Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
George Kadlicko0
Date of Patent
May 6, 2008
0Patent Application Number
112051910
Date Filed
August 17, 2005
0Patent Primary Examiner
Patent abstract
An actuator has a position encoder provided by a helical groove formed in the piston rod. The groove is filled with a material of different magnetic characteristics to provide a smooth exterior surface and a varying discernible signal as the rod moves relative to the cylinder. An array of Hall effect sensors is provided around the rod to provide phase shifted signals as the rod moves so that the signal of one sensor may be correlated by the signals of other sensors.
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