(under the class definition) Apparatus including means for separating or filtering a foreign material from a fluid which is adapted to contact a portion of the working member to enhance the operation of some portion of the expansible chamber device (e.g., working fluid or lubricant).
(1) Note. Included under this definition are means for removing a gaseous fluid from a hydraulic fluid, including means for bleeding or venting a space designed to receive a liquid, but which may have become filled with a gaseous fluid.
(2) Note. Class 96 or Class 210 which are directed to fluid purification take a fluid purification means (e.g., filter) when claimed, per se, or in combination with an enclosure even though disclosed as a cylinder or working chamber for an expansible chamber device, regardless of the disclosed use of such means. Class 96 or Class 210 also take the combination of an expansible chamber device of the type set forth in the class definition of the class (92), (A)(1), combined with detailed means to purify the working fluid thereof positioned either upstream or downstream of the expansible chamber device unless there is a specific disclosure that such purification is for the purpose of protecting some portion of
the expansible chamber device.
Class 92 takes the combination of an expansible chamber device with a specific fluid purification means where such purification means is specifically disclosed as protecting some portion of the expansible chamber device. Class 92 also takes the combination of an expansible chamber device and a nominally recited purification means regardless of the disclosed purpose of such means. Recitations such as "a filter", "a filter in the inlet line", "a filter adjacent a port or opening" are considered nominal recitations of a purification means and patents containing such recitations are classified in Class 92 regardless of the disclosed purpose of such means.
(3) Note. The combination of an expansible chamber device of the type set forth in the Class Definition of this class (92) section (A)(1), with a nominally recited working fluid purifying means of the type which constitutes subject matter for Class 96 or Class 210 as set forth in (2) Note is excluded from this subclass. For the purpose of classification in Class 92, the nominal purifying means will be ignored and classification will be on other features with cross-referencing in appropriate subclasses in Class 96 or Class 210.
SEE OR SEARCH CLASS 96, Gas Separation: Apparatus, for apparatus for gas separation. (See (2) Note and (3) Note above.)
123, Internal-Combustion Engines,
41.86, for crankcase ventilation of an internal combustion engine, including fluid purifying means.
210, Liquid Purification or Separation, appropriate subclasses for means for separating from a liquid of any character of material.
220, Receptacles,
366.1, and 367.1+ for a vented closure for a container in which the vented closure may include filtering means. Class 220 takes a nominally recited cylinder, crankcase or engine block provided with a specific vented closure including filtering means.
