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:
May. 19, 2009
Filed:
May. 27, 2004
Richard Kardeis, Burmoos, AT;
Roland Sevcik, Bad Reichenhall, DE;
Johann Eibl, Mattighofen, AT;
Rainer Schröck, Lamprechtshausen, AT;
Harald Schörghofer, Bergheim, AT;
Rainer Mackinger, Ostermiething, AT;
Wolfgang Wendtner, Lamprechtshausen, AT;
Dieter Köbel, Laufen, DE;
Richard Kardeis, Burmoos, AT;
Roland Sevcik, Bad Reichenhall, DE;
Johann Eibl, Mattighofen, AT;
Rainer Schröck, Lamprechtshausen, AT;
Harald Schörghofer, Bergheim, AT;
Rainer Mackinger, Ostermiething, AT;
Wolfgang Wendtner, Lamprechtshausen, AT;
Dieter Köbel, Laufen, DE;
W&H Dentalwerk Burmoos GmbH, Burmoos, AT;
Abstract
A brushless electric motor which has a rotor magnet, a coil apparatus for electromagnetically driving the rotor magnet, a rotor shaft for transmitting a rotary movement, which is firmly connected to the rotor magnet and runs through a rotation axis of the rotor magnet, and at least one electromagnetic transducer element for detection of the magnetic field of the rotor magnet, in which the at least one electromagnetic transducer element is arranged outside the axial extent of the rotor magnet with respect to the rotation axis, and is arranged essentially within the maximum radial extent of the rotor magnet. The invention also relates to an instrument for a medical, in particular a dental, apparatus having a brushless electric motor such as this.