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US 11,376,541 B2Granted
Tetrahedral filter media
AssigneeCummins Filtration IP, Inc.
InventorsMing Ouyang, Miao Li
Life of this patent
Estimating the term…
Abstract
Filter media having generally tetrahedral shaped flow channels is described. The filter media is generally formed by a flat filter sheet and a formed sheet. The formed sheet may be formed by a curves and/or pleats in the sheet. The curves and/or pleats form the tetrahedron channels. Embossments, such as dimples, are provided on the crests formed by the curves and/or pleats. The embossments help to maintain spacing between adjacent layers of the filter media, thereby increasing dust holding capacity and decreasing pressure drop over similarly configured filter media not having the embossments.
Claims20
Filter media comprising:
- a first sheet of filter media having a first side and a second side, the first sheet formed at an upstream end and a downstream end to have a plurality of curves that follow a sinusoidal pattern, the sinusoidal pattern forming a plurality of rounded tetrahedron flow channels that are alternately sealed to each other at the first side to define:
- a first set of rounded tetrahedron channels having open first ends, and
- a second set of rounded tetrahedron channels interdigitated with the first set of tetrahedron channels and having closed first ends,
- the first sheet of filter media comprising:
- a first plurality of embossments positioned along a line that represents a contact line between the first sheet and a second sheet, the first plurality of embossments protruding downward opposite a transverse direction;
- and
- a second plurality of embossments positioned between the upstream end and the downstream end, the second plurality of embossments disposed adjacent to the line on a transition between adjacent ones of the plurality of curves, the second plurality of embossments protruding upward along the transverse direction,
- the second sheet of filter media extending across the first sheet of filter media, the second sheet of filter media is a flat sheet of filter media.
5 more elements
Filter media comprising:
- a curved sheet of filter media having an upstream end and a downstream end, the curved sheet being folded along a plurality of curves that follow a sinusoidal pattern, the sinusoidal pattern forming a plurality of rounded tetrahedron flow channels, the curved sheet of filter media comprising:
- a first plurality of embossments positioned between the upstream end and the downstream end, the first plurality of embossments arranged at crests of the rounded tetrahedron flow channels, the first plurality of embossments protruding downward opposite a transverse direction;
- and
- a second plurality of embossments positioned between the upstream end and the downstream end, the second plurality of embossments disposed adjacent to the crests on a transition between adjacent ones of the plurality of curves, the second plurality of embossments protruding upward along the transverse direction.
1 more element
A filtration system comprising:
- a housing body, the housing body comprising:
- a housing outlet, a housing inlet, and a central compartment;
- and
- a filter element installed in the central compartment, the filter element comprising filter media, the filter media comprising:
- a first sheet of filter media having a first side and a second side, the first sheet of filter media formed at an upstream end and a downstream end to have a plurality of curves that follow a sinusoidal pattern, the sinusoidal pattern forming a plurality of rounded tetrahedron flow channels that are alternately sealed to each other at the first side to define:
- a first set of rounded tetrahedron channels having open first ends,
- the first sheet of filter media comprising:
- a first plurality of embossments positioned between the upstream end and the downstream end, the first plurality of embossments positioned along a line that represents a contact line between the first sheet and the second sheet and protruding downward opposite a transverse direction;
- and
- a second plurality of embossments positioned between the upstream end and the downstream end, the second plurality of embossments disposed adjacent to the line on a transition between adjacent ones of the plurality of curves, the second plurality of embossments protruding upward along the transverse direction;
- and
- a second set of rounded tetrahedron channels interdigitated with the first set of tetrahedron channels and having closed first ends;
- and
- a second sheet of filter media extending across the first sheet of filter media.
11 more elements
Dependencies are inferred from the claim text.