Double-filtering filter for vehicle engine lubricants, with comp

Details Double-filtering filter for vehicle engine lubricants, with comp Double-filtering filter for vehicle engine lubricants, with comp

1992-03-02

1993-06-08

Savage, Matthew O.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Check valve

210316, 210352, 210438, 210440, 210450, 210492, 210DIG13, 210DIG17, B01D 2714

Patent

active

052176061

ABSTRACT:
An oil filter for providing coarse and fine filtration of lubricating oil in an internal combustion engine is disclosed herein. The oil filter includes a cylindrical housing closed by a cover containing a coarse-filtering cartridge of pleated paper included between a lower plate and an upper plate, and a fine-filtering cartridge placed between the coarse-filtering cartridge and the cover. The fine-filtering cartridge is supported between a lower base plate and an upper base plate arranged to bear against the cover. Both filtering cartridges have a cylindrical shape with axial recesses extending therethrough. The fine-filtering cartridge is composed of a band of filtering paper disks, the band being bent as an accordion. The upper base plate is integrally formed with to a first end of a barrel with the barrel coaxially extending through the axial recess of said fine-filtering cartridge and partially into the axial recess of said coarse-filtering cartridge. The filter includes means for fixedly attaching the upper plate of the coarse-filtering cartridge about said barrel, with the lower base plate being slidably attached about the barrel. A helical compensating spring is placed between the upper plate of the coarse-filtering cartridge and the lower base plate of the fine-filtering cartridge for compressingly stressing the fine-filtering cartridge towards said housing cover.

REFERENCES:
patent: 3353680 (1967-11-01), Niebergall
patent: 4265748 (1981-05-01), Villani et al.
patent: 4738776 (1988-04-01), Brown
patent: 5041221 (1991-08-01), Drusi

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