Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2007-10-09
2007-10-09
Wachsman, Hal (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C702S150000, C324S207110, C324S207150, C324S207250
Reexamination Certificate
active
11406121
ABSTRACT:
A shaft comprises a hardened outer metallic layer having a first hardness level with a generally uniform radial depth. A first strip extends in a generally longitudinal direction in the outer metallic layer. The first strip has a second hardness level different from the first hardness level. A second strip in the outer metallic layer has the second hardness level. The first strip and the second strip are spaced apart from each other over at least a longitudinal region. A sensor senses an angular difference between a first magnetic field associated with the first strip and a second magnetic field associated with the second strip. A data processor references an established relationship between a position of the shaft and the angular difference between magnetic fields associated with the first strip and the second strip to detect a position of the shaft with respect to a reference point.
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European Search Report dated Aug. 1, 2007.
Greer Ashley Elwood
Lenz James Edward
Deere & Company
Wachsman Hal
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