Nippondenso Co., Ltd.

Susumu Miyakawa

Hajime Akado

Yoshihiro Taki

Toshiaki Fukuta

Yoshitaka Nishio

Toshiaki Nakayama

Satoshi Inukai

Atsushi Sakaida

Hitoshi Harada

Kenji Hikida

A filter device includes an annular filter element having a plurality of wave portions extending outwardly, a central cup-shaped portion arranged at an inner periphery of the filter element, a support frame arranged at an outer periphery of the filter element, and a connecting portion at which both sides of the filter element are abutting on and connected with each other. The central portion, the support frame and the connecting portion are made of synthetic resin and formed as a unitary structure, wherein the outermost and innermost peripheral ends of the filter element are respectively embedded in and held by the support frame and the central portion.

Annular wave filter device

The filter element of the present has a plurality of wavy portions which are so arranged that a plurality of wavy portions make a generally ring like structure. In order to reduce the pressure drop when the fluid flows through the filter element, the present filter element has a special shaped radial gaps. Namely, the width of a first radial gaps, which is formed within adjacent wavy portions and which connects with an inner space formed at the center of the generally ring like structure, increases from the outer end thereof to the inner end thereof. The width of a second radial gap, which is connected with outer atmosphere, decreases from the outer end thereof to the inner end thereof. Both axial ends of the wavy portions are covered with the adhesive sheet on which adhesive layer is cladded.

Zig zag filter element

Method of manufacturing a filter device

A fluid cleaner system including a filter element of substantially cylindrical construction corrugated in a cross-section including the axis thereof to allow a fluid to flow axially from one end to the other end. The filter element is supported and sealed by support means and sealing means and mounted in a case and a cap. The support means and sealing means are simple in construction and yet allow the filter element to fully perform its function.

Fluid filter element and support

A cyclone type air cleaner has a cylindrical housing having a tangential air inlet formed in the peripheral wall of the housing and an air outlet formed in the upper end wall thereof. A downwardly converging frusto-conical member having a central opening is disposed in the housing coaxially therewith to divide the interior of the housing into a first or upper swirling chamber and a lower space in which a cylindrical or annular member is disposed coaxially with the central opening to define therein a second or lower swirling chamber communicated with the upper swirling chamber through the central opening. The cylindrical or annular member cooperates with the housing peripheral wall to define a dust-collecting chamber communicated with the lower swirling chamber through an annular gap defined between the frusto-conical member and the cylindrical or annular member. An axial flow type filter element is disposed between the upper swirling chamber and the air outlet.

Cyclone type air cleaner

A filter means for filtering fluid comprises a first filter section and a second filter section. The filter means is formed by using a folded sheet material having a trapezoid or a sector form. The second filter section of the filter means has a filtering performance different from that of the first filter section of the filter means.

Filter means

A filter element of the cylindrical shape for filtering fluid having a constructional form including two-dimensional wave forms radially spreading from the axis of the cylindrical filter element in the form of annular rings, to allow the fluid to flow axially of the filter element. The filter element is produced by using a sheet of filter material in the form of a trapezoid or a segment.

Growing community of inventors

Kariya, Japan

Susumu Miyakawa