DUAL BAG FILTER

摘要

A dual bag filter is provided where a replaceable filter element resides in and is sealed to a filter housing. The filter element has a mounting ring, an inner bag, and an outer bag. The inner bag is sized such that it has more surface area than the outer bag and is constrained by the outer bag. The inner bag is formed from a filter medium of different densities such that when the inner bag is crumpled, fluid flow is not restricted.

主权项

1. A fluid filter assembly comprising:
a filter housing, said filter housing including:
an inlet for receiving unfiltered fluid;an outlet for discharging fluid, said outlet in fluid communication with said inlet;a shoulder, located between said inlet and said outlet, said shoulder having a mating surface;an internal cavity for receiving a filter element; a filter element including:
a mounting ring, having a flange portion and an attachment portion, said attachment portion formed from a substantially rigid material, said flange being flexible and adapted to seal to said mating surface;an outer bag joined to said mounting ring, said outer bag formed from mesh, said outer bag being smaller than said internal cavity of said filter housing; andan inner bag joined to said mounting ring and carried within said outer bag, said inner bag having more surface area than said outer bag and being constrained within said outer bag so that said inner bag is randomly crumpled and folded within said outer bag.