Signals and indicators – Indicators – Fluid flow
Patent
1985-09-27
1987-03-24
Frankfort, Charles
Signals and indicators
Indicators
Fluid flow
116267, 116DIG42, 210 90, G01L 1912
Patent
active
046516700
ABSTRACT:
A device for indicating differential pressures between first and second pressure sources comprising a housing with a bore and a piston member slidably disposed within the bore and dividing the bore into first and second chambers. The piston member includes a permanent magnet and the housing includes ducts for connecting the first pressure source to the first chamber and the second pressure source to the second chamber whereby the piston member is displaceably responsive to differences in pressure between the first and second pressure sources. The device further comprises indicators in cooperative arrangement with the piston member for indicating at least first and second predetermined differential pressure levels respectively corresponding to respective displacements of the piston member within the bore. The indicators are magnetically coupled to the piston permanent magnet such that they move from non-signalling to signalling positions in response to the respective displacements of the piston member.
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Frankfort Charles
Pall Corporation
Worth W. Morris
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