GB874876A - Improvements in injection syringes - Google Patents

Improvements in injection syringes

Info

Publication number
GB874876A
GB874876A GB7293/60A GB729360A GB874876A GB 874876 A GB874876 A GB 874876A GB 7293/60 A GB7293/60 A GB 7293/60A GB 729360 A GB729360 A GB 729360A GB 874876 A GB874876 A GB 874876A
Authority
GB
United Kingdom
Prior art keywords
plunger
recess
end cap
air
syringe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7293/60A
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 GB874876A publication Critical patent/GB874876A/en
Expired 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • 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
    • A61M5/31505—Integral with the syringe barrel, i.e. connected to the barrel so as to make up a single complete piece or unit

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

874,876. Surgical syringes. ESCHMANN, M. March 1, 1960 [July 29, 1959], No. 7293/60. Class 81 (2). The plunger rod of a syringe is fitted with a valve device which restricts the escape of air as the plunger is retracted, so as to prevent the rapid retraction of the plunger, which might break the end cap of the syringe. The valve member 5 consists of a resilient sleeve having a radial flange 5a, which is received in recess 2b in the end cap 2. The upper face of this recess is planar so that the flange seats against it when the plunger rod 3 is drawn backwards and air can only escape from the enclosed space slowly. The lower face 2d of the recess is non-planar so that air can pass freely when the plunger is pressed downwards and its movement is unrestricted. The extension 5b of the valve member beyond the lower face of the end cap additionally serves as a resilient buffer against which the piston abuts when fully retracted.
GB7293/60A 1959-07-29 1960-03-01 Improvements in injection syringes Expired GB874876A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH874876X 1959-07-29

Publications (1)

Publication Number Publication Date
GB874876A true GB874876A (en) 1961-08-10

Family

ID=4544315

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7293/60A Expired GB874876A (en) 1959-07-29 1960-03-01 Improvements in injection syringes

Country Status (1)

Country Link
GB (1) GB874876A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522506A1 (en) * 1982-01-27 1983-09-09 Biotherax Lab Two-stage syringe for rectal injections - opt. has barrel and piston moulded from different materials
WO1991004065A1 (en) * 1989-09-18 1991-04-04 Assumpsit No. 102 Pty. Ltd. Syringe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522506A1 (en) * 1982-01-27 1983-09-09 Biotherax Lab Two-stage syringe for rectal injections - opt. has barrel and piston moulded from different materials
WO1991004065A1 (en) * 1989-09-18 1991-04-04 Assumpsit No. 102 Pty. Ltd. Syringe
US5215533A (en) * 1989-09-18 1993-06-01 Robb Pascal Patent Pty. Ltd. Safety syringe incorporating vacuum retraction of the needle

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