Filters, filter devices including the filters, and methods of using the filters and filter devices, are disclosed.

A method comprises forming etching islands on a substrate and exposing the substrate with etching islands to a solution that reacts with the etching islands to form a filter passage of interconnected pores in the substrate. The filter passage has an inlet into the substrate and an outlet from the substrate.

Filter media, including those suitable for hydraulic applications, and related components, systems, and methods associated therewith are provided. The filter media described herein may include two or more layers, at least one of the layers having a relatively high percentage of microglass fibers. Additionally, the filter media may be designed such that the ratio of average fiber diameters between two layers is relatively small, which can lead to a relatively low resistance ratio between the layers. In some embodiments, at least one layer of the filter media comprises synthetic polymer fibers. Certain filter media described herein may have desirable properties including high dirt holding capacity and a low resistance to fluid flow. The media may be incorporated into a variety of filter element products including hydraulic filters.

An assembly forms a seal between components (11, 33) having sealing zones (37,51). The sealing zones face each other in a functional position of the components. A sealing element (43, 57) is on the sealing zone (37, 51) of one component (11, 33). A sealing surface (51) is on the sealing zone (37, 51) of the other component (11, 33) to form a radial seal. The components (11, 33) can be brought into the functional position by a relative movement in the axial direction. The sealing element (43, 57) sealingly interacts with the sealing surface (51) in the functional position. A third component (61) associated with an actuating part (62) acts on the sealing element (43;57) in the functional position of the components (11, 33) to deform the element to increase the sealing force.

A process for the purification of crude polyether polyols is provided, wherein the crude polyether polyols are prepared by anionic polymerization of alkylene oxides in the presence of basic catalysts, the process comprising the steps of: neutralization of the catalysts with mineral acid, addition of adsorption agents and/or filter agents and removing the resultant salts and added filter aids by filtration wherein a filter cake is formed, and wherein polyether polyols are recuperated from the filter cake in a subsequent step of pressing the filter cake.

A third cavity part for forming a filter part of a mesh filter has opening forming pins of the same number as that of openings for forming regular-octagonal openings of the filter part. The opening forming pins are formed at regular intervals along an X-axis direction and a Y-axis direction, and a diameter of an inscribed circle of the regular octagon is equivalent to the dimension between the adjacent opening forming pins along the X-axis direction and along the Y-axis direction. The interval between a first line and a second line adjacent to the first line of the opening forming pins formed at regular intervals along a direction at 45 to the X-axis direction is equivalent to the interval between a third line and a fourth line adjacent to the third line of the opening forming pins formed at regular intervals along a direction at 135 to the X-axis direction.

The present disclosure provides a method of manufacturing a filter, wherein the filter comprises a filter body formed of a porous filtration material and a plastic support structure, the method including performing a first additive manufacturing step to form an initial portion of the support structure; positioning filtration material above or on the initial portion; performing a second additive manufacturing step to form a secondary portion of the support structure such that the filtration material is between the initial and secondary portions. Additionally, the filter body can be enclosed by positioning a first portion of the filtration material to overlay a second portion of the filtration material; and connecting the first portion of the filtration material to the second portion of the filtration material to define a pocket within the filter body, the support structure configured to maintain spacing between the first and second portions of the filtration material.

A rigid flow control device includes a porous rigid body having an outer surface and an inner surface. The body defines a flow path and is formed from a material operatively arranged with a surface energy less than that of the fluid for passively impeding an undesirable component of the fluid more than a desirable component of the fluid.

A filter element to be inserted into a filter housing, has a filter medium with a rim, wherein the rim is connected to an injection-molded frame or at least one injection-molded frame element, providing a flexibly bendable filter element using a frame made of plastic attached by injection molding, wherein the frame or at least one frame element is made of plastics of different hardnesses in alternation in at least one extension direction, such that the filter element can be bent flexibly at least in part by deforming the filter medium and the frame or frame element.

Three dimensional nanoparticle filters are provided herein. In one embodiment a filter device includes a base material, alternating layers of sacrificial material between layers of structural material being deposited onto the base material to create a layered base material, and filter sidewalls etched into the deposited alternating layers of the layered base material to remove the layers of sacrificial material between the layers of structural material to form filter slots in the filter sidewalls as well as create channels between the filter sidewalls, where a size of the filter slots is selectable based on a thickness of the layers of sacrificial material utilized.