The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2025
Filed:
Nov. 27, 2019
Dentsply Sirona Inc., York, PA (US);
Dentsply Sirona Inc., York, PA (US);
Abstract
The invention relates to a rotor () having a turbine wheel () driven by propellant (TG) in a turbine housing (), a dental preparation instrument () having such a rotor () and a method () for operating such a preparation instrument (), wherein at least one part of the propellant (TG) flows back to the gas outlet opening () in an inner wall () radially orbiting the turbine wheel () through a return flow channel () after impinging on at least one of the drive blades () of the turbine wheel () counter to the direction of rotation (DR) of the turbine wheel (), the inner wall () in the segment of a circle (KS) comprises at least one return flow channel () extending at least from the gas inlet opening () as far as the gas outlet opening (), which allows at least one part of the propellant (TG) to flow back to the gas outlet opening () through the return flow channel () after impinging on at least one of the drive blades () counter to the direction of rotation (DR) of the turbine wheel (), wherein, in axial direction (AR), the turbine housing () has at least one cross-sectional extension () of a surface between drive blades () and inner wall () as far as the return flow channel ().