Patent ID: 9238187
Filing Date: 2016-01-19
CPC Classification: B01D,F28F

Claim Text:
1. A filter apparatus, comprising: a pipe having a flow channel for a liquid; and a filter device disposed inside the pipe for filtering the liquid, said filter device comprising: a main body portion having a cylinder shape, and inserted into the pipe so that a cylinder axis of the main body portion is inserted along a center axis of the pipe, wherein one end portion of the main body portion is blocked; at least one flange portion provided outside the main body portion between two end portions of the main body portion so that a space inside the pipe is divided in a liquid-tight state by elastic deformation and firm attachment to an inner surface of the pipe upon insertion; a vertical connecting piece extending along the cylinder axis of the main body portion from the one end portion of the main body portion to the flange portion and having a widened portion protruding outwardly at the one end portion of the main body portion, the widened portion of the vertical connecting piece having a diameter substantially equal to an inner diameter of the pipe; a first passing portion including a filter material provided in a cylinder side portion between the one end portion of the main body portion and the flange portion, for filtering the liquid; and a second passing portion for passing the liquid provided on a side close to the other end portion of the main body portion than the flange portion, wherein the at least one flange portion has a diameter greater than the inner diameter of the pipe, and protrudes toward a protruding end thereof to incline in a direction approaching one of either the one end portion or the other end portion of the main body portion, the one end portion of the main body portion and a formation portion of the flange portion are connected by a cylinder-side-portion structural body comprising a plurality of vertical connecting pieces, and a horizontal connecting piece extending between the vertical connecting pieces adjacent each other so as to form the first passing portion between the connecting pieces, the main body portion is molded by an insert molding wherein the filter material having the cylinder shape is inserted such that the filter material is positioned inside a thickness of each connecting piece, the one end portion of the main body portion includes a disk-shaped portion integrally formed to the widened portion of the vertical connecting piece, and the other end portion of the main body portion is formed with the second passing portion, the main body portion includes another flange portion formed between the second passing portion and the flange portion of the main body portion, said another flange portion protruding outwardly from the main body portion, and being inclined in a direction same as that of the flange portion, and the flange portion and said another flange portion have a thickness less than that of the main body portion to elastically deform when the main body portion is inserted into the pipe, and the main body portion further comprises a positioning collar portion between the flange portion and said another flange portion of the main body portion, the positioning collar portion having a thickness greater than that of the flange portion to be rigid.