Filter element
AssigneesDenso Corporation, Toyoda Boshoku Corporation
InventorsKazuo Kometani, Toshiaki Nakayama, Satoshi Inukai, Takanari Takagaki, Hideo Kamo, Minoru Honda
Life of this patent
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Abstract
A filter element made of nonwoven filter fabric includes a plurality of pleated portions and a flange portion formed integrally with the filter portion. The flange portion is formed by a pair of press-forming dies to have a thin and compressed connecting portion formed along the outer periphery of the filter portion, a thick and uncompressed seal portion formed along the outer periphery of the connecting portion and a thin and compressed protecting portion formed along the outer periphery of the seal portion.
Claims14
A filter element to be installed in a housing having a dusty-side holding member and a clean-side holding member, said filter element being made of compressible nonwoven fabric and comprising:
- a pleated filter portion;
- and
- a flange portion integrally connected with said filter portion's outer periphery for supporting said filter portion, said flange portion including:
- a soft and thick compressible seal portion to be disposed between said dusty-side and clean-side holding members when said filter element is installed in said housing,
- a thin compressed connecting portion disposed integrally between said seal portion and said filter portion, and
- a thin compressed protecting portion disposed integrally around said seal portion for protecting said seal portion from deforming forces.
A filter element to be installed in a housing having a dusty-side holding member and a clean-side holding member comprising:
- a filter portion including a plurality of pleated portions;
- and
- a flange portion integral with an outer periphery of said filter portion for insertion in a space between said dusty-side holding member and clean-side holding member when said filter element is installed in said housing;
- said flange portion including:
- a thick compressible seal portion projecting in a first direction to seal said space, and
- a hard lip portion projecting in a second direction opposite to said seal portion to seal said space and support said seal portion,
- at least one of said seal and lip portions being integral with said outer periphery of said filter portion.
A filter element to be installed in a housing having a dusty-side holding member and a clean-side holding member comprising:
- a filter portion made of nonwoven fabric and including a plurality of pleated portions;
- a flange portion made of the same nonwoven fabric from which said filter portion is made, said flange portion being disposed integrally around said filter portion for supporting said filter portion;
- and
- a separate lip portion being harder then said flange portion and bonded to said flange portion to cover the outer periphery of said flange,
- said flange portion having an integral seal portion to be inserted between said dusty-side and clean-side holding members together with said lip portion when said filter element is installed in said housing.
Dependencies are inferred from the claim text.