Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1998-11-18
2000-05-02
Ballato, Josie
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324686, 324687, G01R 2726
Patent
active
060576928
ABSTRACT:
In a measuring arrangement for determining the lift of a valve including a cylindrical valve stem member arranged in overlapping telescopic relationship with a stationary cylindrical member so as to be movable relative thereto, one of the cylindrical members has on its surface adjacent the other cylindrical member first and third capacitor structures which are axially spaced, and insulated from, each other and the other is provided on its surface adjacent the one cylindrical member with a second capacitor structure extending axially over the first and third capacitor structures when the valve is in a closed position, all the capacitor structures being electrically connected to a control unit for determining from the capacitance difference between the first and third capacitor structures the position of the valve member.
REFERENCES:
patent: 4562430 (1985-12-01), Robinson
patent: 4638670 (1987-01-01), Moser
patent: 4837500 (1989-06-01), Abbringh
patent: 5172039 (1992-12-01), Owens
patent: 5317351 (1994-05-01), Takahara et al.
Allmendinger Klaus
Scherer Matthias
Bach Klaus J.
Ballato Josie
Daimler Chrysler AG
Nguyen Vincent Q.
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