Zahnärztliches Handstück mit einem Spannfutter mit Integrierter Kolbenkugel

Details

Veröffentlichungs-Nr.

EP4311516

Aktenzeichen

EP22187241

Anmeldetag

27. Juli 2022

Veröffentlichung

10. September 2025

Erteilung

10. September 2025

Rechtsraum

EP

IPC

A61C1/14A61B17/16

Abstract

The present invention relates to a dental handpiece (1) comprising: a dental handpiece (1) comprising: a head (4); a rotatable hollow shaft (15) which is rotatably arranged inside the head (4); a driving means for rotating the hollow shaft (15); a chuck (26) having resilient arms (27) for releasably clamping a dental drill (2), wherein the chuck (26) is fixed into the hollow shaft (15) so as to rotate with same; a ball (14) which is axially movably arranged inside the rotatable hollow shaft (15) and in direct contact with the resilient arms (27) of the chuck (26), wherein the ball (14) partly protrudes through an opening (17) on the upper end of the hollow shaft (15), and wherein the opening (17) is smaller than the size of the ball (14); a push button (7) which is arranged in the head (4) and configured to contact, when pressed by a user, the partly protruding ball (14) and move the ball (14) downwardly in between the resilient arms (27) so as flex the resilient arms (27) radially outwards and release the dental drill (2), wherein the resilient arms (27) bias the ball (14) inside the rotatable hollow shaft (15) towards the opening (17); and a biasing means to move the push button (7) away from the ball (14), wherein the push button (7) is not in contact with the ball (15) when it is released.

Anmelder

Firmen

Dentsply Sirona Inc.
Sirona Dental Systems GmbH

Land

🇺🇸 USA

Fachgebiete