Low friction syringe

Details Low friction syringe Low friction syringe

A - Human Necessities

61

M

128/83

A61M 5/315 (2006.01)

Patent

CA 1123696

PF-1387 LOW FRICTION SYRINGE ABSTRACT OF THE DISCLOSURE 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 per- mit free movement of the plug in the chamber under relatively low friction between the plug and the syringe barrel.

318780

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