(under subclass 6.21) Device wherein the conditioning means (e.g., filtering, centrifuging or separating) removes foreign material to purify the lubricant.
SEE OR SEARCH CLASS
210, Liquid Purification or Separation, for apparatus to filter or separate liquids.
494, Imperforate Bowl: Centrifugal Separators, appropriate subclasses for apparatus and process for breaking up a mixture of fluids or fluent substances into two or more components by centrifuging within a generally solid-walled, receptacle-like member.
