Fluid dual filter

Details Fluid dual filter Fluid dual filter

1976-01-16

1977-07-26

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Fluid pressure responsive

210132, 210137, 210316, 210DIG13, B01D 3514

Patent

active

040381897

ABSTRACT:
A fluid dual filter having a primary fine mesh filter element, a secondary coarser mesh element in parallel with the main or primary element and a plurality of bypass valves which are normally closed to block flow through the secondary filter element but which open at an elevated fluid pressure caused by blockage of the main filter element thereby allowing flow through the secondary filter element. The valves are located downstream of the secondary filter element in order to prevent their contamination by any foreign matter in the fluid to be passed through the filter.

REFERENCES:
patent: 1668071 (1928-05-01), Hart
patent: 2605904 (1952-08-01), Ogilvie
patent: 3065854 (1962-11-01), Winslow
patent: 3165469 (1965-01-01), Bruns et al.
patent: 3270884 (1966-09-01), Bremer
patent: 3283904 (1966-11-01), Buckman et al.
patent: 3397786 (1968-08-01), Hultgren
patent: 3539009 (1970-11-01), Kudlaty
patent: 3975273 (1976-08-01), Shaltz et al.

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