Patent ID: 9387052
Filing Date: 2016-07-12
CPC Classification: A61C,A61M

Claim Text:
1. An application device comprising: a cylindrical body for storing a squeezable dental material; a piston positioned inside the cylindrical body and axially displaceable towards the cylindrical body; a piston rod serving to displace the piston in a squeezing direction, wherein the piston rod extends into the piston and is axially displaceable towards the piston; an elastic resetting device at a front end area of the piston and positioned in the direction towards the dental material, wherein the elastic resetting device is adaptable to be biased in the squeezing direction and to return back to a relaxed position after the end of each axial movement of the piston in the squeezing direction and release of the pressure exerted on the piston rod for this purpose, preventing dripping of excess dental material from the application device by creating a partial vacuum inside the cylindrical body, with the elastic resetting device pressing the piston rod in a direction opposite the squeezing direction; a stop positioned on the piston rod and facing the squeezing direction, wherein the stop is positioned at a spatial distance from the resetting device; wherein the bias in the resetting device is limited by the stop on the piston rod when the piston rod is actuated in the squeezing direction, wherein in the relaxed position of the resetting device, the piston rod contacts a contact area of the resetting device, the contact area pointing in an opposite direction to the squeezing direction, and a counterstop of the piston is positioned at a distance from the respective stop of the piston rod, the distance corresponding to the maximum bias of the resetting device, wherein the piston comprises the elastic resetting device and a piston body, wherein the elastic resetting device is a separate element from the piston body and encloses the piston body and is firmly connected to the piston body and the elastic resetting device is made of a material that is softer and more elastic than the piston body, wherein the elastic resetting device is never in contact with the cylindrical body.