CONVERTIBLE PLUNGERS, FILM COATED PLUNGERS AND RELATED SYRINGE ASSEMBLIES

• Main Authors: GIRAUD, JEAN-PIERRE, ROGERS, JOSEPH W, MIMS, MICHAEL, J, PANGBORN, ROBERT J, SAGONA, PETER J, SOL, BERNARD, ABRAMS, ROBERT S
• Format: Patent
• Language: English; French; German
• Published: 17.08.2016
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

A convertible plunger is provided comprising an internal portion and a generally cylindrical exterior surface. At least a portion of the exterior surface is maintained in an initial expanded state by a property of the internal portion. The expanded state is reducible to a constricted state by an operation that is applied to the internal portion of the plunger to alter the property. A film coating may also be applied to a sidewall of the sleeve to reduce a sliding friction between the sleeve and barrel. A film coating may also be applied to a nose cone of the plunger to provide a barrier between the plunger and product in the barrel.