US3845762A - Syringe - Google Patents

Syringe Download PDF

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Publication number
US3845762A
US3845762A US00075121A US7512170A US3845762A US 3845762 A US3845762 A US 3845762A US 00075121 A US00075121 A US 00075121A US 7512170 A US7512170 A US 7512170A US 3845762 A US3845762 A US 3845762A
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US
United States
Prior art keywords
barrel
needle
syringe
piston
bore
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
US00075121A
Inventor
H Cloyd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NESCO PLASTICS Inc
Original Assignee
NESCO PLASTICS Inc
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
Application filed by NESCO PLASTICS Inc filed Critical NESCO PLASTICS Inc
Priority to US00075121A priority Critical patent/US3845762A/en
Priority to DE19712144692 priority patent/DE2144692A1/en
Priority to CA122,240A priority patent/CA953594A/en
Priority to GB4240871A priority patent/GB1312174A/en
Priority to FR7134101A priority patent/FR2108404A5/fr
Priority to IT53049/71A priority patent/IT942191B/en
Application granted granted Critical
Publication of US3845762A publication Critical patent/US3845762A/en
Anticipated expiration legal-status Critical
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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • 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
    • A61M5/28—Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
    • 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
    • A61M5/31513—Piston constructions to improve sealing or sliding
    • 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
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
    • A61M5/343—Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub

Definitions

  • This invention is a syringe which in a preferred form consists of two units, one unit being a combined needle protector, piston, and piston rod, and the other unit being a barrel and needle assembly.
  • FIG. 1 is a longitudinal section through the syringe with the parts assembled for shipment
  • FIG. 2 is a similar section with the parts assembled for use, and
  • F IG. 3 is an enlarged fragmentary section through the piston and the adjacent portion of the barrel.
  • the syringe comprises a needle barrel assembly I and a combined needle protector, piston rod, and piston 2. Each of these parts is adapted to manufacture as a separate unit from molded plastics.
  • the needle 3 has its upper end molded into a needle hub 4 at the lower end of the barrel.
  • the needle is preferably secured in the hub by a bend 5 which mechanically anchors the needle in the hub.
  • Other expedients are known for securing the needle in the hub.
  • Surrounding the hub is an integral downwardly extending cylindrical flange 6 over which the upper end of the needle protector 2 is telescoped. The fit between the flange 6 and the needle protector is adequate to hold the needle protector in place during shipment. If the hub 4 were of larger diameter, the flange 6 would not be needed.
  • integral finger grip projections 7 for holding the barrel during use.
  • an enlarged taper 8 for leading the piston into the bore of the barrel.
  • the needle protector piston assembly 2 is of generally tubular shape with an outwardly extending flange 9 at its upper end and closed at its lower end by conical walls 10 complementary to the frusto-conical surfaces II at the lower end of the barrel.
  • the outer surface of the needle protector has an outside diameter sufficiently smaller than the inside diameter of the barrel to provide a loose, sliding fit when assembled into the barrel as shown in FIG. 2.
  • At the lower end of the needle protector are two outwardly projecting sealing members which either separately or together provide a fluidtight seal with the bore of the barrel.
  • the lowermost seal comprises an annular flange 12 having its upper end integral with the needle protector at l3 and inclined downwardly and outwardly at an acute angle to the axis of the needle protector.
  • the flange l2 terminates in a thick, non feathered edge 14 having an outside diameter sufflciently larger than the bore of the barrel so as to provide a fluid-tight seal.
  • the flange 12 is in effect cantilevered at 13 and the free end 14 is deflected inward from the dotted line position to the full line position as shown in FIG. 3 to provide the required sealing pressure.
  • the part 2 is relatively rigid due to the reinforcing action obtained from the conical walls 10.
  • annular rib 15 having a peripheral edge 16 of a slightly larger outside diameter than the bore of the barrel 1.
  • the side wall of the part 2 may deflect inwardly as indicated at 17 to limit the sealing pressure. At this point the side wall is yieldable and provides a spring action similar to the cantilevered flange 12.
  • the rib 15 is of generally sawtooth configuration with an abrupt shoulder 18 facing the lower end of the part 2 and an inclined face 19 facing the open end of the part 2.
  • the parts 1 and 2 are shipped assembled in a first mode of assembly as shown in FIG. 1 with the part 2 serving as a protector for the needle 3.
  • the assembly would be over packed in a sterile package.
  • FIG. 1 Upon arriving at the point of use, the assembly of FIG. 1 would be removed from its package and the needle protector 2 inserted in the barrel 1 in a second mode of assembly until the conical wall 10 bottoms on the surfaces 11 as shown in FIG. 2. In this position,
  • the parts 1 and 2 are adapted to plastic molding from the usual plastics such as polyethylene, polypropylene, etc.
  • the manufacturing cost is low enough so that the syringe may be used once and then thrown away.
  • a syringe consisting essentially of first and second units which may be assembled end to end in either of two modes, namely, a first mode to protect the needle or a second mode as an operative syringe,
  • the first unit comprising a barrel and needle assembly in which the barrel is open at one end and closed at the other end by a needle hub fixed to the barrel and in which the needle has one end fixed to the hub and communicating withthe bore of the barrel and has the other end projecting from the hub for presentation to an injection site
  • the second unit comprising a combined needle protector, piston and piston rod having a body which is closed at oneend and has a needle receiving recess entering the other end of the body, the closed end of the body having structure acting as a piston making sealing engagement with the bore of the barrel when the closed endof the body is inserted in the barrel, the other end of the body having means for releasably coupling it to the closed end of the barrel with the needle received in said recess, and
  • the body serving as a needle protector when coupled to the closed end of the barrel

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)

Abstract

A syringe consisting of two units, one unit being a combined needle protector, piston, and piston rod, and the other unit being a barrel and needle assembly.

Description

United States Patent Cloyd 1 1 Nov. 5, 1974 1 1 SYRINGE 3.135.261 (7/1964 Clll'l'Oll 128/22 a '3') [75} inventor: Harold S cloyd, Eric, Pa 3.434.468 3/1969 B11rr,Sr, 21,11. 1. 1 8 1 FOREIGN PATENTS OR APPLICATIONS [73] 3: Hashes Incorporated Erie 919,939 2/1963 Great 131116111 128/218 R 242.700 1/1963 Australia 128 218 R 1221 Filed: Sept. 24, 1970 1.333.235 6/1963 France 128/218 P 366.126 1/1963 Switzerland 128/218 R 1 1 pp 1 01 5.121 870,669 6 1961 016111 Britflll'l 128/220 1521 US. Cl. 128/218 P Primary Exami'wr"Richard Gaudct 1511 1111. c1 A61m 5/22 McGowan [58] Field 01 Search 128/218 P, 218 PA, 218 R, Attorney 8 01 Firm-Ralph Hammar 26,1218 N 57] ABSTRACT A syringe consisting of two units, one unit being a [561 References Cited combined needle protector, piston, and piston rod, UNITED STATES PATENTS and the other unit being a barrel and needle assembly. 2.959.171) 11/1961) Laub 128/218 N 6 Claims, 3 Drawing Figures N l/ '1 8 1 N 8 SYRINGE This invention is a syringe which in a preferred form consists of two units, one unit being a combined needle protector, piston, and piston rod, and the other unit being a barrel and needle assembly.
In the drawing,
FIG. 1 is a longitudinal section through the syringe with the parts assembled for shipment,
FIG. 2 is a similar section with the parts assembled for use, and
F IG. 3 is an enlarged fragmentary section through the piston and the adjacent portion of the barrel.
The syringe comprises a needle barrel assembly I and a combined needle protector, piston rod, and piston 2. Each of these parts is adapted to manufacture as a separate unit from molded plastics.
The needle 3 has its upper end molded into a needle hub 4 at the lower end of the barrel. The needle is preferably secured in the hub by a bend 5 which mechanically anchors the needle in the hub. Other expedients are known for securing the needle in the hub. Surrounding the hub is an integral downwardly extending cylindrical flange 6 over which the upper end of the needle protector 2 is telescoped. The fit between the flange 6 and the needle protector is adequate to hold the needle protector in place during shipment. If the hub 4 were of larger diameter, the flange 6 would not be needed. At the upper end of the barrel are integral finger grip projections 7 for holding the barrel during use. At the extreme upper end of the barrel is an enlarged taper 8 for leading the piston into the bore of the barrel.
The needle protector piston assembly 2 is of generally tubular shape with an outwardly extending flange 9 at its upper end and closed at its lower end by conical walls 10 complementary to the frusto-conical surfaces II at the lower end of the barrel. The outer surface of the needle protector has an outside diameter sufficiently smaller than the inside diameter of the barrel to provide a loose, sliding fit when assembled into the barrel as shown in FIG. 2. At the lower end of the needle protector are two outwardly projecting sealing members which either separately or together provide a fluidtight seal with the bore of the barrel. The lowermost seal comprises an annular flange 12 having its upper end integral with the needle protector at l3 and inclined downwardly and outwardly at an acute angle to the axis of the needle protector. The flange l2 terminates in a thick, non feathered edge 14 having an outside diameter sufflciently larger than the bore of the barrel so as to provide a fluid-tight seal. The flange 12 is in effect cantilevered at 13 and the free end 14 is deflected inward from the dotted line position to the full line position as shown in FIG. 3 to provide the required sealing pressure. At point 13, the part 2 is relatively rigid due to the reinforcing action obtained from the conical walls 10.
An additional seal is provided by an annular rib 15 having a peripheral edge 16 of a slightly larger outside diameter than the bore of the barrel 1. When inserted in the barrel of the bore, the side wall of the part 2 may deflect inwardly as indicated at 17 to limit the sealing pressure. At this point the side wall is yieldable and provides a spring action similar to the cantilevered flange 12. The rib 15 is of generally sawtooth configuration with an abrupt shoulder 18 facing the lower end of the part 2 and an inclined face 19 facing the open end of the part 2.
The parts 1 and 2 are shipped assembled in a first mode of assembly as shown in FIG. 1 with the part 2 serving as a protector for the needle 3. The assembly would be over packed in a sterile package.
Upon arriving at the point of use, the assembly of FIG. 1 would be removed from its package and the needle protector 2 inserted in the barrel 1 in a second mode of assembly until the conical wall 10 bottoms on the surfaces 11 as shown in FIG. 2. In this position,
sealing contact with the bore of the barrel is established between the edge 14 of the flange l2 and the surface 16 of the rib 15. The sealing contact of the flange of the edge 14 is adequate so the rib 15 is usually not necessary. By retracting the part 2 from the barrel l,a suction is developed for filling the syringe through the needle 3 in the usual manner. Then, by pushing the part 2 inward, the fluid is expelled or ejected. During the pressure or ejection stroke, the flange 12 is subject to hydraulic action due to the fluid pressure on the surface 20 which increases the sealing pressure.
The parts 1 and 2 are adapted to plastic molding from the usual plastics such as polyethylene, polypropylene, etc. The manufacturing cost is low enough so that the syringe may be used once and then thrown away.
What is claimed is:
l. A syringe consisting essentially of first and second units which may be assembled end to end in either of two modes, namely, a first mode to protect the needle or a second mode as an operative syringe,
the first unit comprising a barrel and needle assembly in which the barrel is open at one end and closed at the other end by a needle hub fixed to the barrel and in which the needle has one end fixed to the hub and communicating withthe bore of the barrel and has the other end projecting from the hub for presentation to an injection site, I the second unit comprising a combined needle protector, piston and piston rod having a body which is closed at oneend and has a needle receiving recess entering the other end of the body, the closed end of the body having structure acting as a piston making sealing engagement with the bore of the barrel when the closed endof the body is inserted in the barrel, the other end of the body having means for releasably coupling it to the closed end of the barrel with the needle received in said recess, and
in said first mode of assembly the body serving as a needle protector when coupled to the closed end of the barrel,
in said second mode of assembly the closed end of the body being a piston making sealing engagement with the bore of the barrel when the closed end of the body is inserted in the barrel with the other end of the body remote from the closed end of the barrel and the body then being a piston rod for reciprocating the piston. 2. The syringe of claim 1 in which the first .unitis a one piece barrel and hub.
3. The syringe of claim 1 in which the second unit is in one piece of flexible plastic.
4. The syringe of claim 3 in which the body has tubular walls between its ends with a loose sliding fit in the bore of the barrel.
5. The syringe of claim 4 in which the piston has an 6. The syringe of claim 4 in which the piston has an integral flange extending outward fro Said tubular external rib integral with the tubular walls and engaging walls at an acute angle toward the closed end of the the bore of the barrel.
body and has a non feathered edge contacting the bore of the barrel. 5 g
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent NO- 3.845.762 Dated November 5, 1974 Inventor(s) Harold S. Cloyd It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
The Assignee should read:
-- Nosco Plastics Incorporated Signed and Scaled this Thirty-first Day of May 1977 [SEAL] Arrest:
RUTH C. MASON C. MARSHALL DANN 411931918 ff Commissioner nfParents and Trademarks

Claims (6)

1. A syringe consisting essentially of first and second units which may be assembled end to end in either of two modes, namely, a first mode to protect the needle or a second mode as an operative syringe, the first unit comprising a barrel and needle assembly in which the barrel is open at one end and closed at the other end by a needle hub fixed to the barrel and in which the needle has one end fixed to the hub and communicating with the bore of the barrel and has the other end projecting from the hub for presentation to an injection site, the second unit comprising a combined needle protector, piston and piston rod having a body which is closed at one end and has a needle receiving recess entering the other end of the body, the closed end of the body having structure acting as a piston making sealing engagement with the bore of the barrel when the closed end of the body is inserted in the barrel, the other end of the body having means for releasably coupling it to the closed end of the barrel with the needle received in said recess, and in said first mode of assembly the body serving as a needle protector when coupled to the closed end of the barrel, in said second mode of assembly the closed end of the body being a piston making sealing engagement with the bore of the barrel when the closed end of the body is inserted in the barrel with the other end of the body remote from the closed end of the barrel and the body then being a piston rod for reciprocating the piston.
2. The syringe of claim 1 in which the first unit is a one piece barrel and hub.
3. The syringe of claim 1 in which the second unit is in one piece of flexible plastic.
4. The syringe of claim 3 in which the body has tubular walls between its ends with a loose sliding fit in the bore of the barrel.
5. The syringe of claim 4 in which the piston has an integral flange extending outward from said tubular walls at an acute angle toward the closed end of the body and has a non feathered edge contacting the bore of the barrel.
6. The syringe of claim 4 in which the piston has an external rib integral with the tubular walls and engaging the bore of the barrel.
US00075121A 1970-09-24 1970-09-24 Syringe Expired - Lifetime US3845762A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00075121A US3845762A (en) 1970-09-24 1970-09-24 Syringe
DE19712144692 DE2144692A1 (en) 1970-09-24 1971-09-02 Injection syringe
CA122,240A CA953594A (en) 1970-09-24 1971-09-07 Syringe
GB4240871A GB1312174A (en) 1970-09-24 1971-09-10 Syringe
FR7134101A FR2108404A5 (en) 1970-09-24 1971-09-22
IT53049/71A IT942191B (en) 1970-09-24 1971-09-23 IMPROVEMENT IN PLASTIC MATERIAL SYRINGES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00075121A US3845762A (en) 1970-09-24 1970-09-24 Syringe

Publications (1)

Publication Number Publication Date
US3845762A true US3845762A (en) 1974-11-05

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Application Number Title Priority Date Filing Date
US00075121A Expired - Lifetime US3845762A (en) 1970-09-24 1970-09-24 Syringe

Country Status (6)

Country Link
US (1) US3845762A (en)
CA (1) CA953594A (en)
DE (1) DE2144692A1 (en)
FR (1) FR2108404A5 (en)
GB (1) GB1312174A (en)
IT (1) IT942191B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213456A (en) * 1978-01-07 1980-07-22 Bottger Paul E K Medical multi-purpose instrument
CN100368032C (en) * 2005-06-28 2008-02-13 钱倚天 Safety shape destruction medical needle
US20160220008A1 (en) * 2013-09-13 2016-08-04 Yonwoo Co., Ltd. Syringe-type cosmetic container

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1285441C (en) * 1987-03-17 1991-07-02 Roy D. Mcnaughton Mcnaughton syringe shield type b
US4986820A (en) * 1989-06-23 1991-01-22 Ultradent Products, Inc. Syringe apparatus having improved plunger
IT1398458B1 (en) * 2010-02-25 2013-02-22 Brev Angela Srl MEDICAL NEEDLE FOR INJECTIONS, WITHDRAWALS AND / OR STAMPS

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959170A (en) * 1957-12-26 1960-11-08 Ernest S V Laub Hypodermic syringe
GB870669A (en) * 1958-12-16 1961-06-14 S & R J Everett & Co Ltd Improvements relating to hypodermic syringes
CH366126A (en) * 1959-03-17 1962-12-15 S E D A T Plastic seal for syringe plunger, and method of making same
GB919939A (en) * 1960-11-14 1963-02-27 Edgar Henry Wilburn Cartridge syringes
FR1333235A (en) * 1962-06-16 1963-07-26 One-piece plunging plastics molded plunger for single-use syringe
US3135261A (en) * 1961-09-21 1964-06-02 Theodore H Chamberlin Blood sampler
US3434468A (en) * 1962-11-28 1969-03-25 Abbott Lab Blood sampling device with cannula holder

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959170A (en) * 1957-12-26 1960-11-08 Ernest S V Laub Hypodermic syringe
GB870669A (en) * 1958-12-16 1961-06-14 S & R J Everett & Co Ltd Improvements relating to hypodermic syringes
CH366126A (en) * 1959-03-17 1962-12-15 S E D A T Plastic seal for syringe plunger, and method of making same
GB919939A (en) * 1960-11-14 1963-02-27 Edgar Henry Wilburn Cartridge syringes
US3135261A (en) * 1961-09-21 1964-06-02 Theodore H Chamberlin Blood sampler
FR1333235A (en) * 1962-06-16 1963-07-26 One-piece plunging plastics molded plunger for single-use syringe
US3434468A (en) * 1962-11-28 1969-03-25 Abbott Lab Blood sampling device with cannula holder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213456A (en) * 1978-01-07 1980-07-22 Bottger Paul E K Medical multi-purpose instrument
CN100368032C (en) * 2005-06-28 2008-02-13 钱倚天 Safety shape destruction medical needle
US20160220008A1 (en) * 2013-09-13 2016-08-04 Yonwoo Co., Ltd. Syringe-type cosmetic container
US10004315B2 (en) * 2013-09-13 2018-06-26 Yonwoo Co., Ltd. Syringe-type cosmetic container

Also Published As

Publication number Publication date
FR2108404A5 (en) 1972-05-19
DE2144692A1 (en) 1972-04-06
GB1312174A (en) 1973-04-04
IT942191B (en) 1973-03-20
CA953594A (en) 1974-08-27

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