US PATENT SUBCLASS 417 / 429
.~ Adjustment with respect to common drive

Current as of: June, 1999
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417 /   HD   PUMPS

426  DF  PLURAL PUMPS WITH INDIVIDUAL OR RELATIVE CONTROL {3}
429.~ Adjustment with respect to common drive

DEFINITION

Classification: 417/429

(under subclass 426) Apparatus in which the pumping units are driven by a single common drive member (e.g., shaft) and the control means is effective to change the relationship of at least one of the pumps with respect to the drive member.

(1) Note. The change in relationship of the pump to the drive member may be disconnection therefrom.