US Patent 11925791 Syringe plunger with hinged flange

A plunger for movably mounting within a cavity or barrel of a syringe. The plunger includes a contact face having a flange movably mounted thereto, wherein the flange is movable between an open configuration wherein an opening is formed between the flange and a portion of the plunger, the opening configured for engagement with an IV hook or other engagement member, and a closed configuration wherein the upper surfaces of the contact face and the flange are generally planar with one another.