Patent Number: 6,309,552

Title: Slack filter tube having an internal resilient support extending therethrough

Abstract: A filter tube for use in earth coated type filters includes a flexiblepermeable tubular sheet internally supported by a helical spring. Theinternal spring is connected between opposite ends of the filter tube tosupport the full length of the tube wall. One end of the tube is connectedto an external spring and anchor plate. In a slack position, the tube endfolds over an end collar connected to the spring. Extension of the anchorplate applies tension to stretch the spring and tube to a taut positionduring a cycling operation which oscillates the tube to dislodgeaccumulated material.

Inventors: Hobson, Jr.; Russell B. (Old Fort, NC)

Assignee:

International Classification:

Expiration Date: 10/32013