.~ With interstage discharge or additional discharge from former stage {1}
252
.~.~ Pressure responsive interstage discharge
DEFINITION
Classification: 417/252
(under subclass 251) Apparatus in which the discharge is between the stages and operates to discharge some or all of the fluid from the prior stage in response to the pressure of the pumped fluid at some point in the system.
(1) Note. The discharge is considered to be between the stages if it is intermediate the discharge control means for the prior stage and the intake control means for the subsequent stage (e.g., check valves, etc.).
