Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1996-11-19
1998-10-27
Ferensic, Denise L.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
251351, 137557, 346686, E03B 707
Patent
active
058266160
ABSTRACT:
A shiftable valve spool has a plurality of distinct targets carried thereon. The targets are preferably axially spaced and located at one end of the valve spool. A detector mounted in the valve detects each target as each target enters a detection field of the detector. The detector generates a distinct output indicative of one target positioned within the detection field of the detector. A control determines, in response to the output from the detector, the exact valve spool position.
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European Search Report dated Feb. 9, 1998.
Ball John
Ferensic Denise L.
ISI Norgren Inc.
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