(under the class definition) Apparatus comprising a plurality of separate pumping units each having a pumping member or a plurality of pumping members operable in a single pumping chamber one of said pumping members being operated by power means such as a motor or driven shaft and another of the pumping members being designed to be operated manually by an operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
374, for a pump which is alternatively motor or manually actuated.
