# US 12,601,417 B2 · Valve and fluid control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,601,417 B2 - Document ID: US12601417B2 - Status: Granted - Kind: B2 - Application number: 18/820,944 - Filed: 2024-08-30 - Published: 2024-12-26 - Granted: 2026-04-14 - Earliest claimed: 2022-03-04 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Yukiharu Kodama - Web page: https://patentgrep.com/patent/US12601417B2 ## CPC - F16K 25/00: Details relating to contact between valve members and seats (movement of valve members other than for opening and closing F16K29/00) - F16K 27/0236: {Diaphragm cut-off apparatus} - F04B 43/02: having plate-like flexible members, e.g. diaphragms (F04B43/14 takes precedence) - F04B 43/04: Pumps having electric drive - F16K 7/12: with flat, dished, or bowl-shaped diaphragm - F16K 7/17: the diaphragm being actuated by fluid pressure - F16K 15/144: {the closure elements being fixed along all or a part of their periphery} - F16K 51/00: Other details not peculiar to particular types of valves or cut-off apparatus - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) ## Abstract A valve includes a housing, a hole, a hole, a diaphragm, a seat, and a protrusion. The housing includes a housing member and a flat board that oppose each other, and a side wall connected to the housing member and the flat board, the side wall being capable of defining a valve chamber together with the housing member and the flat board. The hole is formed in the flat board, and connects the valve chamber and an outside of the valve to each other. The hole is formed in the housing member, and connects the valve chamber and the outside of the valve to each other. The diaphragm divides the valve chamber into a first space nearer the flat board and a second space nearer the housing member, and has a through-hole that allows the first space and the second space to communicate with each other. ## Claims ### Claim 1 A valve, comprising: a housing including a first wall and a second wall opposing to each other, and a side wall connected to the first wall and the second wall, the side wall being capable of defining a valve chamber together with the first wall and the second wall; a first hole provided in the first wall, and connecting the valve chamber and an outside to each other; a second hole provided in the second wall, and connecting the valve chamber and an outside to each other; a diaphragm dividing the valve chamber into a first space nearer the first wall and a second space nearer the second wall, and having a through-hole allowing the first space and the second space to communicate with each other; a seat protruding into the valve chamber from the first wall, and disposed to overlap the through-hole when the valve is viewed in a plan in a first direction, or viewed from the first wall to the second wall; and a protrusion disposed between the first hole and the seat when the valve is viewed, in a cross section, in a second direction perpendicular to the first direction, and disposed on the diaphragm or the first wall in the first space. ### Claim 2 (depends on 1) The valve according to claim 1, wherein the protrusion includes a first protrusion disposed on the diaphragm, and a second protrusion disposed on the first wall. ### Claim 3 (depends on 1) The valve according to claim 1, wherein the protrusion has a two-dimensional spiral shape. ### Claim 4 (depends on 1) The valve according to claim 1, wherein a surface of the protrusion has adhesion. ### Claim 5 (depends on 1) The valve according to claim 1, wherein the protrusion has a mesh shape. ### Claim 6 (depends on 1) The valve according to claim 1, wherein a distance between the protrusion disposed on the first wall and the diaphragm is shorter than a maximum dimension of the through-hole. ### Claim 7 (depends on 1) The valve according to claim 1, wherein a distance between the protrusion disposed on the diaphragm and the first wall is shorter than a maximum dimension of the through-hole. ### Claim 8 (depends on 1) The valve according to claim 1, wherein a dimension of the protrusion in the first direction is shorter than a dimension of the seat in the first direction. ### Claim 9 (depends on 1) A fluid control device, comprising: the valve according to claim 1; and a pump having a pump chamber communicating with the first hole. ### Claim 10 (depends on 1) The valve according to claim 1, wherein the protrusion is disposed in a ring shape to surround the seat when viewed in a plan in the first direction. ### Claim 11 (depends on 10) The valve according to claim 10, wherein the protrusion includes a first protrusion disposed on the diaphragm, and a second protrusion disposed on the first wall. ### Claim 12 (depends on 10) The valve according to claim 10, wherein a surface of the protrusion has adhesion. ### Claim 13 (depends on 10) The valve according to claim 10, wherein the protrusion has an entirely continuous circumference. ### Claim 14 (depends on 13) The valve according to claim 13, wherein the protrusion includes a first protrusion disposed on the diaphragm, and a second protrusion disposed on the first wall. ### Claim 15 (depends on 13) The valve according to claim 13, wherein a surface of the protrusion has adhesion. ### Claim 16 (depends on 10) The valve according to claim 10, wherein the protrusion has a circumference having a gap at a part. ### Claim 17 (depends on 16) The valve according to claim 16, wherein the protrusion includes a first protrusion disposed on the diaphragm, and a second protrusion disposed on the first wall. ### Claim 18 (depends on 16) The valve according to claim 16, wherein the gap is located at a position different from a position between the first hole and the seat when the valve is viewed, in a cross section, from a side in the second direction. ### Claim 19 (depends on 18) The valve according to claim 18, wherein the protrusion includes a first protrusion disposed on the diaphragm, and a second protrusion disposed on the first wall, and wherein the gap includes a first gap of the first protrusion and a second gap of the second protrusion, and the first gap and the second gap are located at different positions when viewed in a plan in the first direction. ### Claim 20 (depends on 18) The valve according to claim 18, wherein the protrusion includes a first protrusion disposed on the diaphragm, and a second protrusion disposed on the first wall.