US 11,752,454 B2
Filter device
Kouhei Mimura, Yokosuka (JP)
Assigned to NIFCO INC., Yokosuka (JP)
Appl. No. 16/494,980
Filed by NIFCO INC., Yokosuka (JP)
PCT Filed Mar. 20, 2018, PCT No. PCT/JP2018/010986
§ 371(c)(1), (2) Date Sep. 17, 2019,
PCT Pub. No. WO2018/174048, PCT Pub. Date Sep. 27, 2018.
Claims priority of application No. 2017-056841 (JP), filed on Mar. 23, 2017.
Prior Publication US 2020/0197839 A1, Jun. 25, 2020
Int. Cl. B01D 29/35 (2006.01); B01D 39/16 (2006.01)
CPC B01D 29/35 (2013.01) [B01D 39/16 (2013.01); B01D 2201/20 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A filter device comprising:
a filter body having a base end, a flange, a middle portion between the base end and the flange, and a fluid passage passing through the filter body;
an orifice member substantially having a cylindrical shape and assembled in the fluid passage,
wherein the orifice member includes a main member, an orifice penetrating through the main member, side exits formed in the main member to communicate the orifice and the fluid passage, a first flange portion formed on an outer peripheral face of the main member and having a knurling portion engaging an inner peripheral face of the base end around the fluid passage such that the main member is spaced from the inner peripheral face of the fluid passage, a second flange portion formed on the outer peripheral face of the main member and a trap member disposed around the main member between the first flange portion and the second flange portion in which a residue formed when the first flange portion is pressure-inserted into the fluid passage is caught, and
a filtering member which is a cylindrical mesh member with a bottom and is arranged to surround the main member, the bottom covering a front side opening of the orifice member so that fluid flows through the filtering member and the bottom.