US PATENT SUBCLASS 417 / 3
.~.~ Pumps in parallel flow paths with common inflow or outflow

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
2  DF  .~ Plural pumps having separate drive motors, supply sources, or delivery destinations {1}
3.~.~ Pumps in parallel flow paths with common inflow or outflow {1}
4  DF  .~.~.~> Having means sensing condition in common inflow or outflow line {1}

DEFINITION

Classification: 417/3

(under subclass 2) Subject matter in which each of said plural pumps has its respective inlet or outlet connected to a single flow line so that fluid will flow either to or from said pumps through said flow line.

(1) Note. For purposes of this definition, a common inflow or outflow line is defined as a conduit or tank in that portion of the system which handles fluid flow to or from two or more pumps. Patents disclosing parallel flow paths in which a pressure condition is sensed in one path only, but for the disclosed purpose of indicating the common flow line pressure condition, have been placed in subclass 2, above, and appropriately cross-referenced into this subclass or those indented hereunder.