DISCHARGE PUMP, CONTROLLED BY VALVES AND WITH VALVE NEUTRALIZATION SYSTEM.

摘要

The invention relates to a valve-controlled discharge pump provided with a valve neutralization system. BR/ This valve neutralization system makes it possible, if necessary, to open or maintain in open condition an inlet valve (12), operating in the manner of a check valve, a working chamber (15) of the corresponding piston (11) so that this working chamber remains connected, also during the working stroke of the piston constituting the delivery member, with the inlet side of the apparatus and that the piston or associated discharge member can not work effectively the arrangement according to the invention is particularly suitable for radial piston pumps. / P