A fluid filter comprising a pleated filtering medium arranged in an annulus and having axial main pleats (defined by radial score lines), oblique secondary pleats (defined by "sawtooth" score lines) at the radial peripheries of the annulus, and seals around the peripheries which overlap at least a portion of the oblique pleats; the filter tapering at the oblique pleats to an axial dimension less than a corresponding axial dimension of the main pleats.

A flat bed filter in which a filter medium in strip form is supported on an endless conveyor and supports a pool of contaminated liquid to be filtered. The conveyor is periodically advanced to provide fresh filter medium for filtering the contaminated liquid. The underside of the conveyor communicates with an evacuated compartment which is separated into separate chambers by a transverse partition. The transverse partition is in sealing engagement with the underside of the conveyor that advances...

A filter includes a substrate with a relative dielectric constant of 200 or less and a thickness of 0.1 mm or more. A first electrode is disposed on at least one surface of the substrate, a group of second electrodes is disposed on at least the other surface of the substrate. Each of the second electrodes is not in contact with each other and is not in contact with the first electrode. The filter also includes a chip type inductance element. The chip type inductance element has an inductance ran...

Here disclosed is a parallel-resonance type band-pass filter, which is employed for mobile communications equipment such as a mobile phone. According to the filter, each resonator has a single capacitor and serially connected plural inductors both of which are formed on the surface or on an inner layer of a substrate. Electromagnetic coupling between the resonators is established through electromagnetic coupling between at least a pair of inductors--the inductors of the pair belong to respective...

A filter includes upper and lower filter members that form at least two opposed surfaces that face each other, a porous member contained in the filter member, and a coupling member having an opening that is open to the porous member so that the porous member communicates with the coupling member. In the filter, the filter member removes foreign matters contained in liquid, and the liquid from which the foreign matters are removed is discharged through the porous member and the coupling member.

A filter comprising a housing, which consists of at least two housing parts, and a filter element attached inside the housing. The invention provides for at least one latch element by means of which a detachable latched connection can be established between the filter element and at least one of the housing parts.

A filter is disclosed formed of a bag having sidewalls of a semi-permeable material. A debris dam is provided at the upper edge of one of the sidewalls and has a generally cylindrical shape formed from a porous material. The filter is intended for use in conjunction with a drainage system and the bag is mounted to be positioned below the catch basin of such system and the debris dam fits within the overflow slot normally provided. When water or another liquid passes through the filter any solid ...

The invention relates to a spin-on filter for filtering a flowing substance, especially to a filter for hydraulic liquid or lubricating oil in combustion motors. The filter comprises a casing, which is openable at one end, a substantially cylindrical replaceable filter means fitted inside the casing, the flow to be filtered having been arranged to pass through the filter means mantle, and a collar for connecting the filter with a device assembly, which includes inlet and outlet ducts for flow to...

The invention refers to a filter 1 with several rotating filter discs 3 mounted on a shaft 2 and which are provided with a porous filter medium. It is characterized by elastomer elements (8, 8') being mounted on the shaft (2) as spacers between the individual filter discs (3). In addition, the invention refers to a filter disc 3 for a filter 1 of this kind.

Filter having a rectangular frame, the top and bottom frame members having a central groove on their inside face extending to at least one end of the top and bottom members, a filter core within the frame having a length of sheet filter media disposed in pleated formation within the frame, with the respective end edges of the media sealed to the frame end members, and the pleated side edges of the filter embedded in a slab of sealant extending across the inside faces of each of the top and botto...