# US 10,481,028 B2 · Pressure detection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,481,028 B2 - Document ID: US10481028B2 - Status: Granted - Kind: B2 - Application number: 15/900,163 - Filed: 2018-02-20 - Published: 2018-08-23 - Granted: 2019-11-19 - Earliest claimed: 2017-02-22 - Assignees: Surpass Industry Co., Ltd. - Applicants: Surpass Industry Co., Ltd. - Inventors: Hiroshi Imai; Masamichi Kobayashi - Web page: https://patentgrep.com/patent/US10481028B2 ## CPC - G01L 19/0023: {for flowthrough systems having a flexible pressure transmitting element} - A61M 1/3641: {Pressure isolators} - G01L 9/0051: {using variations in ohmic resistance} - G01L 9/0055: {bonded on a diaphragm} - G01L 13/025: {using diaphragms} - G01L 19/003: {using a detachable interface or adapter between the process medium and the pressure gauge} - G01L 19/0645: {using isolation membranes, specially adapted for protection} - G01L 19/144: {with dismountable parts, e.g. for maintenance purposes or for ensuring sterile conditions (for detachable interface or adapter between the process medium and the pressure gauge G01L19/003)} - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract Provided is a pressure detection device which includes a pressure detection unit and a flow passage unit. The pressure detection unit includes a pressure sensor including a diaphragm and a first connection portion joined to the diaphragm. The flow passage unit includes a diaphragm and a second connection portion joined to the diaphragm. One of the first connection portion and the second connection portion is formed of a magnet, and the other of the first connection portion and the second connection portion is formed of a magnet or a magnetic body. In a state where the flow passage unit is mounted on the pressure detection unit, the first connection portion and the second connection portion are disposed in a state where the first connection portion and the second connection portion are attracted to each other by a magnetic force. ## Claims ### Claim 1 A pressure detection device comprising: a pressure detection unit configured to detect a pressure transmitted to a pressure detecting portion; a flow passage unit in which a flow passage for introducing a fluid is formed; and a mounting mechanism configured to detachably mount the flow passage unit on the pressure detection unit, wherein the pressure detection unit includes: a pressure sensor including the pressure detecting portion; and a first connection portion joined to the pressure detecting portion, the flow passage unit includes: a pressure receiving portion configured to be displaced by receiving a pressure of the fluid flowing through the flow passage; and a second connection portion joined to the pressure receiving portion, one of the first connection portion and the second connection portion is formed of a magnet, and the other of the first connection portion and the second connection portion is formed of a magnet or a magnetic body, the mounting mechanism comprises a first fastening member mounted on the flow passage unit and a second fastening member mounted on the pressure detection unit, the first connection portion that is joined to the pressure detecting portion of the pressure detection unit and the second connection portion that is joined to the pressure receiving portion of the flow passage unit are brought into contact with each other by fastening the first fastening member to the second fastening member, and in a state where the flow passage unit is mounted on the pressure detection unit by the mounting mechanism, the first connection portion and the second connection portion are disposed in a state where the first connection portion and the second connection portion are attracted to and brought into contact with each other by a magnetic force, the second connection portion is disposed in an inner space defined by the pressure receiving portion and the pressure detecting portion, the first connection portion is joined to a surface of the pressure detecting portion which is not in contact with the inner space, and in the state where the flow passage unit is mounted on the pressure detection unit by the mounting mechanism, the first connection portion and the second connection portion are disposed in the state where the first connection portion and the second connection portion are attracted to each other by the magnetic force with the pressure detecting portion interposed between the first connection portion and the second connection portion. ### Claim 2 (depends on 1) The pressure detection device according to claim 1, wherein the first connection portion is formed of the magnet, and the second connection portion is formed of the magnetic body. ### Claim 3 (depends on 1) The pressure detection device according to claim 1, wherein an end surface of the first connection portion on a side of the flow passage unit is formed to have a planar shape, and an end surface of the second connection portion on a side of the pressure detection unit is formed to have a spherical shape which projects toward the first connection portion. ### Claim 4 (depends on 2) The pressure detection device according to claim 2, wherein an end surface of the first connection portion on a flow passage unit side is formed to have a planar shape, and an end surface of the second connection portion on a pressure detection unit side is formed to have a spherical shape which projects toward the first connection portion. ### Claim 5 (depends on 1) The pressure detection device according to claim 1, wherein the pressure detection unit has a communication flow passage configured to make an inner space defined by the pressure receiving portion and the pressure detecting portion and an outer space maintained at an atmospheric pressure communicate with each other. ### Claim 6 (depends on 1) The pressure detection device according to claim 1, wherein the pressure sensor outputs a pressure signal which corresponds to a deformation of the pressure detecting portion according to a change of a pressure transmitted to the pressure detecting portion. ### Claim 7 (depends on 1) The pressure detection device according to claim 1, wherein in the state where the flow passage unit is mounted on the pressure detection unit by the mounting mechanism, the first connection portion and the second connection portion are disposed in the state where the first connection portion and the second connection portion are attracted to and brought into direct contact with each other by the magnetic force. ### Claim 8 (depends on 1) The pressure detection device according to claim 1, wherein in the state where the flow passage unit is mounted on the pressure detection unit by the mounting mechanism, the first connection portion and the second connection portion are disposed in the state where the first connection portion and the second connection portion are attracted to and brought into contact with each other, via at least one cover portion, by the magnetic force. ### Claim 9 A pressure detection device comprising: a pressure detection unit configured to detect a pressure transmitted to a pressure detecting portion; a flow passage unit in which a flow passage for introducing a fluid is formed; and a mounting mechanism configured to detachably mount the flow passage unit on the pressure detection unit, wherein the pressure detection unit includes: a pressure sensor including the pressure detecting portion; and a first connection portion joined to the pressure detecting portion, the flow passage unit includes: a pressure receiving portion configured to be displaced by receiving a pressure of the fluid flowing through the flow passage; and a second connection portion joined to the pressure receiving portion, one of the first connection portion and the second connection portion is formed of a magnet, and the other of the first connection portion and the second connection portion is formed of a magnet or a magnetic body, in a state where the flow passage unit is mounted on the pressure detection unit by the mounting mechanism, the first connection portion and the second connection portion are disposed in a state where the first connection portion and the second connection portion are attracted to each other by a magnetic force, the second connection portion is disposed in an inner space defined by the pressure receiving portion and the pressure detecting portion, the first connection portion is joined to a surface of the pressure detecting portion which is not in contact with the inner space, and in the state where the flow passage unit is mounted on the pressure detection unit by the mounting mechanism, the first connection portion and the second connection portion are disposed in the state where the first connection portion and the second connection portion are attracted to each other by the magnetic force with the pressure detecting portion interposed between the first connection portion and the second connection portion.