Differential pressure indicator

Details Differential pressure indicator Differential pressure indicator

1975-03-27

1976-09-14

Woodiel, Donald O.

Signals and indicators

Alarms

Fluid flow

73419, G01D 700, G01L 716

Patent

active

039800407

ABSTRACT:
A differential pressure indicator for indicating the state of a filter element comprises a magnetic piston slidable in a sleeve against a spring and subjected at its opposed faces to the pressures on each side of the filter element. A rod fixed to the piston has steps or projections which can be forced through an expansible collet as the differential pressure increases. The piston thus has a limited number of precise positions which are indicated by an indicator element of magnetic material slidable on a member exterior of the sleeve.

REFERENCES:
patent: 3125062 (1964-03-01), Raupp et al.
patent: 3379206 (1968-04-01), Whiting

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