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：US20180085191A1

公开(公告)日：2018-03-29

申请号：US15710860

申请日：2017-09-21

Applicant: DENTSPLY SIRONA Inc.

Inventor： Metin ERTUGRUL

IPC: A61C1/16

Abstract: The invention relates to a handpiece head (1) comprising a housing (2) and a closing cap (3), wherein the housing (2) is releasably connected to the closing cap (3) by means of a screw connection (4). The closing cap (3) comprises at least one recess (8) or at least one elevation (7), wherein the housing (2) correspondingly comprises at least one elevation (7) or at least one recess (8). When the closing cap (3) is screwed in, the elevation (7) on the housing (2) engages in the corresponding recess (8) on the closing cap (3) or the elevation (7) on the closing cap (3) engages in the corresponding recess (8) on the housing (2), so that an inadvertent release of the closing cap from the housing (2) as a result of vibrations of the handpiece head (1) is prevented by the engagement.

公开(公告)号：US20210205048A1

公开(公告)日：2021-07-08

申请号：US17142378

申请日：2021-01-06

Applicant: DENTSPLY SIRONA inc.

Inventor： Metin ERTUGRUL

IPC: A61C1/18

Abstract: The invention relates to a dental instrument, comprising a gearing for driving a tool, wherein at least one torque limiting device is provided, which can be brought into contact with the gearing, as a result of which the maximum acting torque in the gearing can be limited.

公开(公告)号：US20190029774A1

公开(公告)日：2019-01-31

申请号：US16031204

申请日：2018-07-10

Applicant: DENTSPLY SIRONA inc.

Inventor： Metin ERTUGRUL ,  Stefan GOBEL

IPC: A61C1/12 ,  A61C1/18

Abstract: Dental hand piece, comprising a housing and a drive train with a coupling element for a drive, wherein the housing radially surrounds the drive train and wherein the housing has a first and a second housing end, and wherein the housing is held on the drive train on the first and on the second housing end. Between the first housing end and the coupling element is arranged a decoupling element, which is strictly springy or springy and damping in the axial direction, whereas the second housing end is braced rigidly against the drive train and the housing is braced with respect to the coupling element in the axial direction by means of the decoupling element.

公开(公告)号：US20180355914A1

公开(公告)日：2018-12-13

申请号：US16002037

申请日：2018-06-07

Applicant: DENTSPLY SIRONA inc.

Inventor： Metin ERTUGRUL ,  Matthias Rein ,  Jan-Paul Gerlach ,  Ralph Sutter

IPC: F16C19/16 ,  F16C33/66 ,  A61C1/12 ,  A61C1/18

CPC classification number: A61C1/12 ,  A61C1/06

Abstract: A dental hand piece or angle piece including a rotating tool, which is driven via a rotating drive element disposed in a housing, wherein the rotating drive element is mounted in the housing by a radial rolling bearing, wherein the rolling bearing comprises an axial abutment surface and the housing comprises an axial countersurface, and wherein the rolling bearing is axially preloaded with respect to the housing by a spring element 11 and has a coefficient of friction for the static friction of the abutment surface to the countersurface or the abutment surface and the countersurface to the spring element that is at least 0.16 in the lubricated state and at least 0.25 in the unlubricated state.

公开(公告)号：US20220079710A1

公开(公告)日：2022-03-17

申请号：US17299422

申请日：2019-12-05

Applicant: DENTSPLY SIRONA INC.

Inventor： Metin ERTUGRUL ,  Matthias REIN

IPC: A61C1/14

Abstract: The invention relates to a dental handpiece with a manually operable push button for actuating the trigger mechanism, wherein the push button is double-walled with an outer cover plate and an inner contact element, wherein for actuating the push button an upper side of the outer cover plate is pressable by a user against a bias, thereby actuating an actuator by an underside of the inner contact element to actuate the trigger mechanism, wherein a thermal insulation layer extends between the outer cover plate and the inner contact element which causes a thermal decoupling of the outer cover plate from the inner contact element.

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).