CA2018200A1 - Safety hypodermic syringe - Google Patents

Safety hypodermic syringe

Info

Publication number
CA2018200A1
CA2018200A1 CA2018200A CA2018200A CA2018200A1 CA 2018200 A1 CA2018200 A1 CA 2018200A1 CA 2018200 A CA2018200 A CA 2018200A CA 2018200 A CA2018200 A CA 2018200A CA 2018200 A1 CA2018200 A1 CA 2018200A1
Authority
CA
Canada
Prior art keywords
pushed
hypodermic syringe
elastic element
hypodermic needle
safety hypodermic
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.)
Granted
Application number
CA2018200A
Other languages
French (fr)
Other versions
CA2018200C (en
Inventor
Chien-Hua Tsao
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2018200A1 publication Critical patent/CA2018200A1/en
Application granted granted Critical
Publication of CA2018200C publication Critical patent/CA2018200C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • 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
    • A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the 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
    • A61M5/50—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 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/508—Means for preventing re-use by disrupting the piston seal, e.g. by puncturing

Abstract

A safety hypodermic syringe includes a hypodermic needle 30 fixedly connected to holding means 34 and constantly supported by an elastic element 38 for making axial movement, which holding means 34 is normally retained by a clamping means 20 at a ready position for injection.
When a hollow plunger 50 is pushed to the front limit, the hypodermic needle 30 becomes released from the constraint of the clamping means 20 and pushed by the elastic element 38 to drop and to further follow a covering means 56 to be discarded and squeezed into the inner chamber 52 of the plunger 50 so as to isolate from outside and to prevent from pricking accident or possible body fluid contact.
CA002018200A 1989-08-14 1990-06-04 Safety hypodermic syringe Expired - Fee Related CA2018200C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/393,390 US5019044A (en) 1989-08-14 1989-08-14 Safety hypodermic syringe
US07/393,390 1989-08-14

Publications (2)

Publication Number Publication Date
CA2018200A1 true CA2018200A1 (en) 1991-02-14
CA2018200C CA2018200C (en) 1997-10-14

Family

ID=23554501

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002018200A Expired - Fee Related CA2018200C (en) 1989-08-14 1990-06-04 Safety hypodermic syringe

Country Status (9)

Country Link
US (1) US5019044A (en)
EP (1) EP0413414B1 (en)
CN (1) CN1049457A (en)
AT (1) ATE104558T1 (en)
AU (1) AU613836B2 (en)
CA (1) CA2018200C (en)
DE (1) DE69008273T2 (en)
DK (1) DK0413414T3 (en)
ES (1) ES2051472T3 (en)

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Also Published As

Publication number Publication date
US5019044A (en) 1991-05-28
ATE104558T1 (en) 1994-05-15
DK0413414T3 (en) 1994-07-18
DE69008273T2 (en) 1994-09-29
EP0413414A1 (en) 1991-02-20
CN1049457A (en) 1991-02-27
ES2051472T3 (en) 1994-06-16
DE69008273D1 (en) 1994-05-26
EP0413414B1 (en) 1994-04-20
AU613836B2 (en) 1991-08-08
AU5709790A (en) 1991-02-14
CA2018200C (en) 1997-10-14

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