# US 10,864,562 B1 · Airflow capture hood flow correction system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,864,562 B1 - Document ID: US10864562B1 - Status: Granted - Kind: B1 - Application number: 15/712,018 - Filed: 2017-09-21 - Granted: 2020-12-15 - Earliest claimed: 2017-09-21 - Assignees: Evergreen Telemetry LLC - Applicants: Evergreen Telemetry LLC - Inventors: Russell Peter Secor - Web page: https://patentgrep.com/patent/US10864562B1 ## CPC - B08B 15/02: using chambers or hoods covering the area {(B08B15/002 takes precedence)} - F24F 11/0001: {for ventilation (F24F11/30 takes precedence)} - F24F 11/30: for purposes related to the operation of the system, e.g. for safety or monitoring - F24F 11/72: for controlling the supply of treated air, e.g. its pressure - G01F 1/34: by measuring pressure or differential pressure - F24F 2110/00: Control inputs relating to air properties - F24F 2110/30: Velocity - G05B 2219/24084: Remote and local monitoring, local result to remote, remote takes action - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) ## Abstract Implementations of an airflow capture hood flow control ring may include a flexible ring including a toroidal shape configured to couple around a base of an airflow capture hood. The ring may be configured to permit an airflow sensor coupled to the airflow capture hood coupled to an inlet to measure a flow of air into the inlet with at least 90% accuracy. ## Claims ### Claim 1 An airflow capture hood flow control system comprising: an airflow capture hood comprising a collapsible base coupled around a grid, the grid configured to measure a passage of air through the airflow capture hood; and a flexible ring comprising a toroidal shape configured to removably couple around an outer surface of the collapsible base of the airflow capture hood; wherein the flexible ring is configured to removably couple around the outer surface of the base of the airflow capture hood through compression via an elastic bias force created by stretching then placing the flexible ring around the airflow capture hood. ### Claim 2 (depends on 1) The airflow capture hood flow control system of claim 1, wherein a diameter of a cross section of the flexible ring is substantially two inches. ### Claim 3 (depends on 1) The airflow capture hood flow control system of claim 1, wherein a diameter of a cross section of the flexible ring is substantially three inches. ### Claim 4 (depends on 1) The airflow capture hood flow control system of claim 1, wherein a diameter of a cross section of the flexible ring is more than three inches. ### Claim 5 (depends on 1) The airflow capture hood flow control system of claim 1, wherein the flexible ring comprises a foam covered by vinyl. ### Claim 6 (depends on 1) The airflow capture hood flow control system of claim 1, wherein the collapsible base comprises a portion of a pliable skirt coupled around the grid. ### Claim 7 An airflow capture hood flow control system comprising: an airflow capture hood comprising a pliable skirt coupled around a grid; and a ring removably coupled around an outer surface of a base of the pliable skirt; wherein a cross section of the ring has a diameter of substantially three inches; and wherein an inner circumference of the ring when the ring is not coupled to the airflow capture hood is less than an outer circumference of the outer surface of the base of the pliable skirt. ### Claim 8 (depends on 7) The airflow capture hood flow control system of claim 7, wherein the ring extends below the airflow capture hood. ### Claim 9 (depends on 7) The airflow capture hood flow control system of claim 7, wherein the ring forms one of a toroid and a rectangular shaped ring. ### Claim 10 (depends on 7) The airflow capture hood flow control system of claim 7, wherein the ring is held to the airflow capture hood by pressure between the ring and a base of the airflow capture hood. ### Claim 11 (depends on 7) The airflow capture hood flow control system of claim 7, wherein an outer surface of a base of the airflow capture hood is pliable. ### Claim 12 An airflow capture hood flow control system comprising: an airflow capture hood comprising a grid coupled to a pliable base of the airflow capture hood; and a ring coupled around an outer surface of the base of the airflow capture hood; wherein the ring comprises a foam covered by vinyl; and wherein the grid retains an opening in an open configuration in the base of the airflow capture hood. ### Claim 13 (depends on 12) The airflow capture hood flow control system of claim 12, wherein the ring forms one of a toroid and a rectangle ring shape. ### Claim 14 (depends on 12) The airflow capture hood flow control system of claim 12, wherein the ring extends below the airflow capture hood. ### Claim 15 (depends on 12) The airflow capture hood flow control system of claim 12, wherein the foam is at least 3 inches thick. ### Claim 16 (depends on 12) The airflow capture hood flow control system of claim 12, wherein the outer surface of the base of the airflow capture hood is pliable.