Is a
Patent attributes
Patent Applicant
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Frederick A Johnson0
Date of Patent
June 28, 2005
0Patent Application Number
103847720
Date Filed
March 11, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A support actuator 20 comprises an electro-magnet 21 having an input current 22, provided through a current controller 23, and which is arranged to generate a magnetic field 24 having a variable intensity proportional to a variable current 25 supplied by the controller 23. The intensity of the field 24 is controlled to ensure that the magnet 21 is separated from a support armature 26 arranged to carry a load by an operational gap 27.
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