# US 2014/0191058 A1 · Method for the expulsion of a plant protection composition and spray gun > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191058 A1 - Document ID: US20140191058A1 - Status: Published application - Kind: A1 - Application number: 14/240,506 - Filed: 2012-08-23 - Published: 2014-07-10 - Earliest claimed: 2011-08-26 - Assignees: BASF SE - Inventors: Claude Taranta; Peter Welter; Gunter Niesar; Marc Nolte; Antonio Zarco Montero; Jose Antonio Torres Morato; Steffen Henkes - Web page: https://patentgrep.com/patent/US20140191058A1 ## CPC - A01M 7/0046: {Hand-operated sprayers (apparatus to be carried on or by a person B05B9/08)} - A01M 21/043: {by chemicals} - B05B 9/0833: {comprising a compressed gas container, e.g. a nitrogen cartridge} - B05B 9/0838: {supply being effected by follower in container, e.g. membrane or floating piston, or by deformation of container} - B05B 9/085: {with a liquid pump} - B05B 12/02: for controlling time, or sequence, of delivery - A01M: CATCHING, TRAPPING OR SCARING OF ANIMALS (appliances for catching swarms or drone-catching A01K57/00; fishing A01K69/00 - {A01K99/00}; biocides, pest repellants or attractants A01N); APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS - 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 The invention relates to a method for ejecting a pesticide by means of a fluid chamber 3, which communicates via an electrically controlled fluid valve 48 having a spout 22. The method comprises the following steps: determining a pressure and a duration of a time interval for ejecting the pesticide, filling the pesticide into the fluid chamber 3, applying a defined pressure on the pesticide in the fluid chamber 3 and opening the fluid valve 48 by means of an electric control signal for a specific, previously determined time interval and closing the fluid valve 48 after the time interval has expired, so that a defined volume or a defined weight of the pesticide is ejected by the spout 22. The invention further relates to a spray gun for carrying out the method and to the use of said spray gun for ejecting liquid, in particular gel-like, pesticide. ## Claims ### Claim at position 1 1-18. (canceled) ### Claim 19 A method for the expulsion of a plant protection composition by means of a fluid chamber (3) which communicates with a spray orifice (22) via an electrically activatable fluid valve (48), the method comprising setting a pressure and a length of a time interval for the expulsion of the plant protection composition, filling the plant protection composition into the fluid chamber (3), exerting the previously set pressure on the plant protection composition located in the fluid chamber (3), and opening the fluid valve (48) for the previously set time interval by means of an electric control signal and closing the fluid valve (48) after the end of the time interval so that a defined volume or a defined weight of the plant protection composition is expelled through the spray orifice (22). ### Claim 20 (depends on 19) The method according to claim 19, wherein the pressure which is exerted on the plant protection composition located in the fluid chamber (3) is kept constant during the time interval in which the fluid valve (48) is open. ### Claim 21 (depends on 19) The method according to claim 19, wherein the pressure exerted on the plant protection composition located in the fluid chamber (3) is generated by means of a pressurized gas or a pump. ### Claim 22 (depends on 19) The method according to claim 19, wherein the distance between the fluid valve (48) and the spray orifice (22) is less than 50 cm. ### Claim 23 (depends on 19) The method according to claim 19, wherein the fluid valve (48) is arranged directly at the spray orifice (22). ### Claim 24 (depends on 19) The method according to claim 19, wherein the plant protection composition is a gel-like fluid which has at 25° C. a dynamic viscosity which is determined by Brookfield's rotational viscometry with a shear gradient of 100 s−1 and is in the range of from 30 to 1000 mPa·s. ### Claim 25 (depends on 19) The method according to claim 19, wherein the rheological properties of the plant protection composition change within a temperature range of from 15° C. to 35° C. only such that the quantity expelled per unit time at a given pressure at a particular spray orifice (22) fluctuates only in a range of +/−10%. ### Claim 26 (depends on 19) The method according to claim 19, wherein the length of the time interval is set by a previously carried out calibration in which the dependence of the expelled volume or weight of a plant protection composition of a particular viscosity on the exerted pressure and the length of the time interval is determined. ### Claim 27 A spray gun for the expulsion of a fluid having a fluid chamber (3), a spray orifice (22) which communicates with the fluid chamber (3), and a pressure device (1, 2, 4, 16, 17, 18, 56) which is coupled to the fluid chamber (3) and by means of which a pressure can be exerted on the fluid located in the fluid chamber (3), wherein an electrically activatable fluid valve (48) for opening and closing the passage from the fluid chamber (3) to the spray orifice (22) is arranged at the spray orifice (22) and the fluid valve (48) is data-coupled to an electric control device (28) by way of which an electric control signal for opening the fluid valve (48) for a particular previously set time interval and for closing the fluid valve (48) after the end of the time interval can be generated so that a defined volume or a defined weight of the fluid is expelled via the spray orifice (22). ### Claim 28 (depends on 27) The spray gun according to claim 27, wherein said fluid is a plant protection composition. ### Claim 29 (depends on 27) The spray gun according to claim 27, wherein the control device (28) comprises a memory (54) for storing a previously set pressure and the previously set length of the time interval. ### Claim 30 (depends on 27) The spray gun according to claim 27, wherein the pressure device (1, 2, 4, 16, 17, 18, 56) comprises a fluid pump (56), by means of which the pressure can be exerted on the fluid located in the fluid chamber (3). ### Claim 31 (depends on 27) The spray gun according to claim 27, wherein the pressure device (1, 2, 4, 16, 17, 18, 56) comprises a compressed gas line (16) which is coupled to the fluid chamber (3) for exerting the pressure on the fluid located in the fluid chamber (3). ### Claim 32 (depends on 27) The spray gun according to claim 27, wherein the fluid chamber (3) and the spray orifice (22) are connected together via a connecting line (20), and wherein the fluid valve (48) is arranged adjacent to the spray orifice (22) in the connecting line (20). ### Claim 33 (depends on 27) The spray gun according to claim 27, wherein the distance between the fluid valve (48) and the spray orifice (22) is less than 50 cm. ### Claim 34 (depends on 27) The spray gun according to claim 27, wherein the fluid valve (48) is arranged directly at the spray orifice (22). ### Claim 35 (depends on 27) The spray gun according to claim 27, wherein the spray gun is configured for a gel-like plant protection composition and the spray orifice is surrounded by a spray nozzle (22) which generates a jet (23) when the gel-like plant protection composition passes through.