(under the class definition) Apparatus in which there is provided a plurality of working chambers, each having a working member moving therein, at least one other working member having to-and-fro motion whereby the working members expand and contract the respective working chambers.
SEE OR SEARCH CLASS
60, Power Plants,
698+, for a system of combined or convertible motors.
173, Tool Driving or Impacting,
105, for impact delivering devices having a separate motor to rotate a driven element.
