Patent ID: 9579257
Date: 2017-02-28
CPC Classifications: A61J,A61M

Claim:
1. A haptic and audible feedback syringe, comprising: a barrel member defining an interior volume therein for receiving fluid for dispensing from the syringe in a dispensing operation, the interior volume being bounded by interior wall surface with an inwardly extending, circumferentially continuous protrusion element on the interior wall surface at a proximal portion of the barrel member; and a plunger configured for slidable engagement in the interior volume of the barrel member, wherein the plunger comprises a central longitudinally extending plunger spine to which are secured top and bottom side rails, the top and bottom side rails forming with the spine recesses on either side of the spine in each of which is disposed an array of deformable flexible resilient finger elements secured to the spine and in sequential longitudinally spaced-apart arrangement along a length of the plunger, the finger elements extending outwardly, perpendicular to a longitudinal axis of the plunger; wherein the protrusion element and finger elements are dimensionally sized and positioned in relation to one another so that advancement of the plunger in the barrel member interior volume from a retracted position successively engages the finger elements with the protrusion so that contact resistance is transmitted by the plunger to a syringe user as a haptic feedback in initial contact of the finger elements and protrusion, with elastic deformation of the finger elements by the protrusion during subsequent advancement of the plunger and production of an audible output upon disengagement of the finger elements from the protrusion during such advancement.