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:
Jul. 18, 1989
Filed:
Dec. 29, 1987
David G Hoag, Medway, MA (US);
The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US);
Abstract
An electromagnetic suspension system for suspending a platform element with respect to a base element includes electromagnetic isolator/actuators, having a permanent magnet with a pole gap between the magnetic poles, and a coil having turns of electrically conductive material. The coil and permanent magnet are positioned so that at least a portion of each of the coil turns is within the pole gap of the permanent magnet, with the portion being aligned substantially perpendicularly to the polar axis of the permanent magnet. When electric current is applied to the coil, an electromagnetic force is generated between the coil and the permanent magnet. This force is proportional to the current and substantially independent of relative velocity of motion between the coil and the magnet.