Low friction syringe

Details Low friction syringe Low friction syringe

1979-06-29

1981-05-12

Yasko, John D.

Surgery

Truss

Pad

128218P, A61B 514

Patent

active

042665574

ABSTRACT:
A low friction syringe comprising, a barrel defining a chamber, a plunger having a distal end received in the barrel chamber, and a plug of elastic material having a body portion secured to the distal end of the plunger. The plug has first and second annular flanges respectively extending forwardly and rearwardly from the body portion. The first and second flanges have an enlarged outer annular lip lightly contacting an inner surface of the barrel, and an annular hinge portion adjacent the body portion to permit flexation of the flanges responsive to differential pressures between a cavity intermediate the flanges and either the chamber or the atmosphere. The flanges also permit free movement of the plug in the chamber under relatively low friction between the plug and the syringe barrel.

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