公开(公告)号：US20210199102A1

公开(公告)日：2021-07-01

申请号：US17204593

申请日：2021-03-17

Applicant: Graco Minnesota Inc.

Inventor： Timothy S. Roman

IPC: F04B39/04 ,  F04B53/10 ,  F04B43/00 ,  F04B43/08

Abstract: A valve for a reciprocating pump includes a housing, a first chamber, a second chamber, a first valve element, and a second valve element. The housing includes an inlet and an outlet. The first and second chambers are within the housing. The first chamber includes a first valve seat and is fluidly connected to the inlet. The second chamber includes a second valve seat and is fluidly connected to the outlet. The first valve element is disposed in the first chamber and includes a spring-loaded check valve element. The second valve element is disposed in the second chamber and includes a buoyant material.

公开(公告)号：US10443594B2

公开(公告)日：2019-10-15

申请号：US15381753

申请日：2016-12-16

Applicant: Graco Minnesota Inc.

Inventor： Timothy S. Roman ,  Andrew J. Klaphake

IPC: F04B53/14 ,  F04B43/00 ,  F04B43/08 ,  F04B53/16 ,  F04B15/02 ,  F16J3/04

Abstract: A reciprocating pump includes a housing, a rod, and a bellows. The housing surrounds a bellows chamber and a displacement chamber. A portion of the rod extends through the opening in the endcap and into the bellows chamber of the housing. A cross-section of the rod includes a lobed shape. The bellows is connected to the housing and to the rod such that the bellows surrounds a portion of the rod.

公开(公告)号：US20170175728A1

公开(公告)日：2017-06-22

申请号：US15381772

申请日：2016-12-16

Applicant: Graco Minnesota Inc.

Inventor： Timothy S. Roman

IPC: F04B43/08 ,  F16K17/04 ,  F04B53/10

CPC classification number: F04B43/084 ,  F04B53/1002 ,  F04B53/1032 ,  F04B53/143 ,  F16K15/044 ,  F16K17/048 ,  F16K24/046

Abstract: A valve for a reciprocating pump includes a housing, a first chamber, a second chamber, a first valve element, and a second valve element. The housing includes an inlet and an outlet. The first and second chambers are within the housing. The first chamber includes a first valve seat and is fluidly connected to the inlet. The second chamber includes a second valve seat and is fluidly connected to the outlet. The first valve element is disposed in the first chamber and includes a spring-loaded check valve element. The second valve element is disposed in the second chamber and includes a buoyant material.