Folded filter screen

Details Folded filter screen Folded filter screen

1986-04-01

1987-10-13

Fisher, Richard V.

Liquid purification or separation

Filter

Within flow line or flow line connected close casing

2104941, 55521, B01D 2906, B01D 3502

Patent

active

046997156

ABSTRACT:
A filter screen for filtering contaminant particles from the fluid system of a hydraulic system comprises a screen which forms an axially extended convoluted nipple-like enclosure which opens through a passage formed in a base and terminates at a nose portion opposite the base. The screen has folded sides which comprise a plurality of angularly spaced alternating generally convex surface sections and generally concave surface sections generally symmetrical to the central screen axis. The screen is folded to form a continuous serpentine rim configuration at the base. The serpentine rim comprises an inner plurality of angularly spaced fold segments which engage the exterior surface of the base and an outer plurality of angularly spaced fold segments which overlap the inner fold segments in an alternating fashion. The screen is shaped and dimensioned so that the surface area of the screen generally increases from the nose to the base of the screen.

REFERENCES:
patent: 383493 (1888-05-01), Sargent
patent: 1048828 (1912-12-01), Haas
patent: 2420414 (1947-05-01), Briggs
patent: 3426910 (1969-02-01), Winzen
patent: 3458050 (1969-07-01), Cooper
patent: 4231767 (1980-11-01), Acker

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