Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1993-08-31
1995-03-07
Savage, Matthew O.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210429, 210440, 210DIG17, B01D 35147
Patent
active
053955188
ABSTRACT:
A spin-on filter is shown for use in high pressure fluid applications. The filter generally includes a housing having an open end and a closed end. Disposed within the housing is a filter element having an open end and a closed end. A cover is placed in the open end of the housing, the cover having a entrance flow passage operable in delivering fluid to the filter and a exit flow passage operable in delivering fluid from the filter. The cover includes a hub sealingly engaged with the open end of the filter element. A valve assembly extends from the hub into the housing, and defines a valve seat with said hub. The valve seat has a relief channel therethrough, connecting the entrance flow passage to the exit flow passage. A baffle plate is adjacent to the valve seat and biased against the valve seat. In operation, the first and exit flow passages have associated pressures. If the pressure in the entrance flow passage exceeds the pressure in the exit flow passage by a predetermined amount, the baffle plate is displaced from the valve seat. A bypass filter is provided between said first and exit flow passages to filter fluid passing through the relief channel.
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Donaldson & Company, Inc.
Savage Matthew O.
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