Patent ID: 8828228

Claim:
An in-line strainer, comprising: a cylindrical-shaped housing having a first axial end on which an inflow port for liquid is formed, and a second axial end on which an outflow port is formed; a strainer element disposed in the housing; and a cyclone cylindrical body having a diametrically-reduced cylinder portion whose inner diameter is reduced toward a first end of the cyclone cylindrical body, and having a cyclone outflow port formed at an open second end of the cyclone cylindrical body, wherein the cyclone cylindrical body is arranged inside the housing such that the diametrically-reduced cylinder portion is arranged close to the inflow port of the housing, and such that the cyclone outflow port is connected to the outflow port of the housing, the cyclone cylindrical body has a pair of cyclone inflow ports formed on a circumferential wall thereof in the vicinity of the cyclone outflow port, the cyclone inflow ports being diagonally opposed to each other, each cyclone inflow port includes a first guiding edge portion which projects in a radially outward direction, and a second guiding edge portion which curves in a radially inward direction toward an interior of the cyclone cylindrical body, the second guiding edge portion being opposed to the first guiding edge portion, the strainer element is fitted into the housing between the outflow port of the housing and the cyclone outflow port, the housing has an external opening portion formed on a cylindrical wall thereof so as to be communicated with an outside, the cyclone cylindrical body has an extraction opening portion formed at a distal end of the diametrically-reduced cylinder portion, the extraction opening portion being connected to the external opening portion, the extraction opening portion is arranged so as to face in a direction which is perpendicular to an axial direction of the cyclone cylindrical bodes, the strainer element is formed in a shape of a cylinder having a closed one end and an open other end, and is accommodated in the cyclone cylindrical body, the closed one end being disposed in the cyclone cylindrical body such that a distal end of the closed one end is directed to the distal end of the diametrically-reduced cylinder portion, the housing, the inflow port of the housing, the cyclone cylindrical body, the strainer element and the outflow port of the housing are arranged coaxially with each other, and the inflow port of the housing and the outflow port of the housing are arranged such that a direction in which liquid flows into the in-line strainer through the inflow port of the housing is the same as a direction in which liquid flows out of the in-line strainer through the outflow port of the housing.