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. 31, 2017
Filed:
Jul. 17, 2013
Sirona Dental Systems Gmbh, Bensheim, DE;
Matthias Rein, Lorsch, DE;
Siegfried Goisser, Einhausen, DE;
Metin Ertugrul, Rodermark, DE;
Ralf Sutter, Weinheim, DE;
Alexander Muhlbeyer, Neu Ulm, DE;
SIRONA DENTAL SYSTEMS GmbH, Bensheim, DE;
Abstract
A dentists' preparation instrument () comprises a turbine () for driving a tool () using compressed air, and a rotor () that is arranged in a turbine compartment (), rotates about a longitudinal axis (), and has blades () extending to a face () of the rotor (). The turbine compartment () has a discharge port () for the compressed air towards a returning air duct (). Said discharge port () is disposed in such a way that both the face () of the rotor () and parts of the blades () sweep past the discharge port () as the rotor rotates about the longitudinal axis (). For deceleration purposes, the rotor () has a deceleration contour () on the face (), said deceleration contour being formed by projections (), and the turbine compartment () has a deceleration contour chamber () inside which the deceleration contour () is accommodated. The discharge port () in part also extends across the deceleration contour chamber ().