# US 5,271,558 A · Remotely controlled electrically actuated air flow control register > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,271,558 A - Document ID: US5271558A - Status: Granted - Kind: A - Application number: 08/006,459 - Filed: 1993-01-21 - Granted: 1993-12-21 - Earliest claimed: 1993-01-21 - Assignees: Hampton Electronics, Inc. - Inventors: Brian Hampton - Web page: https://patentgrep.com/patent/US5271558A ## CPC - F24F 3/044: Systems in which all treatment is given in the central station, i.e. all-air systems - F24F 13/06: Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser - 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) ## Abstract The invention is directed to a control system for an air delivery system having a supply duct through which air is delivered into at least one independently controlled zone or room through an air delivery register. The control system for one zone or room includes a wireless air flow control thermostat to transmit a wireless air flow control signal output to an electrically powered and electrically self sufficient register air flow control unit that controls the flow of the air through the register in response to receiving the wireless airflow control signal output. The electrically powered and electrically self sufficient register air flow control unit includes an electrical generator to provide power in response to flow of air through the register from the supply duct. The generated electric power is delivered to the register air flow control unit to thereby maintain the register flow control unit electrically self sufficient and free from the need of any outside electrical power source. ## Claims ### Claim 1 A control system for an air delivery system having a supply duct through which air is delivered into at least one independently controlled zone through an air delivery register, said control system for said one zone comprising: a wireless airflow control means to transmit a wireless airflow control signal output to an electrically powered and electrically self-sufficient register flow control means located at said air delivery register, said electrically powered and electrically self-sufficient register flow control means controlling the flow of said air through said register in response to receiving said wireless air flow control signal output, said electrically powered and electrically self-sufficient register flow control means including generating means to provide electrical power in response to flow of air through said register from said supply duct, said generated electric power being delivered to said register flow control means to thereby maintain said register flow control means electrically self-sufficient and free from the need of any outside electrical power source. ### Claim 2 (depends on 1) The control system of claim 1 wherein said air delivery system is a normally single zone HVAC unit. ### Claim 3 (depends on 2) The control system of claim 2 wherein said supply duct is a single air supply duct through which conditioned air is delivered. ### Claim 4 (depends on 3) The control system of claim 3 wherein said system includes a plurality of zones each zone having one or more conditioned air delivery registers, each coupled to said single air supply duct. ### Claim 5 (depends on 4) The control system of claim 4 wherein said wireless air flow control means acts as a thermostat to control said register flow control means. ### Claim 6 (depends on 5) The control system of claim 5 wherein said wireless temperature control signal output is characterized as a continuously transmitted wireless temperature control signal for as long as a desired setpoint temperature for an associated zone is either above or below an ambient temperature in said associated zone. ### Claim 7 (depends on 6) The control system of claim 6 wherein said generating means includes a rotary mounted turbine positioned upstream within a register supply duct associated with said conditioned air delivery register, said turbine drivingly coupled to a generator, to drive the same upon conditioned air flow against blades of said turbine, said generator providing said generated electric power to said register flow control means to thereby maintain said register flow control means electrically self-sufficient. ### Claim 8 (depends on 7) A control system of claim 7 wherein said register flow control means includes a rechargeable battery electrically coupled to a power supervisor and a battery charging means to receive a charge therefrom, said generated electric power is delivered to said power supervisor and battery charging means to provide a source of electrical battery charging power. ### Claim 9 (depends on 8) The flow control system of claim 8 wherein said register flow control means further includes an HVAC temperature detection means to determine when said HVAC unit is delivering heated or cooled condition air, said HVAC temperature detection means having an output signal to a logic means representative of either heating or cooling by said HVAC, said temperature detection mean including an air duct discharge temperature sensor. ### Claim 10 (depends on 9) The flow control system of claim 9 wherein said register flow control means includes a wireless airflow control signal detection means electrically coupled to a decoding means to provide an output signal to said logic means representative of whether an ambient temperature in a zone associated with said register flow control means is greater that a desired setpoint temperature of said zone or whether said decoding circuit output signal is representative of said ambient temperature in said zone being less than or equal than said desired setpoint temperature of said zone. ### Claim 11 (depends on 10) The control system of claim 10 wherein said power supervisor and recharge means is electrically coupled across said generator and said rechargeable battery, said power supervisor and recharging means providing an output signal to said logic means whenever said battery is fully charged. ### Claim 12 (depends on 11) The control system of claim 11 wherein said register flow control means includes a turbine/generator load control means coupled electrically to receive an output signal from said logic means, said logic means output signal controlling a loading of said generator so that said air turbine is braked thereby reducing flow of conditioned air past the air turbine and through said register into said zone. ### Claim 13 (depends on 12) The control system of claim 12 wherein said logic means provides said output signal which controls the loading of the generator when a preselected combination of output signals from said HVAC temperature detection means; said decoding mean, and said power supervisor and recharging means call for decrease air flow through said air delivery register. ### Claim 14 (depends on 13) The control system of claim 13 wherein said air turbine has turbine impeller blades integrally secured to a rotatably mounted hub, said hub acting as a rotor for said generator. ### Claim 15 (depends on 14) The control system of claim 14 wherein the turbine impeller blades are positioned on said hub in at least two off-set circumferential rows to thereby provide a blockage to air flow past said impeller blades when rotary motion of said hub carrying said turbine impeller blades is reduced. ### Claim 16 An airflow controllable register for controlling flow of air through the register from a register airflow supply duct in response to an externally provide control signal that commands said register airflow control unit to provide differing airflow rates through said register, said airflow controllable register comprising: a register flow control means having an electric power generating means that includes a rotary mounted air turbine positioned within said register airflow supply duct, said air turbine drivingly coupled to a generator to drive the same upon airflow against blades of said turbine, said generator providing electric power to said register flow control means to thereby maintain said register flow control means electrically self-sufficient, said register flow control means responsive to said externally provided control signal to provide a loading of said generator so that said air turbine is braked thereby obstructing airflow past said air turbine and through said register and controlling airflow. ### Claim 17 (depends on 16) The flow controllable air register of claim 16 wherein said register flow control means includes a rechargeable battery electrically coupled to a power supervising battery charging means to receive a charge therefrom, said generated electric power is delivered to said power supervising battery charging means to provide a source of electrical battery charging power. ### Claim 18 (depends on 15) The flow controllable air register of claim 15 wherein said air turbine has turbine impeller blades integrally secured to a rotatable mounted hub, said hub acting as a rotor for said generator. ### Claim 19 (depends on 16) The flow controllable air register of claim 16 wherein the turbine impeller blades are positioned on said hub in at least two off-set circumferential rows to thereby provide a blockage to air flow past said impeller blades when said rotary motion of said hub carrying said turbine impeller blades is reduced. ### Claim 20 A method comprising the step of: placing an air driven turbine coupled to drive a generator in an air flow path in an air circulating system, and loading the generator to cause the air driven turbine to reduce its rotary speed thereby obstructing air flow in the system and controlling air flow.