# US 9,752,906 B2 · Flow volume detector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,906 B2 - Document ID: US9752906B2 - Status: Granted - Kind: B2 - Application number: 14/400,730 - Filed: 2012-05-21 - Published: 2015-05-21 - Granted: 2017-09-05 - Earliest claimed: 2012-05-21 - Assignees: Aichi Tokei Denki Co., Ltd. - Applicants: Hideyuki Suzuki - Inventors: Hideyuki Suzuki - Web page: https://patentgrep.com/patent/US9752906B2 ## CPC - G01F 1/58: by electromagnetic flowmeters - A61M 1/16: with membranes - A61M 1/1647: {with flow rate measurement of the dialysis fluid, upstream and downstream of the dialyser} - G01F 1/588: {combined constructions of electrodes, coils or magnetic circuits, accessories therefor} - G01F 15/02: Compensating or correcting for variations in pressure, density or temperature - A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means - A61M 2205/3324: PH measuring means - A61M 2205/3334: Measuring or controlling the flow rate - A61M 2205/3368: Temperature - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - 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 A base (41) includes a plurality of flow channels (33, 34) and detection sections (531, 541) for detecting the flow volumes of fluids flowing in the flow channels (33, 34). In the base (41), a blocking section (57) for blocking heat conduction between the flow channels (33, 34) is provided between the flow channels (33, 34). The blocking section (57) is configured of groove (58) formed in the base (41). ## Claims ### Claim 1 A flow volume detector which measures the flow volume of a dialysate in an artificial dialysis apparatus, the flow volume detector comprising: a base, a plurality of flow channels formed in the base; a lid plate fixed to an upper face of the base; and detecting sections arranged in the flow channels for detecting flow volumes of fluids flowing in the plurality of flow channels, wherein a blocking section for blocking heat conduction between the plurality of flow channels is provided between the plurality of flow channels, the blocking section is configured of a space including at least a groove formed through the base, the groove penetrates from a front face of the base toward a back face of the base. ### Claim 2 (depends on 1) The flow volume detector according to claim 1, wherein the blocking section is configured of a first groove formed through the base and a second groove formed in a position corresponding to the first groove in the lid plate. ### Claim 3 (depends on 1) The flow volume detector according to claim 1, wherein the detecting sections are arranged in a center part in a longitudinal direction of the groove. ### Claim 4 (depends on 1) The flow volume detector according to claim 1, wherein orifice-shaped measurement flow generating sections are formed in the flow channels, and the detecting sections are arranged in the measurement flow generating sections. ### Claim 5 (depends on 4) The flow volume detector according to claim 4, wherein, in the measurement flow generating sections, inclined parts are formed in both end parts in a direction in which fluids flow, and the inclined parts are formed such that the flow channels become narrower as the flow channels go toward the measurement flow generating sections. ### Claim 6 (depends on 4) The flow volume detector according to claim 4, wherein the detecting sections have terminals arranged in end parts on both sides in a width direction of the measurement flow generating sections, and the terminals detect electromotive forces developed by flowing fluids. ### Claim 7 (depends on 1) The flow volume detector according to claim 1, wherein the plurality of flow channels are configured of a pair of flow channels, and the pair of flow channels are respectively arranged in the same plane on both sides of the groove and sandwiching the groove. ### Claim 8 A flow volume detector which measures the flow volume of a dialysate in an artificial dialysis apparatus, the flow volume detector comprising: a base, a plurality of flow channels formed in the base; a lid plate fixed to an upper face of the base; and detecting sections arranged in the flow channels for detecting flow volumes of fluids flowing in the plurality of flow channels, wherein a blocking section for blocking heat conduction between the plurality of flow channels is provided between the plurality of flow channels, the blocking section is configured of a space including at least a groove formed in the base, the groove penetrates from a front face of the base toward a back face of the base, and wherein the flow channels comprise passages of connection pipes protruding from both end faces of the base, concave parts which are formed in both end parts of the base and are in communication with the passages of the connection pipes, groove parts formed at locations near to the center of the base in the concave parts, and measurement flow generating sections formed in an upper face of the base, wherein the groove parts are shallower than the concave parts and are arranged in positions higher than the passages, and the measurement flow generating sections are arranged in positions higher than the groove parts.