GB870669A - Improvements relating to hypodermic syringes - Google Patents

Improvements relating to hypodermic syringes

Info

Publication number
GB870669A
GB870669A GB40573/58A GB4057358A GB870669A GB 870669 A GB870669 A GB 870669A GB 40573/58 A GB40573/58 A GB 40573/58A GB 4057358 A GB4057358 A GB 4057358A GB 870669 A GB870669 A GB 870669A
Authority
GB
United Kingdom
Prior art keywords
piston
diameter
rod
dec
face
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
GB40573/58A
Inventor
Samuel James Everett
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.)
S&RJ Everett and Co Ltd
Original Assignee
S&RJ Everett and Co Ltd
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 S&RJ Everett and Co Ltd filed Critical S&RJ Everett and Co Ltd
Priority to GB40573/58A priority Critical patent/GB870669A/en
Publication of GB870669A publication Critical patent/GB870669A/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
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding

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

870,669. Hypodermic syringes. EVERETT & CO. Ltd., S., and R. J. Dec. 8, 1959 [Dec. 16, 1958], No. 40573/58. Class 81 (2). A unitary piston and piston rod for an hypodermic syringe is moulded from synthetic plastic, e.g. polythene, and has an internal bore 6 open at the rear end and a piston 4 which has two or more spaced annular ridges 11, 12 and is slightly larger in diameter than the rod 5, there being a neck 7 of reduced diameter between the piston and the piston rod. Two annular ridges may be provided, each ridge having a face 13, 16 perpendicular to the piston axis and a face 14, 15 which slopes at an angle to the piston axis, the perpendicular faces being on opposite sides of the ridges. The piston is made over-size and is sized by placing in a forming tube, or a glass or acrylic resin syringe barrel of slightly smaller diameter, and heating at 40‹ C. until its diameter conforms to that of the tube or barrel.
GB40573/58A 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes Expired GB870669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB40573/58A GB870669A (en) 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB40573/58A GB870669A (en) 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes

Publications (1)

Publication Number Publication Date
GB870669A true GB870669A (en) 1961-06-14

Family

ID=10415570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40573/58A Expired GB870669A (en) 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes

Country Status (1)

Country Link
GB (1) GB870669A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845762A (en) * 1970-09-24 1974-11-05 Nesco Plastics Inc Syringe
US3930492A (en) * 1974-08-21 1976-01-06 Jintan Terumo Company, Ltd. Air-noncontact type blood sampling assembly
US5397313A (en) * 1994-01-27 1995-03-14 The Kendall Company Low friction syringe
WO2008064283A2 (en) * 2006-11-24 2008-05-29 3M Innovative Properties Company Piston, and handheld dispenser including a piston

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845762A (en) * 1970-09-24 1974-11-05 Nesco Plastics Inc Syringe
US3930492A (en) * 1974-08-21 1976-01-06 Jintan Terumo Company, Ltd. Air-noncontact type blood sampling assembly
US5397313A (en) * 1994-01-27 1995-03-14 The Kendall Company Low friction syringe
WO2008064283A2 (en) * 2006-11-24 2008-05-29 3M Innovative Properties Company Piston, and handheld dispenser including a piston
WO2008064283A3 (en) * 2006-11-24 2009-03-05 3M Innovative Properties Co Piston, and handheld dispenser including a piston

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