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US 12,616,928 B2Granted
Filter element with improved dust loading
AssigneeDonaldson Company, Inc.
InventorsGregory S. Tronnes, Robert M. Rogers, Aflal Rahmathullah
Life of this patent
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Abstract
Embodiments disclosed herein relate to a pleated filter element having filter media having a downstream layer of filter material and an upstream layer of fibers. A spacing structure defines a void space between the upstream layer of fibers and the downstream layer of filter material.
Claims20
A filter element comprising:
- filter media in a pleated configuration having a first set of pleat folds forming an upstream face and a second set of pleat folds forming a downstream face, the filter media having a perimeter region, the filter media comprising:
- a downstream layer of filter material in a corrugated configuration defining peaks and valleys;
- and
- an upstream layer of fibers extending across the peaks of the downstream layer of filter material, wherein a void space is defined between the downstream layer of filter material and the upstream layer of fibers, and the upstream layer of fibers has less than 10% solidity;
- and
- a frame component secured to the perimeter region of the filter media.
3 more elements
A method of constructing a filter element, the method comprising:
- creating a spacing structure on a layer of filter material;
- depositing a layer of fibers across the spacing structure of the filter material to form filter media,
- wherein a void space is defined between the filter material and the layer of fibers;
- pleating the filter media to define a first set of pleat folds and a second set of pleat folds, wherein
- the first set of pleat folds form an upstream face and the second set of pleat folds form a downstream face;
- and
- securing a perimeter region of the filter media to a frame component.
4 more elements
A filter element comprising:
- filter media in a pleated configuration having a first set of pleat folds forming an upstream face and a second set of pleat folds forming a downstream face, the filter media having a perimeter region, the filter media comprising:
- a downstream layer of filter material, wherein the downstream layer of filter material has a capture efficiency of at least 10%;
- and
- an upstream layer of fibers, wherein the upstream layer of fibers has a solidity of less than 10%;
- and
- a spacing structure defining a mean void distance between the upstream layer of fibers and the downstream layer of filter material greater than 0.11 mm;
- and
- a frame component secured to the perimeter region of the filter media.
5 more elements
Dependencies are inferred from the claim text.