Patent ID: 9662180
Date: 2017-05-30
CPC Classifications: A61C,F04C

Claim:
1. A device for dispensing a dental material comprising a nozzle head, a hand piece and a locking mechanism for locking the nozzle head and the hand piece, wherein the locking mechanism comprises: a snap connection and a screw connection; the locking mechanism being operable between: a locked position in which the snap connection is engaged for retaining the nozzle head and the hand piece with each other and in which the screw connection is disengaged; a secured position in which the snap connection is disengaged and in which the screw connection is engaged for retaining the nozzle head and the hand piece with each other; and a released position in which the snap connection and the screw connection are disengaged; wherein the snap connection comprises a retaining device for axially retaining the nozzle head to the hand piece, and the screw connection comprises a stopper element to prevent separation of the nozzle head from the hand piece; wherein the retaining device comprises a ring shaped protrusion on the hand piece and a ring shaped depression on the nozzle head, wherein the ring shaped protrusion engages the ring shaped depression in the locked position; and wherein the stopper element comprises a first thread on the nozzle head and at least one pin or at least one second thread on the hand piece, wherein the first thread and the pin or the second thread are engaged to retain the nozzle head and the hand piece with each other in the secured position.