# US 9,750,965 B2 · Device for spraying a liquid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,965 B2 - Document ID: US9750965B2 - Status: Granted - Kind: B2 - Application number: 14/411,829 - Filed: 2013-06-27 - Published: 2015-06-18 - Granted: 2017-09-05 - Earliest claimed: 2012-06-29 - Assignees: Herakles - Applicants: Herakles - Inventors: Frederic Marlin - Web page: https://patentgrep.com/patent/US9750965B2 ## CPC - A62C 35/023: {the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas (for foam generation A62C5/02)} - A62C 5/006: {Extinguishants produced by combustion} - A62C 13/22: with incendiary substances producing pressure gas - A62C 37/44: only the sensor being in the danger zone - B05B 7/0006: {Spraying by means of explosions} - B05B 7/0475: {with means for deflecting the peripheral gas flow towards the central liquid flow (B05B7/0458 takes precedence)} - B05B 7/068: {the annular gas outlet being supplied by a gas conduit having an axially concave curved internal surface just upstream said outlet} - A62C 13/003: {Extinguishers with spraying and projection of extinguishing agents by pressurised gas} - A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10) - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) ## Abstract A spray device (100) for spraying a liquid (L), the device comprises a tank (10) containing the liquid (L) for spraying, at least one liquid ejector member (20) in communication with said tank (10), and a pyrotechnic gas generator (30) for pressurizing the liquid inside said tank and propelling it under pressure out from said tank. According to the invention, in at least one mode of operation, the ejector member (20) is in communication with the gas generator (30) in such a manner as to enable it to be fed with the gas generated by said generator (30). ## Claims ### Claim 1 A spray device for spraying a liquid, the device comprising: a tank containing the liquid for spraying; at least one liquid ejector member in communication with the tank; and a pyrotechnic gas generator for pressurizing the liquid inside the tank and propelling it under pressure out from the tank; wherein in at least one mode of operation, the ejector member is in communication with the gas generator in such a manner as to enable it to be fed directly with the gas generated by the gas generator; wherein the gas generator has a first gas generator unit having a first combustion chamber housing at least one first pyrotechnic charge, and a second gas generator unit having a second combustion chamber housing at least one second pyrotechnic charge, the first gas generator unit being arranged in such a manner that the gas generated in the first combustion chamber acts on the liquid to pressurize it and to propel it out from the tank, and the second gas generator unit being arranged so that, in at least one mode of operation, the gas generated in the second combustion chamber directly feeds the liquid ejector member, wherein the pyrotechnic gas generator includes a first ignitor adapted to fire the first pyrotechnic charge, and a second ignitor adapted to fire the second pyrotechnic charge independently of the first. ### Claim 2 (depends on 1) A spray device for spraying a liquid, according to claim 1, wherein the ejector member is a nozzle. ### Claim 3 (depends on 1) A spray device according to claim 1, wherein the ejector member is a two-fluid nozzle. ### Claim 4 (depends on 3) A spray device according to claim 3, wherein the two-fluid nozzle is an internal mixer nozzle. ### Claim 5 (depends on 3) A spray device according to claim 3, wherein the two-fluid nozzle is an external mixer nozzle. ### Claim 6 (depends on 1) A spray device according to claim 1, wherein the first gas generator unit is located at least in part inside the tank. ### Claim 7 (depends on 1) A spray device according to claim 1, wherein the second gas generator unit is configured for the gas that is released to act directly on the liquid. ### Claim 8 (depends on 1) A spray device according to claim 1, wherein the first gas generator unit is configured for the gas to act indirectly on the liquid via a movable separator member. ### Claim 9 (depends on 8) A spray device according to claim 8, wherein the movable separator member is a deformable membrane. ### Claim 10 (depends on 8) A spray device according to claim 8, wherein the movable separator member is a slidable piston. ### Claim 11 (depends on 1) A spray device according to claim 1, further including a temperature sensor inside the tank and a control member controlling the actuation of the second ignitor as a function of the temperature value measured inside the tank. ### Claim 12 (depends on 1) A spray device according to claim 1, further including a valve for controlling the flow rate of gas delivered into the ejector member and a temperature sensor situated inside the tank, the valve being controlled as a function of the temperature measured by the sensor. ### Claim 13 (depends on 8) A spray device according to claim 8, wherein the movable separator member is a flexible membrane.