公开(公告)号：US10711754B2

公开(公告)日：2020-07-14

申请号：US15833156

申请日：2017-12-06

Applicant: Caterpillar Inc.

Inventor： Bryan Edward Nelson ,  Sana Mahmood ,  Stephen R Lewis

IPC: F02M63/00 ,  F02M59/46 ,  F02M51/06 ,  F04B1/0452 ,  F04B7/00 ,  F02M59/36 ,  F02M47/02

Abstract: A valve assembly for a pump includes an electrical actuator having a stator and an armature, where the armature includes a top armature surface facing the stator and having an inwardly stepped-up profile that forms a raised surface at a radially inward location, and a lower, gap-forming surface at a radially outward location that forms a gap between the armature and the stator when the electrical actuator is activated to facilitate displacing fluid and avoiding production of high velocity, potentially damaging fluid flows.