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:
Dec. 04, 2012
Filed:
Aug. 25, 2009
Michael Rothenwaender, Lamprechtshausen, AT;
Christoph Kment, Vienna, AT;
Juergen Koelndorfer, Vienna, AT;
Wilhelm Brugger, Wals-Siezenheim, AT;
Michael Rothenwaender, Lamprechtshausen, AT;
Christoph Kment, Vienna, AT;
Juergen Koelndorfer, Vienna, AT;
Wilhelm Brugger, Wals-Siezenheim, AT;
W&H Dentalwerk Bürmoos GmbH, Bürmoos, AT;
Abstract
A fluid-operated medical or dental handle with a device for limiting the rotational speed to a maximum rotational speed value is disclosed. The handle comprises a rotating part that can be induced to rotation by a driving fluid for driving a tool connectable to the rotating part, an electrodynamic transducer driven by the rotating part for induction of an electric voltage, wherein the electrodynamic transducer has at least one coil and a magnetic element and at least one switch element for optional opening and closing of a circuit between the two ends of the at least one coil, so that with the circuit closed, an electric current and an induced magnetic field that decelerates the rotational speed of the rotating part and the tool connectable thereto can be induced in the coil of the electrodynamic transducer.