Abstract: A backflow of liquid inside a filter device during an operation of an internal combustion engine is allowed to be obviated while air inside the filter device is purged so as not to generate bubbles in the liquid. An outflow portion that includes a cylindrical portion having a substantially bottomed cylindrical shape and a back pressure valve provided inside the cylindrical portion is provided so as to penetrate a bottom surface of a case. In addition, a lid body provided on the case and an upper plate of a filter element so as to cover an upper end of the case has a first hole that communicates between a space inside the case and a space outside the case. When the back pressure valve opens (a valve body does not abut on a first valve seat), a space inside the filter element communicates with the space outside the case via a second through-hole formed in a side surface of the cylindrical portion.

Abstract: A filter device allows avoiding liquid and dust before filtration to flow out to a tank during replacement of a filter element. A case includes a first tubular portion and a second tubular portion positioned with a lower side of the first tubular portion. The second tubular portion has a diameter smaller than that of the first tubular portion. In a state where the filter element is provided inside the case, a tubular portion of the filter element abuts on the second tubular portion. A part abutting on the second tubular portion of the tubular portion is absent of a hole. A part without abutment on the second tubular portion of the tubular portion has a plurality of holes.

Abstract: A filter device that facilitates maintenance is provided. A case that internally includes a filter element includes a lid body. The lid body includes a flange portion having a substantially cylindrical shape fixed to the case and a cover having a substantially plate shape detachably provided to the flange portion. The flange portion has a first hole, and the cover has a second hole. The first hole and the second hole communicate between a space inside the case and a space outside the case.

Abstract: A filter element having a substantially cylindrical shape is provided inside a filter case that is provided with a plurality of opening portions in a side surface and has a bottomed substantially cylindrical shape. A fluid flows into a hollow portion of the filter element from an inflow portion provided between a bottom surface of the filter case and the filter element in a height direction. Further, an inner tube provided inside a filtration material having a substantially cylindrical shape includes a first region that is formed with an opening portion substantially on the entire surface and a second region that is not formed with an opening portion. The second region is provided below the first region to include a lower end of the inner tube.

Abstract: An inner case being substantially cylindrical and being covered at an upper end is provided to cover a heater being substantially rod-shaped. A float being substantially plate-shaped and having substantially the same inner diameter as an inner diameter of the inner case is provided movably in the vertical direction in the inner case, and in the float, a hole through which the heater is inserted is formed. Gas is enclosed in a space surrounded by the inner case and the float. The length in the vertical direction of the inner case is smaller than the length in the vertical direction of the heater. In addition, when the float is positioned at a lower end of the inner case, a gap exists between the float and a bottom surface of a filter case.

Abstract: Inside a tank body storing a liquid, a return filter is provided protruding downward from an upper surface of the tank body, and a substantially plate-like (plate-shaped) float is also provided that is inserted into the tank body and floats in accordance with change in a liquid surface of the liquid stored in the tank body. The float is provided with an opening larger than a diameter of a filter case, and in a plan view, the float is disposed between the tank body and the filter case.

Abstract: A filter element having a substantially cylindrical shape is provided inside a filter case that is provided with a plurality of opening portions in a side surface and has a bottomed substantially cylindrical shape. A fluid flows into a hollow portion of the filter element from an inflow portion provided between a bottom surface of the filter case and the filter element in a height direction. Further, an inner tube provided inside a filtration material having a substantially cylindrical shape includes a first region that is formed with an opening portion substantially on the entire surface and a second region that is not formed with an opening portion. The second region is provided below the first region to include a lower end of the inner tube.

Abstract: A filter device is provided with an impeding member that impedes a flow of a fluid in a hollow portion of a filter element or a hollow portion of an outflow portion that communicates the hollow portion of the filter element and an exterior of a filter case. Further, a lid member that covers an upper end of the filter case includes an external flow path that communicates the hollow portion of the filter element to the exterior of the filter case.

Abstract: Water or foreign matter can be prevented from entering a threaded engagement portion. When a first screw part formed in the vicinity of an opening end of a casing is threadedly engaged with a second screw part formed on a head, a filter element assembly is attached to the head, and an elastic member provided in a recessed part disposed adjacently with the first screw part on a face on which the first screw part is formed in the casing deforms along convex-concave shape of the second screw part.

Abstract: An air vent hole includes a substantially columnar hole main body portion, a first hole portion formed on the upper side of the hole main body portion, and a second hole portion formed on the lower side of the hole main body portion. Each of the first hole portion and the second hole portion partly has, in a cross section of the hole portion substantially orthogonal to a first direction that is a longitudinal direction of the hole main body portion, a cross-sectional area smaller than a cross-sectional area of a cross section of the hole main body portion substantially orthogonal to the first direction. A float inserted into the air vent hole is movable between a position where the float occludes the first hole portion and a position where the float occludes the second hole portion. The float occludes the first hole portion under the weight of the float. However, the float is pushed up by air. Furthermore, the float is formed of a material having a smaller specific gravity than a liquid to be filtered.

Abstract: When a liquid flows into a case along a tangential direction at an arbitrary point on a side surface of a filter case from an inflow pipe provided substantially around an outer periphery, at the side surface of the filter case, a swirling flow is produced in the liquid flowed and air contained in a fluid is collected in a center portion of the swirling flow to generate bubbles. The inflow pipe and a filter element are positioned not to overlap each other in a height direction, whereby the liquid flows into a hollow portion of a filter element from a case while swirling. The bubbles generated in the center portion of the swirling flow are released to a space above a liquid surface of the fluid retained in a tank through an air outlet portion formed in an upper end surface or the side surface of the filter case.

Abstract: A spool, including a substantially cylindrical flange portion and a substantially cylindrical front end portion which is thinner than the flange portion and whose center axis is substantially coincident with the center axis of the flange portion, is provided in a manner capable of slidingly moving in a cavity formed in a casing. The flange portion is inserted in a first cavity which has a center axis substantially coincident with the center axis of the casing and which has an inner diameter that is substantially the same as the diameter of the flange portion in length. The front end portion is inserted in a second cavity which is formed with its center axis being substantially coincident with the center axis of the casing, and which has an inner diameter greater than the diameter of the front end portion and less than the inner diameter of the first cavity in length.

Abstract: A filter device is provided with an impeding member that impedes a flow of a fluid in a hollow portion of a filter element or a hollow portion of an outflow portion that communicates the hollow portion of the filter element and an exterior of a filter case. Further, a lid member that covers an upper end of the filter case includes an external flow path that communicates the hollow portion of the filter element to the exterior of the filter case.

Abstract: A spool, including a substantially cylindrical flange portion and a substantially cylindrical front end portion which is thinner than the flange portion and whose center axis is substantially coincident with the center axis of the flange portion, is provided in a manner capable of slidingly moving in a cavity formed in a casing. The flange portion is inserted in a first cavity which has a center axis substantially coincident with the center axis of the casing and which has an inner diameter that is substantially the same as the diameter of the flange portion in length. The front end portion is inserted in a second cavity which is formed with its center axis being substantially coincident with the center axis of the casing, and which has an inner diameter greater than the diameter of the front end portion and less than the inner diameter of the first cavity in length.

Abstract: A capping system includes: a moving portion moving a stem, on which an optical semiconductor element is mounted, horizontally; a fixer fixing a cap having a window, on the stem; a camera taking an image of the cap and the stem from above the cap and the stem; a detector detecting whether the optical semiconductor element is present within a visual field of the camera; and a searching action controller controlling the moving portion to move the stem so the detector searches the optical semiconductor element. The searching action controller causes searching radially and outwardly from a search starting point.

Abstract: A capping system includes: a moving portion moving a stem, on which an optical semiconductor element is mounted, horizontally; a fixer fixing a cap having a window, on the stem; a camera taking an image of the cap and the stem from above the cap and the stem; a detector detecting whether the optical semiconductor element is present within a visual field of the camera; and a searching action controller controlling the moving portion to move the stem so the detector searches the optical semiconductor element. The searching action controller causes searching radially and outwardly from a search starting point.

Abstract: A fluid supply device may include a pump device that moves fluid, and a filter device that filters fluid which flows due to operation of the pump device. The pump device may include a pump device housing that comprises a first coupling member which enables the fluid to flow therethrough. The filter device may include a filter device housing that holds a filter element. The filter device housing may have a second coupling member that enables fluid to flow therethrough. The filter device and the pump device may be coupled by a tube member that enables the fluid to flow internally between the pump device and the filter device. Preferably, at least a part of the pump device is interposed between the filter device and the wall such that the pump device overlaps with the filter device in a direction in which the base extends.

Abstract: A method of producing decorative ceramic ware is disclosed. In the first step, a flocculant is added to an aqueous suspension containing as main solid components a fibrous material and a ceramic raw material clay, followed by preparing ceramic raw material sheets from the suspension by the ordinary paper-making method. Prepared are at least two kinds of ceramic raw material sheets differing from each other in color after firing. Then, the stacking-cutting operation of the sheets is performed at least once, in which the different kinds of sheets are alternately stacked, followed by cutting the stacked mass in a direction not parallel with the surface of the raw material sheet. The cut piece is formed into the desired shape and, then, dried and fired to produce a striped or checkered decorative ceramic ware. This particular method permits industrial production of ceramic ware.

Abstract: The fibrous material is for the preparation of a sheet material containing large amounts of inorganic fine powders or inorganic short fibers by a usual paper-making method. A raw material for forming the fibrous material is previously impregnated with a polymer flocculant of the polyacrylamide type or the like in the amount of 0.01 to 5% (dry solids). The fibrous material is adaptable for sheets which can be prepared easily by individuals at home as well as at factories. The fibrous material can be utilized for a wide range of application, for example, for various ceramic products, construction materials, papers for special use, filters and so on and for recovery of solids from waste water or the like.