Patents Represented by Attorney DLA Piner Rudnick Gray Cary US LLP

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  • Linear voice coil actuator with compensating coils
    Patent number: 6894408
    Abstract: An actuator is provided in which one or more separate compensating coils are employed to alter the distribution of the magnetic flux density in the air gap to produce a substantially constant force throughout the stroke; and in which current in the separate compensating coils can be adjusted with the stroke using separate power supplies and position feedback.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: May 17, 2005
    Assignee: BEI Technologies, Inc.
    Inventor: Mikhail Godkin