A fluid filter element comprising: an embossed flat filter material which is folded so as to define a plurality of substantially adjacent walls, each wall defining a planar surface between two adjacent fold lines, said wall having an embossing comprising: a first embossing row having a centrally located elongated positive embossment and a distal embossment at each end of the positive elongated embossment, wherein at least one distal embossment is negative; and, a second embossing row spaced from and parallel to the first embossing row, the second embossing row having two elongated embossments, wherein one elongated embossment is negative and one is positive. A method regarding the making of the same.

A fluid filter element comprising: an embossed flat filter material which is folded so as to define a plurality of substantially adjacent walls, each wall defining a planar surface between two adjacent fold lines, said wall having an embossing comprising: a first embossing row having a centrally located elongated positive embossment and a distal embossment at each end of the positive elongated embossment, wherein at least one distal embossment is negative; and, a second embossing row spaced from and parallel to the first embossing row, the second embossing row having two elongated embossments, wherein one elongated embossment is negative and one is positive. A method regarding the making of the same.

A fluid filter element comprising: an embossed flat filter material which is folded so as to define a plurality of substantially adjacent walls, each wall defining a planar surface between two adjacent fold lines, said wall having an embossing comprising: a first embossing row having a centrally located elongated positive embossment and a distal embossment at each end of the positive elongated embossment, wherein at least one distal embossment is negative; and, a second embossing row spaced from and parallel to the first embossing row, the second embossing row having two elongated embossments, wherein one elongated embossment is negative and one is positive. A method regarding the making of the same.

A fluid filter apparatus comprising an upper housing shell; a lower housing shell; a pleat pack element comprising a peripheral frame and a folded pleated media. The frame is at least partially molded over the media to secure the media in the frame, and the media comprises two or more types of media of different densities from each other.

A fluid filter apparatus comprising an upper housing shell; a lower housing shell; a pleat pack element comprising a peripheral frame and a folded pleated media. The frame is at least partially molded over the media to secure the media in the frame, and the media comprises two or more types of media of different densities from each other.

A laminated filter comprises a housing inner sleeve filter element and head cover covering the housing, the housing having an inlet and a second outlet. An inner bottom face of the housing has a sealing ring, a bottom end of the inner sleeve being disposed between the sealing ring and an inner side of the housing, and a top end of the inner sleeve being disposed in the head cover. A bottom end of the filter element is disposed at an inner side of the sealing ring, and a top end of the filter element is disposed in the head cover. A gap communicating with the inlet is formed between the inner sleeve and housing. The top end of the inner sleeve has first filtrate openings, and the top end of the filter element has first and second baffle structures, the second baffle structures having second filtrate openings.

The present invention relates to a filter medium having improved heat resistance and filtration efficiency.

The present invention relates to a filter medium having improved heat resistance and filtration efficiency.

At least one embodiment of the invention pertains to a fluid filter having a fine media element and a coarse media element inside a housing. The fine media element has a plurality of apertures through a flange around the periphery of the fine media element.

At least one embodiment of the invention pertains to a fluid filter having a fine media element and a coarse media element inside a housing. The fine media element has a plurality of apertures through a flange around the periphery of the fine media element.