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:
Jun. 15, 2004
Filed:
Oct. 26, 2001
Bernard Grehant, Nancy-sur-Cluses, FR;
Metabode Developpement et Conseil, Nancy-sur-Cluses, FR;
Abstract
A flux-switching linear motor with at least two phases P , P , P has a moving rig, two permanent magnets and a switching mechanism. The moving rig has at least two field coils . Each field coil surrounds a magnetic armature defining moving magnetic poles. The two permanent magnets are magnetized in opposite directions, transverse to the axis of a guidance stator tube . The stator tube has magnetic poles disposed along at least one of its walls so as to be successively facing the moving magnetic poles during the travel of the moving rig. The switching mechanism switches the direction of the current in the coils. The permanent magnets are disposed outside the coils and magnetized along an axis parallel to the axis of the coil. The stator magnetic poles include pieces made of magnetic material fixed in a guidance tube made of amagnetic material. The dimension of the magnets as measured along their magnetic axis is chosen so as to create narrow gaps to allow movement of the magnets past the stator poles.