Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Patent
1973-08-10
1976-09-07
Spear, Jr., Frank A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
210120, 210135, 210136, 210137, 210341, 210436, B01D 3514, C02C 114
Patent
active
039792927
ABSTRACT:
A duplex filter system having two filterized fluid flow circuits for maintaining continuous fluid flow to an engine or similar liquid utilizing device during a filter change operation. A fluid control system is provided including liquid-obstructing air vent means for selectively venting air under pressure from an empty one of said two circuits while retaining fluid under pressure within the other said circuit during charging of said empty circuit, whereby fluid pressure within the system is regulated, and the fluid flow controlled. Detection means for detecting pressure within each of the two circuits.
REFERENCES:
patent: 2942732 (1960-06-01), Edeler
patent: 3715416 (1973-02-01), Campbell et al.
Caterpillar Tractor Co.
Lander Ferris H.
Spear, Jr. Frank A.
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