Dual chamber syringe and methods of use thereof

Inventors

Benarous, Nir • Carmel, Ehoud • Raday, Lior • Daily, David • Keenan, Guy

Assignees

Dali Medical Devices Ltd

Abstract

A dual chamber syringe, comprising a syringe barrel having a forward end, a rearward end and at least one bypass protrusion arranged along the longitudinal extent of the syringe barrel; a finger grip element coupled to the rearward end of the syringe barrel, the finger grip comprises at least one protrusion extending radially inwardly from an inner surface thereof; a plunger rod operatively coupled with the finger grip element; a guiding track is formed on the plunger rod and comprises a helical track portion and a longitudinal track portion; and wherein upon relative displacement of the plunger rod and said finger grip element, the at least one protrusion is guided along the guiding track.

Core Innovation

The invention relates to a dual chamber syringe for reconstitution and injection, including a syringe barrel with a forward end, a rearward end and at least one bypass protrusion arranged along a longitudinal extent of the syringe barrel. The bypass protrusion arrangement supports operation of the dual chamber syringe during relative displacement between a plunger rod and a finger grip element, coordinated through engagement features in the syringe.

The syringe further includes a finger grip element coupled to the rearward end of the syringe barrel. The finger grip element comprises an inner threaded portion on an inner surface of the finger grip element and a rearward edge having at least one helical portion, so that the helical portion is adapted to cooperate during guided relative displacement.

A plunger rod is operatively coupled with the finger grip element and comprises at least one threaded portion formed on an outer surface of the plunger rod and at least one guiding rib rearwardly spaced from the at least one threaded portion. Following relative displacement guided by engagement between the at least one threaded portion and the inner threaded portion, the guiding rib is adapted to engage the at least one helical portion of the rearward edge, thereby producing a controlled transition in the guided motion of the plunger rod relative to the finger grip element.

Claims Coverage

The patent document provided includes one independent claim: clm-00001. The dependent claims referenced refine the core guiding and rotational behavior using guiding grooves, opposite-direction prevention, helical-edge slope constraints, and thread pitch/direction relationships across interfaces.

Across the provided claim set, the independent claim defines the fundamental combination of bypass protrusion, an inner threaded portion, a rearward edge with helical portion, and a plunger rod with a threaded portion and a guiding rib configured for engagement, with dependent claims further specifying groove/guiding interactions, opposite-direction rotational prevention, geometric slope relationships, and pitch/direction differences for threaded interfaces.

Stated Advantages

Documented Applications

No documented applications found