US 5,238,565 A · Liquid filtration apparatus with adjustable media guide and improved segregation of clean and contaminated liquid

Abstract

Liquid filtration apparatus including an endless chain movable in upper and lower runs through a tank and carrying a continuous web of media on the upper run which passes over a guide roller at the upper rear of the tank, under relatively large diameter guide wheels and over driven guide sprockets at the upper front of the tank. The chain and media also pass over an idler roller between the guide wheels and the driven sprocket. The shaft of the idler roller is adjustably positioned in horizontal slots in the tank side walls to change the vertical angle of the media as it exits the pool of dirty liquid. When the media is at a steep angle a greater head of dirty liquid may be maintained, but contaminants may fall off the media, in which case the idler roller position is moved farther away from the guide wheels to provide a more gradual angle of media travel. Arcuate troughs are affixed to the tank side walls adjacent to and substantially concentric with the lower peripheries of the guide wheels to receive any dirty liquid which may leak through the edge seals or escape above the edge seals due to overfilling the dirty liquid pool.

Claims18

Dependent claims

Liquid filtration apparatus wherein solid contaminants are removed from liquid by passage thereof through a liquid-pervious media, said apparatus comprising:

a) a tank having front, rear, bottom and opposite side walls;
b) an endless, open-mesh chain;
c) rotary guide means establishing a path of travel including upper and lower runs of said chain, said upper run extending from the upper rear of said tank, generally downwardly and forwardly at a first vertical angle to a lowermost position of said upper run, thence generally upwardly and forwardly at a second vertical angle from said lowermost position toward the upper front of said tank;
d) means for feeding said media from a supply thereof in a continuous web from a position rearwardly adjacent said upper rear of said tank for support upon the upper surface of said upper run of said chain, said tank being divided by said upper run of said chain into upper and lower compartments for dirty and clean liquid, respectively;
e) drive means for imparting movement to said chain through its endless path, said chain carrying said media across said upper run for discharge at the end thereof;
and
f) adjustment means for selectively varying said second vertical angle between relatively steep and relatively shallow angles.

4 more elements

In liquid filtration apparatus including:

a tank having front, rear, bottom and opposite side walls;
an endless, open-mesh chain and drive means for moving said chain through its endless path;
first, second and third rotary guide means establishing an upper urn of said chain and fourth rotary guide means establishing a lower run, said chain passing over said first and third rotary guide means at the beginning and end, respectively, of said upper run, and under said second rotary guide means to establish a lowermost position of said upper run, said second rotary guide means comprising a pair of guide wheels respectively mounted inwardly adjacent said tank side walls;
means for feeding liquid-pervious media in a continuous web for support upon and movement with said upper run of said chain, said tank being divided by said upper run of chain and media into upper and lower compartments for dirty and clean liquid, respectively, and engagement of said guide wheels with the media on said upper run of chain providing edge seals along each lateral side of said upper compartment;
the improvement comprising:
means comprising a pair of arcuate troughs respectively extending substantially concentrically about and adjacent lower peripheral portions of said guide wheels for preventing dirty liquid from said upper compartment which leaks through or spills over said edge seals from mixing with clean liquid in said lower compartment.

3 more elements

Dependencies are inferred from the claim text.

Liquid filtration apparatus with adjustable media guide and improved segregation of clean and contaminated liquid

Life of this patent

Liquid filtration apparatus with adjustable media guide and improved segregation of clean and contaminated liquid

Life of this patent

Abstract

Claims18