Cleanable filter bag assembly
AssigneeGore Enterprise Holdings, Inc.
InventorsRaymond M. Wnenchak, John E. Bacino, Stephen K. Stark, Erik H. Wildt, Karen Tronto
Life of this patent
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Abstract
The present invention is directed to novel filter bag assemblies comprising a support structure, such as a support cage of metal, plastic, or the like, and a filter media of expanded PTFE membrane(s) without a backing material or layer. In a preferred embodiment, the filter bag assembly further comprises a support cover, or cage cover, which fits over the exterior surface of the support, or cage, to prevent contact of the filter media with the cage.
Claims14
A cleanable filter bag assembly for filtering particulates from a gas stream comprising:
- a support cage;
- an air permeable cage cover covering the support cage, the cage cover having an air permeability of 550 cubic feet per minute per square foot or below, and
- a filter bag consisting essentially of at least one layer of expanded PTFE membrane,
- whereby said cage cover protects said filter bag from contact with said support cage during said filtering.
A cleanable filter bag assembly for filtering particulates from a gas stream comprising:
- a support cage;
- an air permeable knitted polyester cage cover covering the support cage, said cage cover having an air permeability of 550 cubic feet per minute per square foot or below,
- a filter bag consisting essentially of at least one layer of expanded PTFE membrane, said membrane having a Ball Burst number of from 3 to 50 pounds and a gas permeability of at least 1 cubic foot per minute per square foot, and
- an attachment means comprising a filter cuff and hose clamp for attaching said filter bag and cage cover to said support cage,
- whereby said cage cover protects said filter bag from contact with said support cage during said filtering.
Dependencies are inferred from the claim text.