(under subclass 151) Apparatus combined with heat exchange means to reduce the temperature of the motive fluid or the pumped fluid or both other than by a mere direct interchange of heat between the motive and pumped fluids.
(1) Note. This definition excludes the injection of one fluid into another fluid even though for the sole disclosed purpose of cooling if the injected fluid has a pumping effect on the other fluid by a jet or entrainment action (i.e., transfer or velocity energy).
SEE OR SEARCH THIS CLASS, SUBCLASS:
153, for vapor condensation vacuum diffusion-type pumps with cooling means.
164, for successive introduction of motive fluid into the pumped fluid with cooling means between the stages of pumping.
