Inside to outside flow filters

Details Inside to outside flow filters Inside to outside flow filters

1996-07-30

1998-03-31

Savage, Matthew O.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Fluid pressure responsive by-pass

210136, 210438, 210440, 210453, 210458, 2104932, B01D 35147

Patent

active

057334439

ABSTRACT:
Flow inverter arrangements are provided for utilization in spin-on, liquid filter cartridges, such as lubricating oil filter cartridges and the like, wherein the filter cartridge structure normally used for "inside-out" flow is reversed to accommodate "outside-in" flow. Each embodiment of the invention utilizes a cylindrical wall disposed within the hollow core of a filter media, in spaced relation thereto, so as to define an annular space which is aligned with the input ports in the end plate of the housing. A filter media has a first end cap within an opening aligned with the central core so that liquid which is passed from the annular space and through the filter media can pass through the opening in the end cap and to the central port which is aligned with the hollow core of the filter media, but isolated from the filter media by the interior wall. The entire filter element is shifted axially against the bias of the coil spring when the filter media becomes clogged so that the filter media can be bypassed. In one embodiment, an anti-drainback valve is provided at the central opening through the first end cap to prevent liquid in the filter cartridge from completely draining therefrom when it is not pressurized by, for example, operation of a pump such as the lubricating oil pump of an internal combustion engine.

REFERENCES:
patent: 2886180 (1959-05-01), Morgan et al.
patent: 3370708 (1968-02-01), Hultgren et al.
patent: 3502218 (1970-03-01), Tuffnell et al.
patent: 3508658 (1970-04-01), McVay
patent: 3724665 (1973-04-01), Hall
patent: 4292179 (1981-09-01), Stone et al.
patent: 5489384 (1996-02-01), Janik et al.

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