# US 11,306,997 B2 · Throwing device with two-stage propulsion system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,997 B2 - Document ID: US11306997B2 - Status: Granted - Kind: B2 - Application number: 16/990,055 - Filed: 2020-08-11 - Published: 2022-02-17 - Granted: 2022-04-19 - Earliest claimed: 2020-08-11 - Applicants: Jian-Lin Huang - Inventors: Jian-Lin Huang - Web page: https://patentgrep.com/patent/US11306997B2 ## CPC - F41F 3/045: adapted to be carried and used by a person, e.g. bazookas (F41F3/042 takes precedence) - F42B 3/16: {Pyrotechnic} delay initiators (F42B3/195 takes precedence; {programmable electronic delay initiators F42C11/065}) - A62C 3/025: {Fire extinguishing bombs; Projectiles and launchers therefor (launching apparatus for projectiles, missiles or torpedoes in general F41F1/00, F41F3/00, F41F7/00)} - A62C 19/00: Hand fire-extinguishers in which the extinguishing substance is expelled by an explosion; Exploding containers thrown into the fire - F42B 15/10: Missiles having a trajectory only in the air - F41F: APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS (smallarms F41C); LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B) - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) - 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) ## Abstract The present disclosure provides a throwing device with a launcher and a propulsion system. The propulsion system comprises a retardant set between two sections of propellant for delaying the combustion and reducing the generated smoke or heat while launching the propulsion system. The launcher comprises: a tube for containing the propulsion system; and a trigger for triggering the ignition cartridge. A screw hole is in center of a bottom of the first chamber; nozzles are located around the screw hole; and a collar with a hole fixed in the bottom of the first chamber, wherein the ignition cartridge is fixed in the screw hole by the collar. The ignition cartridge comprises an explosive primer, and the launcher further comprises a firing pin triggered by the trigger to hit the explosive primer. ## Claims ### Claim 1 A throwing device, comprising: a propulsion system including: a first section including a first chamber having a first propellant and an ignition cartridge for igniting the first propellant; a second section connected to the first section and including a second chamber having a second propellant; and a retardant set disposed between the first propellant and the second propellant for delaying combustion from the first propellant to the second propellant, the retardant set including a third propellant, and a dish formed with holes through a surface thereof proximal to the second propellant and for containing the third propellant, and the retardant set further including a mesh covering the dish and the third propellant, wherein the mesh of the retardant set is disposed to face the first propellant, and wherein the dish of the retardant set is disposed to face the second propellant; and a launcher including: a tube for containing the propulsion system; and a trigger for triggering the ignition cartridge. ### Claim 2 (depends on 1) The throwing device of claim 1, further comprising: a screw hole formed in a center of a bottom of the first chamber; nozzles disposed around the screw hole; and a collar formed with a hole and fixed in the screw hole, wherein the ignition cartridge is fixed in the screw hole via the collar. ### Claim 3 (depends on 2) The throwing device of claim 2, wherein the ignition cartridge includes an explosive primer, and the launcher further comprises a firing pin triggered by the trigger to hit the explosive primer. ### Claim 4 (depends on 3) The throwing device of claim 3, wherein the ignition cartridge includes a cartridge propellant. ### Claim 5 (depends on 1) The throwing device of claim 1, wherein the third propellant includes Sorbitol, Potassium Nitrate, and Sodium Bicarbonate, wherein the Sodium Bicarbonate to the Sorbitol and the Potassium Nitrate is about 15 to 100 in weight. ### Claim 6 (depends on 5) The throwing device of claim 5, wherein the Sorbitol to the Potassium Nitrate is about 35 to 65 in weight. ### Claim 7 (depends on 1) The throwing device of claim 1, wherein the retardant set comprises third propellant includes Sorbitol, Potassium Nitrate, and Iron Oxide. ### Claim 8 (depends on 1) The throwing device of claim 1, wherein the first propellant includes one or more combustion channels. ### Claim 9 (depends on 1) The throwing device of claim 1, wherein the second propellant includes one or more combustion channels. ### Claim 10 (depends on 1) The throwing device of claim 1, wherein the first chamber includes an open top and a bottom with holes. ### Claim 11 (depends on 10) The throwing device of claim 10, wherein the second chamber includes a bottom with holes, and the bottom of the second chamber is connected to the open top of the first chamber. ### Claim 12 (depends on 11) The throwing device of claim 11, wherein the retardant set is installed on the bottom of the second chamber. ### Claim 13 (depends on 12) The throwing device of claim 12, wherein a thickness of a space for containing the retardant set is about 1 cm. ### Claim 14 (depends on 1) The throwing device of claim 1, wherein an exposed surface of the first propellant is more than an exposed surface of the second propellant. ### Claim 15 (depends on 1) The throwing device of claim 1, further comprising a nozzle in a bottom of the first section. ### Claim 16 (depends on 15) The throwing device of claim 15, further comprising a space between the nozzle and the first propellant. ### Claim 17 (depends on 1) The throwing device of claim 1, further comprising a warhead over the second section. ### Claim 18 (depends on 1) The throwing device of claim 1, wherein the first propellant includes Sorbitol, Potassium Nitrate, and Iron Oxide, and the second propellant includes Sorbitol, Potassium Nitrate, and Iron Oxide. ### Claim 19 (depends on 1) The throwing device of claim 1, wherein each of the first propellant and the second propellant include Sorbitol and Potassium Nitrate, wherein the Sorbitol to the Potassium Nitrate is about 35 to 65 in weight.