US 4,154,588 A · Cylindrical cell self-cleaning filter

Abstract

A stationary cylindrical drum type filter with self-cleaning capability and suitable for use as a cell or module in a bank of like filter units. A helically wound rod defines a cylindrical shape over which a foraminous web is supported in tubular configuration to form a filter element. A suction nozzle is disposed inside the filter element closely adjacent thereto and drive means causes the nozzle to rotate and traverse the filter element between and guided by the adjacent coils of the helix, and controls cause the spiral motion of the nozzle to reverse upon reaching each end of the filter element, and to start and stop in response to predetermined pressure drops through the filter. A plate closes off the filter element at one end of the helical support, and a mounting plate at the other end surrounds the inlet opening thereat and is square shaped with flanges at the side edges for abutment proximate like filter units to form a composite filter bank of any desirable shape and size, with all inlets in a common plane. The individual filter units may have a common suction source and common drive means including gears and removable sectional shaft elements to facilitate removal or addition of the filter units, or they may have individual drives and suction sources.

Claims25

Dependent claims

A cylindrical drum filter unit comprising:

(a) a helically wound support element;
(b) a foraminous filter element supported interiorly by said support element to provide said filter element with a tubular configuration;
(c) suction cleaning means engaging said support element for movement guided thereby and relative thereto such that said cleaning means moves in a helical path defined by said support element, said suction cleaning means being disposed adjacent said filter element;
and
(d) means for moving said suction cleaning means relative to said support element whereby said suction cleaning means is caused to move along the surface of said filter element to clean the same.

2 more elements

A composite filter bank including a plurality of modular filter units, each said modular filter unit being of identical construction and being selectively connected to at least one other modular filter unit to form said filter bank, said modular filter units each including:

(a) a filter element;
(b) suction means selectively movable within said filter element for cleaning thereof;
(c) a helically wound support element;
(d) said filter element being interiorly supported by said support element in tubular configuration;
(e) said suction cleaning means engaging said support element for guided movement relative such that said cleaning means moves in a helical path defined by said support element thereto, said suction cleaning means being disposed adjacent said filter element;
and
(f) means for moving said suction cleaning means relative to said support element whereby said suction cleaning means is caused to move along the surface of said filter element to clean the same.

4 more elements

Dependencies are inferred from the claim text.

Cylindrical cell self-cleaning filter

Life of this patent

Cylindrical cell self-cleaning filter

Life of this patent

Abstract

Claims25