Title:
歯科用準備器具におけるロータのための逆流ブレーキ
Document Type and Number:
Japanese Patent JP7413374
Kind Code:
B2
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).
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Inventors:
Goiser, Siegfried
Goebel, Stephane
Elts Gruul, Metin
Goebel, Stephane
Elts Gruul, Metin
Application Number:
JP2021523693A
Publication Date:
January 15, 2024
Filing Date:
November 27, 2019
Export Citation:
Assignee:
Dentsply Sirona Incorporated
Sirona Dental Systems Game Behr
Sirona Dental Systems Game Behr
International Classes:
A61C1/05
Domestic Patent References:
| JP2016506806A |
Foreign References:
| US20150173851 | ||||
| US20150164613 |
Attorney, Agent or Firm:
Patent Attorney Corporation Suzue Patent General Office
Masatoshi Kurata
Nobuhisa Nogawa
Tadashi Inoue
Shigeru Iino
Ikuji Otaku
Naoki Kawano
Sanae Kaneko
Masatoshi Kurata
Nobuhisa Nogawa
Tadashi Inoue
Shigeru Iino
Ikuji Otaku
Naoki Kawano
Sanae Kaneko
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