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US 5,512,075 AGranted
Folded filter element for filtering fluid
AssigneeNippondenso Co., Ltd.
InventorsHitoshi Ninomiya, Kenichi Katoh, Toshiaki Fukuta
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AssigneeNippondenso Co., Ltd.
InventorsHitoshi Ninomiya, Kenichi Katoh, Toshiaki Fukuta
Estimating the term…
A deodorizing air filter is capable of improving the strength and deodorizing ability while suppressing an increase of ventilation resistance and pressure loss. A filter body has a series of filter pieces which are formed into a zigzagged shape by folding along multiple folds of parallel lines of the filter element. The filter body is made of the deodorizing section and the filtering section formed alternatively, the filtering section of the air serves as a filter and deodorizer for the air, and the deodorizing section serves as a deodorizer for the air. As the deodorizing section does not serve as a filter, it is not necessary to make the pitch of each piece of the filtering section smaller. As a result, it is possible to suppress the increase of ventilation resistance and pressure loss.
A folded filter element for filtering fluid formed from a single filtering sheet into a wave shape by folding with an equal pitch so that a plurality of equal pitch portions having a same width are formed in a longitudinal direction, said folded filter element being disposed in a direction diagonal to a fluid flow which is led thereinto, wherein said folded filter element is provided with small pitch portions between said equal pitch portions, said small pitch portions being formed by folding with a small pitch which is smaller than said equal pitch in width, and an entire surface of said small pitch portion at one side being in contact with the next pitch portion.
Dependencies are inferred from the claim text.