Asymmetric honeycomb wall-flow filter having improved structural strength
AssigneeCorning Incorporated
InventorRodney I. Frost
Life of this patent
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Abstract
A honeycomb filter includes an array of interconnecting porous walls which define an array of first channels and second channels. The first channels are bordered on their sides by the second channels and have a larger hydraulic diameter than the second channels. The first channels have a square cross-section, with corners of the first channels having a shape such that the thickness of the porous walls adjoining the corners of the first channels is comparable to the thickness of the porous walls adjoining edges of the first and second channels.
Claims19
A honeycomb filter, comprising:
- an array of interconnecting porous walls which define an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels, the first channels having a square cross-section, with corners of the first channels having a shape such that the thickness of the porous walls adjoining corners of the first channels is in a range of 0.8 to 1.2 times the thickness of the porous walls adjoining edges of the first and the second channels wherein a ratio of the hydraulic diameter of the first channels to the hydraulic diameter of the second channels is in a range from 1.1 to 2.0.
A honeycomb filter, comprising:
- an array of interconnecting porous walls which define an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels, the first channels having a square cross-section, with corners of the first channels having a shape such that the thickness of the porous walls adjoining corners of the first channels is comparable to the thickness of the porous walls adjoining edges of the first and the second channels, wherein a ratio of the hydraulic diameter of the first channels to the hydraulic diameter of the second channels is in a range from 1.7 to 2.0.
A honeycomb filter, comprising:
- an array of interconnecting porous walls which define an array of first channels having a square cross-section and second channels having a square cross-section, the first channels bordered on their edges by the second channels, the edges of the first channels being aligned with edges of the bordering second channels, the first channels having a larger hydraulic diameter than the second channels.
A honeycomb filter, comprising:
- an array of interconnecting porous walls which define an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels, the first and second channels having a square cross-section, with corners of the first channels having a shape including a fillet or a bevel-such that the thickness of the porous walls adjoining corners of the first channels is in a range of 0.8 to 1.2 times the thickness of the porous walls adjoining edges of the first and the second channels and wherein a ratio of the hydraulic diameter of the first channels to the hydraulic diameter of the second channels is in a range from 1.1 to 2.0.
A honeycomb filter, comprising:
- an array of interconnecting porous walls which define an array of first channels and second channels, the first channels being bordered on their sides by the second channels and having a larger hydraulic diameter than the second channels, the first channels having a square cross-section, with corners of the first channels having a shape including a fillet such that the thickness of the porous walls adjoining corners of the first channels is in a range of 0.8 to 1.2 times the thickness of the porous walls adjoining edges of the first and the second channels.
Dependencies are inferred from the claim text.