Work holders – Operator supported
Reexamination Certificate
2011-08-09
2011-08-09
Nguyen, George (Department: 3723)
Work holders
Operator supported
C361S139000, C361S143000, C361S144000, C269S058000
Reexamination Certificate
active
07992850
ABSTRACT:
A method for operating an electromagnetic lift that includes a generator-driven electromagnet comprises adjusting a position of the electromagnet, in response to a first position command. Upon receiving a lift command, an output power level of a generator is established at a predetermined level above a predefined normal power level. In response to an excess release command, the output power level is set to a first predetermined level below the normal power level. In response to a transport command, the output power level is established as approximately the normal power level. Upon receiving a release command, the output power level is established at a second predetermined level below the normal power level.
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Partial English-Language Translation of German Patent No. 26 10 781, 6 pages.
Cooper Timothy Lynn
Portscheller James Ivan
Zhang Xiaojun
Caterpillar Inc.
Finnegan Henderson Farabow Garrett & Dunner LLP
Nguyen George
LandOfFree
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