Devices Ltd. Disposable safety syringe to prevent needlestick injuries and reuse
EP1799288A4 (en) * 2004-09-16 2008-11-19 Inviro Medical Devices Inc Disposable safety syringe to prevent needlestick injuries and reuse
WO2013113956A2 (en) 2012-01-30 2013-08-08 Biotchnology Institute, I Mas D, S.L. Adapter for reducing or eliminating possible bacterial contamination from a process involving the removal or transfer of blood components from at least one container

Also Published As

Publication number Publication date Type
FR2118668A5 (en) 1972-07-28 application
DE2161675A1 (en) 1972-07-20 application
GB1334029A (en) 1973-10-17 application

Similar Documents

Publication Publication Date Title
US3556099A (en) Hypodermic syringe assembly
US3406686A (en) Prefilled syringe
US3329146A (en) Needle container
US3552387A (en) Combination syringe and vial
US3279654A (en) Syringe
US3542024A (en) Hypodermic assembly
US3330281A (en) Combination syringe and vial mixing container
US3545607A (en) Self-contained packaged needle assembly
US3587937A (en) Combined container and dispensing cap
US3434615A (en) Centrifuge bottle and closure therefor
US3390759A (en) Shield and hub for disposable needle
US3669323A (en) One-way valve insert for collapsible dispensing containers
US5380281A (en) Device for the administration of drugs, particularly two-component drugs
US4465476A (en) Injection syringe for injecting two liquids
US5353691A (en) Self-lubricating piston for pharmaceutical container
US3941128A (en) Fluid dispensing arrangement
US2842126A (en) Syringe assembly
US6520935B1 (en) Syringe and tip cap assembly
US3834596A (en) Bottle-closure structure
US2514575A (en) Introversion syringe
US2778360A (en) Hypodermic syringe
US4678107A (en) Dripless dispenser for liquids and viscous fluids
US1948982A (en) Hypodermic syringe
US3756390A (en) Two-compartment aspirating disposable hypodermic syringe package
US6632199B1 (en) Syringe assembly including plastic tip cap