US PATENT SUBCLASS 417 / 428
.~ Bypass control

Current as of: June, 1999
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417 /   HD   PUMPS

426  DF  PLURAL PUMPS WITH INDIVIDUAL OR RELATIVE CONTROL {3}
428.~ Bypass control

DEFINITION

Classification: 417/428

(under subclass 426) Apparatus in which at least one of the pumps has means to bypass fluid from or around the pump to waste or back to supply and the control means is effective to control said bypass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

288, for plural pumps or chambers with condition responsive control of sequential operation of separate bypass or relief passages for the pumps or chambers.