Single use hypodermic syringe

Details Single use hypodermic syringe Single use hypodermic syringe

1990-03-15

1990-12-25

Pellegrino, Stephen C.

Surgery

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

Treating material introduced into or removed from body...

604208, A61M 500

Patent

active

049799436

ABSTRACT:
A single use hypodermic syringe is provided and has a reversible stop member which permits movement of the plug in one direction but not in the opposite direction so that the plug may be moved in the direction to aspirate fluid in the hypodermic syringe during which the reversing member moves into a reversing chamber so that it may be reversed to permit movement of the plug to eject fluid from the hypodermic syringe but to prevent movement of the plug in the opposite direction after the ejection of fluid has been commenced and after all of the fluid has been ejected.

REFERENCES:
patent: 4391272 (1983-07-01), Staempfli
patent: 4493703 (1985-01-01), Butterfield
patent: 4731068 (1988-03-01), Hesse
patent: 4781684 (1988-11-01), Trenner

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