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. 09, 2006
Filed:
Feb. 28, 2003
David Walraet, Saint-Germain en Laye, FR;
David Walraet, Saint-Germain en Laye, FR;
Valeo Systems de Controle Moteur, Osny, FR;
Abstract
The invention relates to an electromagnetic actuator comprising an actuator member () connected to an armature () which is movable under drive from a drive member comprising at least one coil () for generating magnetic flux in a core () having a face facing a face of the armature (), at least one of the facing faces including at least one set-back portion (), the armature () and the core () being arranged, in a first zone () of the armature () and of the core () including the set-back portion, to define a first magnetic path which is interrupted by an air gap that is not less than the setback of the set-back portion () when the armature () bears against the core (), and in a second zone () of the armature () and of the core () excluding the set-back portion, to define a second magnetic path which is interrupted solely by a residual air gap when the armature () bears against the core (), the total area of the set-back portion being no greater than an area that would bring the magnetic flux to saturation in the second zone of the armature.