(under the class definition) Apparatus including means for
contact with or by the pump fluid effective to impart a continual motion to the pump fluid in a manner or direction other than that which is necessary to effect pumping of said fluid to cause solid material to remain suspended in, or become entrained with said pump fluid.
(1) Note. For classification in this subclass the means must be clearly disclosed as having an agitating or whirling function. A mere projection on or configuration of a piston or a cylinder which would incidentally agitate or whirl the pump fluid is not classified in this subclass unless such projection or configuration is specifically disclosed to perform such function.
(2) Note. Included under this definition are devices of the type having an expansible and contractible chamber other than that necessary to effect pumping into which pump fluid is drawn and subsequently expelled for the disclosed purpose of agitating the pump fluid.
SEE OR SEARCH CLASS
92, Expansible Chamber Devices,
173, for a piston having a rotation imparting fluid impinging surface thereon.
