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GB870669A - Improvements relating to hypodermic syringes - Google Patents

Improvements relating to hypodermic syringes

Info

Publication number
GB870669A
GB870669A GB4057358A GB4057358A GB870669A GB 870669 A GB870669 A GB 870669A GB 4057358 A GB4057358 A GB 4057358A GB 4057358 A GB4057358 A GB 4057358A GB 870669 A GB870669 A GB 870669A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
piston
diameter
rod
ridges
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.)
Expired
Application number
GB4057358A
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 AND R J EVERETT AND CO Ltd
Original Assignee
S AND R J 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

Links

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
    • A61M5/31Details
    • 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

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.
GB4057358A 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes Expired GB870669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4057358A GB870669A (en) 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4057358A GB870669A (en) 1958-12-16 1958-12-16 Improvements relating to hypodermic syringes

Publications (1)

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

Family

ID=10415570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4057358A 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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