(under the class definition) Apparatus including means such as a pump for exerting a force upon a fluid to remove such fluid from a space in the expansible chamber device, other than the working chamber.
SEE OR SEARCH CLASS
60, Power Plants,
325+, for a pump in communication with the working chamber of an expansible chamber device where the pump is more than nominally claimed. Class 60 takes such combination even though the pump is disclosed for the purpose of draining condensation or other extraneous fluid from the working chamber.
123, Internal-Combustion Engines,
41.86, for crankcase ventilation for an internal combustion engine, including pump means to force fluid from the crankcase.
