Filter differential pressure impending and bypass indicator

Details Filter differential pressure impending and bypass indicator Filter differential pressure impending and bypass indicator

1984-06-07

1986-03-11

Frankfort, Charles

Signals and indicators

Indicators

Fluid flow

116268, 116283, 210130, G01L 1912, B01D 3514

Patent

active

045747288

ABSTRACT:
A differential pressure indicator for use with a filter providing dual indication to indicate both a bypass condition as well as an impending bypass condition. The indicator includes a pressure detector in the form of a piston carrying a pair of permanent magnets. A pair of cylinders each carrying a permanent magnet are concentrically disposed around the permanent magnets carried by the piston. As the differential pressure increases, the piston moves pulling the permanent magnets affixed thereto through the concentrically disposed magnets and as a result of magnetic force interaction the concentrically disposed cylinders move to expose first one and then the other of the cylinders to provide the signals representative of the impending bypass as well as bypass differential pressure being sensed.

REFERENCES:
patent: 2671834 (1954-03-01), Kmiecik
patent: 3128743 (1964-04-01), Whiting
patent: 3335694 (1967-08-01), Dwyer et al.
patent: 3815066 (1974-06-01), Vinal
patent: 3974795 (1976-08-01), Crisp, Jr.
patent: 4153003 (1979-05-01), Willis

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