公开(公告)号：US20170226999A1

公开(公告)日：2017-08-10

申请号：US15490692

申请日：2017-04-18

Applicant: Graco Minnesota Inc.

Inventor： Jason J. Willoughby ,  David C. Polovitz ,  David M. Behrens

IPC: F04B49/10 ,  F04B15/02 ,  F04B53/16 ,  F04B43/02

CPC classification number: F04B49/10 ,  F04B15/02 ,  F04B43/025 ,  F04B43/073 ,  F04B43/0736 ,  F04B53/16

Abstract: A fluid cover for a displacement pump includes an inlet and an outlet oriented to provide desired flow characteristics to fluid entering a fluid chamber defined between the fluid cover and a diaphragm. The inlet is positioned to provide fluid to the fluid chamber at an oblique angle relative to the fluid cover. The oblique angle prevents the fluid from impinging on the fluid cover and the diaphragm, thereby maintaining a fluid velocity within the fluid chamber. The fluid velocity and rotational movement of the fluid facilitates flushing of the fluid chamber, as areas of low velocity or no velocity are eliminated from the fluid chamber, thereby preventing residuals from settling within the fluid chamber. The outlet is also positioned at an oblique angle to the fluid cover to maintain the rotational movement of the fluid flow.

公开(公告)号：US20230271211A1

公开(公告)日：2023-08-31

申请号：US18018026

申请日：2021-07-21

Applicant: Graco Minnesota Inc.

Inventor： Jason J. Willoughby ,  Timothy S. Roman ,  David C. Polovitz ,  Willem M. Tieleman

IPC: B05B12/08 ,  G05D16/00 ,  G05D16/06

CPC classification number: B05B12/088 ,  G05D16/024 ,  G05D16/0655

Abstract: A back pressure regulator (“BPR”) includes a pressure housing that at least partially defines a flow chamber that the liquid flows through and the BPR has an adjustable restriction that varies with the flow rate to maintain an upstream liquid pressure. The pressure housing is contoured to distribute the liquid flow to provide radial flow into the adjustable restriction from circumferentially about the adjustable restriction. The pressure housing includes ramped and curved side passages that guide the flow and ridges that divide the flow and prevent internal collisions between the flow. A flow deflector extends into the chamber outlet to prevent the radial flows through the annular restriction from colliding. The flow deflector redirects the flows to smoothly recombine in the chamber outlet.