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:
Sep. 15, 2009
Filed:
Mar. 04, 2003
Pierre Gandel, Montfaucon, FR;
Daniel Prudham, Thise, FR;
Jean-daniel Alzingre, Larnod, FR;
Antoine Foucaut, Montarlot les Rioz, FR;
Pierre Gandel, Montfaucon, FR;
Daniel Prudham, Thise, FR;
Jean-Daniel Alzingre, Larnod, FR;
Antoine Foucaut, Montarlot les Rioz, FR;
Moving Magnet Technologies, M.M.T., Besancon, FR;
Abstract
A linear actuator includes a brushless polyphase synchronous electric motor having a stator and a rotor. The rotor acts on a control element via a driver which can transform the rotation movement thereof into a linear movement over several rotations. Preferably, the inventive actuator comprises elastic and/or magnetic return device which can systematically return the control element to a reference position when the power supply to the motor is cut. The motor has a position detection device which, together with an electronic control unit, is used for the automatic control and regulation of the position of the rotor and, therefore, the control element.