| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 055487000 | Differing mesh sizes | 15 |
| 20090183476 | GAS PURIFYING APPARATUS AND SEMICONDUCTOR MANUFACTURING APPARATUS - A gas purifying apparatus for removing particles from a gas. The gas purifying apparatus includes a first filter layer and a second filter layer, and the diameter of a fiber forming the first filter layer is larger than that of a fiber forming the second filter layer. A semiconductor manufacturing apparatus can use such a gas purifying apparatus. | 07-23-2009 |
| 20090272084 | WAVED FILTER MEDIA AND ELEMENTS - Various high performance, high efficiency filter media are provided that are cost effective and easy to manufacture. In particular, various filter media are provided having at least one layer with a waved configuration that results in an increased surface area, thereby enhancing various properties of the filter media. The filter media can be used to form a variety of filter elements for use in various applications. | 11-05-2009 |
| 20100031617 | PARTICLE FILTER SYSTEM INCORPORATING NANOFIBERS - A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material. The method provides a support having openings for fluid flow therethrough, electrospins nanofibers across an entirety of the openings, and abruptly varies an electric field at the collector at least once during electrospinning of the fibers. | 02-11-2010 |
| 20130152530 | Filtering device, in particular diesel particulate filter - A filtering device features a ceramic filter body for filtering a fluid flow, the filter body consisting of a wavy layer and a flat layer and the wavy and flat layer being wound in a spiral-shaped manner. The wave length of the waves increases from the inside to the outside with increasing distance to the longitudinal axis of the filter body such that the wave troughs and the wave peaks of at least two radially adjacent windings each lie on a common radial plane. | 06-20-2013 |
| 20140090343 | FLAT GASKET WITH CALENDERED SIEVE LAYER - The present invention relates to a flat gasket with filter elements. In order to fulfil the increased requirements with respect to cleanliness, there is an increased demand for the integration of filter elements in flat gaskets. The corresponding filter elements mainly serve for picking of impurities accrued during production as well as other residues circulate via the operational fluids, especially during the initial period of operation of an internal combustion engine or a vehicle. | 04-03-2014 |
| 20140130469 | MULTI-LAYERED FILTER MEDIA - Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media. | 05-15-2014 |
| 20140150387 | CIRCULAR CYLINDER AIR FILTER - A circular cylinder air filter includes an inner cylindrical frame, an outer cylindrical frame, a circular disc, a bonding base and a non-woven fabric cover. The outer cylindrical frame is coaxially arranged around the inner cylindrical frame. The circular disc is fastened to a first end of the inner cylindrical frame and the outer cylindrical frame. The bonding, base is fastened to an opposite second end of the inner cylindrical frame and the outer cylindrical frame. A first opening of the bonding base communicates with a first hollow region between the inner cylindrical frame and the outer cylindrical frame. A second opening of the bonding base communicates with a second hollow region within the inner cylindrical frame. The air filter medium is filled into the first hollow region through the first opening. The fabric cover encloses the outer cylindrical frame circular disc and bonding base to expose the second opening. | 06-05-2014 |
| 20140208705 | Mutli-Pass Fluted Filter - Filter media, filter elements, and method of forming filter media and filter elements are provided. The filter media and filter elements require filtered fluid to pass through filter media twice. The filter media and filter elements generally relate to fluted or similar style filter media. The filter media is formed from convoluted sheets coupled to face sheets to form first and second sets of flutes. At least one of the flute sets includes inlet and outlet seals and the other one of the flutes includes an intermediate seal interposed between the inlet and outlet seals of the other flute set. This forces the fluid to pass through the filter media at least twice. | 07-31-2014 |
| 20140331626 | PRE-COALESCING MULTI-LAYERED FILTER MEDIA - Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media. | 11-13-2014 |
| 20150052865 | Canister Filter with Prefiltration - An integral canister filter having multiple layers, including a prefiltration layer. The prefiltration layer may filter oil and/or water from an airflow to protect downstream components. The prefiltration layer may be treated with a water and/or oil repelling or absorbing material. The second layer may be a porous membrane filter positioned downstream of the prefiltration layer. The third layer may provide structural support for the first and/or second layers. | 02-26-2015 |
| 20150089910 | AIR FILTER - An air filter for a combustion engine for off-load motorcycles is made from a porous foam material. The air filter has contiguous side surface forming a cavity with at least two openings where the side surface contains at least one filter layer, a bottom surface closing at least one of the two openings where the bottom surface contains at least one filter layer, where the side surface has more air resistant than the bottom surface. The side surface has more air resistant than said bottom surface by arranging any combination of thickness of the surfaces, number of layers, and porosity ratio of the layers. | 04-02-2015 |
| 20150113929 | Apparatus and Method for Regulating Filter Media Pack Pleat Spacing - Apparatus and method related to a cartridge filter having self-regulated pleat spacing. An elastic adhesive bead is used on an outer surface of a cylindrically formed pleated filter media to maintain pleat spacing without damaging the pleats or the filter media. In this way, a cylindrical pleated filter media may be formed from a planar filter media without the need for manually spacing the pleats during or after formation into a cylinder. | 04-30-2015 |
| 20160030873 | DUST FILTER BARREL - A dust filter barrel includes a sheet filter cylinder, a mesh cylinder and a fixation base. The sheet filter cylinder has two end faces, an inner layer and an outer layer laminated on the inner layer; wherein the inner layer has a plurality of pores having a first pore diameter, the outer layer has a plurality of pores having a second pore diameter, and the second pore diameter is smaller than the first pore diameter. The mesh cylinder is non-contact with the outer layer of the sheet filter cylinder and sleeved outside the sheet filter cylinder and has two end faces. The fixation base has a first and second cover bodies disposed on the two end faces of the sheet filter cylinder and the mesh cylinder respectively, and the second cover body is formed with at least one opening communicated with the sheet filter cylinder. | 02-04-2016 |
| 20160059167 | PRE-COALESCING MULTI-LAYERED FILTER MEDIA - Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media. | 03-03-2016 |
| 20160136554 | SURFACE MODIFIED FILTER MEDIA - Surface modified filter media, including surface modified filter media having enhanced performance characteristics, are provided. In some embodiments, a filter media may comprise two or more layers designed to enhance fluid separation efficiency. One or more of the layers may have at least a portion of a surface that is modified to alter and/or enhance the wettability of the surface with respect to a particular fluid. In certain embodiments involving a filter media including more than one surface modified layer, at least one surface modified layer may have a greater air permeability and/or mean flow pore size than that of another surface modified layer. Such a configuration of layers may result in the media having enhanced fluid separation properties compared to filter media that do not include such modified layers or configuration of layers, all other factors being equal. The filter media may be well-suited for a variety of applications, including filtering fuel, air, and lube oil. | 05-19-2016 |
