.~ Pump - motor unit raised in vertical conduit by pressure fluid applied below unit
DEFINITION
Classification: 417/358
(under subclass 321) Apparatus in which the pump and motor are carried in or from unitary structure which is movable through a vertically disposed fluid conduit by fluid under pressure applied beneath the structure to elevate the pump and motor from a working position at the lower end of the conduit to an inoperative position at the upper end.
