SYRINGE WITH COLLAPSIBLE MEMBRANE Russian patent published in 2020 - IPC A61B5/15 

FIELD: medicine.

SUBSTANCE: syringe comprises: a proximal end having an end wall for engagement with the piston, wherein the proximal end has a radius-curved bend, and wherein at least a portion of the end wall has a non-uniform thickness; a distal end having an open outlet neck; a sidewall extending between the proximal end and the distal end along the longitudinal axis; and an engaging portion with a piston protruding proximally from the central end wall part and configured to engage with the fluid injector piston, wherein the engagement portion with the piston has a rod with a first end attached to the end wall and a second end extending proximally from the first end. Besides, the side wall is flexible and turned under action of the piston, so that the external surface of the side wall is bent in the direction radially inwards when the piston moves from the proximal end to the distal end.

EFFECT: invention refers to medical equipment, namely to syringes with turning membrane for receiving medical fluid.

18 cl, 12 dwg