Syringe having two component barrel

Details Syringe having two component barrel Syringe having two component barrel

1992-07-21

1994-08-16

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604227, 604110, A61M 500

Patent

active

053383095

ABSTRACT:
A syringe assembly comprising a barrel having a hollow cylindrical shaped body. The body has a proximal first portion with an adjacent second portion which includes a circumferential groove for mounting a finger flange. The barrel has a third portion adjacent to the second portion. The body has a distal tip with a passage therethrough for mounting a needle in fluid communication with the bore. The finger flange has an opening with a diameter defined by a plurality of inwardly facing cantilevers. The diameter of the flange opening is less than that of the body first portion and third portion, requiring a deflection of the cantilevers when the flange is moved over the first portion to the second portion by an installation force. The flange is retained by the barrel through interaction between the inwardly facing cantilevers and the circumferential groove. The design of the cantilevers and the barrel proximal first and second portions provides that a force for removal of the finger flange is greater than the installation force.

REFERENCES:
patent: 2047512 (1939-07-01), Kauffman
patent: 2678647 (1954-05-01), Bruger
patent: 3987990 (1976-10-01), Tischlinger
patent: 4068661 (1978-01-01), Hennings
patent: 4840616 (1989-06-01), Banks
patent: 4878903 (1989-11-01), Mueller
patent: 4909788 (1990-03-01), Egolf

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