公开(公告)号：US20220008162A1

公开(公告)日：2022-01-13

申请号：US17297511

申请日：2019-11-27

Applicant: DENTSPLY SIRONA INC.

Inventor： Siegfried GOISSER ,  Stefan GÖBEL ,  Metin ERTUGRUL

IPC: A61C1/05

Abstract: The invention relates to a rotor (1) having a turbine wheel (3) driven by propellant (TG) in a turbine housing (2), a dental preparation instrument (20) having such a rotor (1) and a method (100) for operating such a preparation instrument (20), wherein at least one part of the propellant (TG) flows back to the gas outlet opening (51) in an inner wall (21) radially orbiting the turbine wheel (3) through a return flow channel (6) after impinging on at least one of the drive blades (31) of the turbine wheel (3) counter to the direction of rotation (DR) of the turbine wheel (3), the inner wall (21) in the segment of a circle (KS) comprises at least one return flow channel (6) extending at least from the gas inlet opening (41) as far as the gas outlet opening (51), which allows at least one part of the propellant (TG) to flow back to the gas outlet opening (51) through the return flow channel (6) after impinging on at least one of the drive blades (31) counter to the direction of rotation (DR) of the turbine wheel (3), wherein, in axial direction (AR), the turbine housing (2) has at least one cross-sectional extension (8) of a surface between drive blades (31) and inner wall (21) as far as the return flow channel (6).

公开(公告)号：US20210393369A1

公开(公告)日：2021-12-23

申请号：US17292823

申请日：2019-11-13

Applicant: DENTSPLY SIRONA INC. ,  SIRONA DENTAL SYSTEMS GMBH

Inventor： Siegfried GOISSER ,  Stefan GÖBEL

IPC: A61C1/05 ,  A61C1/18

Abstract: A dental turbine driven by pressurized air comprises a head housing (1) with a turbine chamber (2) and a rotor shaft (3) mounted using an anti-friction bearing (8a) with a non-rotatably mounted turbine wheel (13). The outer race (10a) of the anti-friction bearing (8a) extends into the turbine chamber (2) in axial direction. The turbine wheel (13) comprises an annular web (16a) that is arranged concentrically to the outer race (10a) of the anti-friction bearing (8a) and, together with the outer race (10a), forms a gap seal (17a). This gap seal (17a) extends in axial direction between outer race (10a) and annular web (16a) and prevents the sucking-in of liquids and dirt particles into the turbine chamber (2) during inertial rotation of the turbine wheel (13).

公开(公告)号：US20200054418A1

公开(公告)日：2020-02-20

申请号：US16461396

申请日：2017-11-23

Applicant: DENTSPLY SIRONA inc.

Inventor： Siegfried GOISSER

IPC: A61C1/05 ,  A61C1/12

Abstract: Flow-driven dental instrument (1), comprising a grip part (2), a head part (3), a media line (4), and a fastening means (8), wherein the grip part (2) is constructed in the form of a sleeve with two ends and a media connection (5) is disposed on the first end. At the second end, the head part (3) projects at least partially into the grip part (2). A first end of the media line (4) is connected to the head part (3) and the media line (4) extends from the head part (3) through the grip part (2) to the media connection (5). The fastening means (8) comprises a sleeve (9) having an external thread and a nut (10) having an internal thread, wherein the sleeve (9) is connected to the outer wall of the media line (4) in a material-locking manner and, at least in a direction toward the head part (3), the nut is held in the grip part (2) in a fixed position.

公开(公告)号：US20220409332A1

公开(公告)日：2022-12-29

申请号：US17903558

申请日：2022-09-06

Applicant: DENTSPLY SIRONA Inc.

Inventor： Siegfried GOISSER

IPC: A61C1/05 ,  A61C1/12

Abstract: Flow-driven dental instrument (1), comprising a grip part (2), a head part (3), a media line (4), and a fastening means (8), wherein the grip part (2) is constructed in the form of a sleeve with two ends and a media connection (5) is disposed on the first end. At the second end, the head part (3) projects at least partially into the grip part (2). A first end of the media line (4) is connected to the head part (3) and the media line (4) extends from the head part (3) through the grip part (2) to the media connection (5). The fastening means (8) comprises a sleeve (9) having an external thread and a nut (10) having an internal thread, wherein the sleeve (9) is connected to the outer wall of the media line (4) in a material-locking manner and, at least in a direction toward the head part (3), the nut is held in the grip part (2) in a fixed position.

公开(公告)号：US20180132971A1

公开(公告)日：2018-05-17

申请号：US15566226

申请日：2016-04-18

Applicant: DENTSPLY SIRONA inc.

Inventor： Metin ERTUGRUL ,  Siegfried GOISSER ,  Stefan GOBEL

IPC: A61C1/14 ,  A61B17/16 ,  B23B31/117 ,  B23B31/20

Abstract: The invention relates to a clamping device (1) for clamping a cylindrical instrument shank, in particular, a dental instrument, said clamping device comprising a spring-loaded element (2) for holding the instrument shank, a hollow shaft (3) for transmitting a rotational movement, and a plunger, wherein the spring-loaded element (2) is designed as a sleeve with a cylindrical wall, a first opening (6) and a second opening (7); and the wall has cut-outs (8). The spring-loaded element (2), the shaft (3) and the plunger (4) have axes of rotation that are arranged coaxially; the shaft (3) protrudes at least partially into the first opening (6) of the spring-loaded element (2); and the plunger (4) protrudes at least partially into the second opening (7) of the spring-loaded element (2).