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:
Feb. 14, 2012
Filed:
Jan. 13, 2010
Takashi Mamba, Kitakyushu, JP;
Hiroshi Nakamura, Kitakyushu, JP;
Wennong Zhang, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A magnetic levitation system includes a levitation-actuator movable element which generates a levitation force applied to a control object; and a levitation-actuator stator which receives a reactive force while the control object is being operated, the levitation-actuator stator being attached to a fixed or movable structure. The levitation-actuator stator includes levitation-actuator stator units connectable to each other in a travelling direction. Each levitation-actuator stator unit includes a coil and an iron core for generating a levitation force between the levitation-actuator stator unit and the levitation-actuator movable element. A length of an end portion of each iron core is equal to or larger than a length of each coil between the ends of the coil so that the cores are continuously arranged without gaps therebetween when the levitation-actuator stator units are connected to each other in the travelling direction.