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:
Aug. 18, 2009
Filed:
Jun. 20, 2007
Nozomu Tanioka, Nagano-ken, JP;
Akira Akahane, Nagano-ken, JP;
Nozomu Tanioka, Nagano-ken, JP;
Akira Akahane, Nagano-ken, JP;
Harmonic Drive Systems Inc., Tokyo, JP;
Abstract
In a linear actuator (), on the inside of a rectangular tubular movable element (), a linear guide () that supports the movable element () so as to be linearly movable is positioned at a center of the movable element (), and a position detecting mechanism () and load attaching member () that sandwich the linear guide are disposed linearly in a vertical direction. This arrangement enables a center of gravity of the movable element () to be matched with a center of the linear guide (). A magnetic circuit is in a bilaterally symmetrical relationship with regard to the center of the movable element (). Therefore, a center of a thrust force that acts upon the movable element () is matched with the center of the movable element (). The center of the thrust force that acts upon the movable element (), the center of gravity of the movable element (), and the center of the linear guide () are positioned at the center of the movable element (). Resistance to sliding in the movable element () can be reduced without unreasonable stress being placing on the linear guide (). Therefore, a magnetically driven linear actuator that has highly precise positioning and that is durable can be realized.