| | US PATENT CLASS 417-- Class Notes |
 | | The combination of a rotary, nonexpan-sible chamber-type pump with another pump of a different type (e.g., recipro- cating, rotary expansible chamber, etc.), is excluded from Class 415 and is classified in Class 417 unless the different type pump is a mere auxiliary of the rotary, nonexpansible chamber-type pump (e.g., lubricating or coolant pump). |
 | | fluid to or release of the fluid from the bias area for the disclosed purpose of bypassing said fluid or conducting it to another point of use such devices are excluded from Class 418 and are classified in Class 417 if otherwise appropriate. |
 | | Also Class 418 excludes a pump having a movable chamber part whose movement is controlled in response to the pressure or flow of the pumped fluid of a second rotary expansible chamber device. |
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