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    • 2. 发明授权
    • Multi-stage fluid filter, and methods of making and using same
    • 多级流体过滤器及其制造和使用方法
    • US06379564B1
    • 2002-04-30
    • US09566035
    • 2000-05-08
    • Ronald Paul RohrbachGordon William JonesPeter D. UngerDaniel E. BauseLixin L. XueRussell A. Dondero
    • Ronald Paul RohrbachGordon William JonesPeter D. UngerDaniel E. BauseLixin L. XueRussell A. Dondero
    • B01D3700
    • C10M175/0058B01D37/025C10M175/0091
    • A fluid filter increases the useful life of the filtered fluid by removing contaminants therefrom, and may optionally provide for in-line delivery of additives to the filtered fluid. The filter may be an oil filter, a fuel filter, or other fluid filter. The fluid filter includes a casing which defines a hollow space therein, a mechanically active filter element within that space, and a chemically active filter element also retained within the hollow space proximate the mechanically active filter element. The chemically active filter element includes a nonwoven web made up of a plurality of fibers. Each fiber has a longitudinally extending internal cavity formed therein, and a corresponding longitudinally extending slot opening from that internal cavity to the outer surface of the fiber. Preferably each fiber as multiple lobes extending radially outwardly from a central stem, and each lobe cooperates with an adjacent lobe to define a longitudinally extending internal cavity and a corresponding slot therebetween. In order to remove contaminants or to supply additives to lubricating oil, the internal cavities, of each of the chemically active filter fibers, are supplied with a chemical reagent therein.
    • 流体过滤器通过从中除去污染物来增加过滤流体的使用寿命,并且可以任选地提供添加剂在过滤流体中的在线输送。 过滤器可以是油过滤器,燃料过滤器或其它流体过滤器。 流体过滤器包括在其中限定中空空间的壳体,在该空间内的机械活动过滤元件,以及也保持在靠近机械活动过滤器元件的中空空间内的化学活性过滤器元件。 化学活性过滤元件包括由多根纤维构成的非织造纤维网。 每个纤维具有形成在其中的纵向延伸的内腔,以及从该内腔到光纤的外表面的相应的纵向延伸槽。 优选地,每个纤维作为从中心杆径向向外延伸的多个叶片,并且每个叶片与相邻的凸角配合以限定纵向延伸的内部空腔和它们之间的相应的狭槽。 为了去除污染物或向润滑油中提供添加剂,每个化学活性过滤纤维的内腔在其中被供给化学试剂。