Hydraulic pump equipped with a pump valve

摘要

A hydraulic pump of the multistage type includes delivery orifices (A-G) distributed at the periphery of the outer wheel (1) inside the delivery casing and controlled by delivery valves. The delivery valves are each made up of a leaf spring tongue carrying a valve disc and an extension which are applied to a valve seat. The leaf springs are arranged laterally on an annulus (5) surrounding the outer wheel and extending over part of the circumference parallel to the annulus. <IMAGE>