SYRINGE SYSTEM AND PISTON DEVICE Russian patent published in 2017 - IPC A61M5/315 

FIELD: medicine.

SUBSTANCE: syringe system contains a syringe body and a limiter. The syringe body comprises a hollow cavity, a proximal open end and a distal end. The syringe body is configured to contain liquid. The limiter is located in the hollow cavity of the syringe body and forms a seal with the inner wall of the syringe body. The limiter is configured to slide within the hollow cavity to facilitate movement of fluid within the syringe body. The limiter comprises a base and one or more gripping elements extending in a backward direction from the base. At that, one or more gripping elements, each, contains a chamfered edge. The chamfered edge is configured to interact with the plunger of the fluid delivery device to deflect one or more gripping elements in the radial direction when the limiter rotates relative to the plunger to facilitate limiter removal from the plunger. The piston device includes a limiter configured to slide within the hollow cavity of the syringe to facilitate fluid movement within the syringe. The limiter comprises a base and one or more gripping elements extending in a backward direction from the base. At that, one or more gripping elements, each, contains a chamfered edge. The chamfered edge is configured to interact with the plunger of the fluid delivery device to deflect one or more gripping elements in the radial direction when the limiter rotates relative to the plunger to facilitate limiter removal from the plunger.

EFFECT: inventions provide simple detachment and attachment of a syringe plunger part to the limiter part using a connector, which allows the same injector to be used for a variety of other syringes; in addition, the inventions provide a quick and simple solution for health care providers, since the plunger can be inserted and connected to the limiter without special orientation.

24 cl, 11 dwg