# US 5,341,718 A · Launched torpedo decoy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,341,718 A - Document ID: US5341718A - Status: Granted - Kind: A - Application number: 08/110,257 - Filed: 1993-08-19 - Granted: 1994-08-30 - Earliest claimed: 1993-08-19 - Assignees: The United States of America as represented by the Secretary of the Navy - Inventors: Robert C. Woodall, Jr.; S. Kyle Jones; H. Joseph Jones, Jr. - Web page: https://patentgrep.com/patent/US5341718A ## CPC - B63G 9/02: Means for protecting vessels against torpedo attack (armoured hulls B63B3/10) - F42B 15/22: Missiles having a trajectory finishing below water surface (having additional propulsion means for movement through water F42B17/00) - B63G: OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS (means of attack or defence in general, e.g. turrets F41H) - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) ## Abstract An acoustic decoy round ejected by a launcher for flight above water from a ea-going vessel, impacts at the water surface to cause separation of a payload from a forward section of the round that is also separated from a flotation anchor tethered to the payload and fins which stabilized launched flight of the round prior to impact. The separated payload submerges from the flotation anchor at the water surface location to a tethered depth within the water from which a decoy signal is emitted. ## Claims ### Claim 1 In combination with a launching system, a decoy round adapted to be deployed from a marine vessel, including: aft and forward sections interconnected with each other, fin means mounted on the aft section for flight stabilization of the round during travel above water from the vessel, separation means responsive to impact of the round with the water upon completion of said travel thereof for separating the sections of the round from each other, payload means within the forward section of the round for generating an acoustical signal in response to submergence thereof within the water following said separation of the sections of the round, flotation means mounted within the round and inflated in response to said impact with the water for anchoring the payload means and tethering means connecting the flotation means to the payload means for limiting said submergence thereof while anchored by the flotation means to a predetermined depth at which the acoustical signal is emitted. ### Claim 2 (depends on 1) The decoy round as defined in claim 1, including spring means for displacement of the payload means from the forward section in response to said separation of the sections from each other. ### Claim 3 (depends on 1) The decoy round as defined in claim 1, including arming means responsive to launch from the vessel for enabling the separation means. ### Claim 4 (depends on 3) The decoy round as defined in claim 3, including spring means for displacement of the payload means from the forward section in response to said separation of the sections from each other. ### Claim 5 In a system for launching an acoustical decoy from a marine vessel in response to detection of approach of an underwater torpedo, a program for deployment of the decoy including the steps of: simultaneously stabilizing flight of the decoy and enabling operation thereof in response to powered launch from the vessel; separating the decoy into a flotation anchor and a payload in response to impact of the decoy with water upon completion of said flight thereof; and emitting acoustical signals from the separated payload in response to submergence thereof to a tethered depth within the water below the flotation anchor. ### Claim 6 In combination with a system for propelling a powered signaling device to a water surface location, enclosure means for protectively transporting said signaling device during travel thereof, means carried by the enclosure means for stabilizing said travel of the signaling device to the water surface location, explosive means responsive to impact of the enclosure means at said water surface location for separating the signaling device from the enclosure means and flotation anchoring means mounted by the enclosure means and connected to the signaling device for limiting submergence thereof to a tethered depth below said water surface location. ### Claim 7 (depends on 6) The combination of claim 6 including safety arming means within the enclosure means for enabling said explosive means and the flotation anchoring means in response to launch. ### Claim 8 (depends on 7) The combination of claim 7 wherein said means for stabilizing includes fins projected during said travel of the enclosure means. ### Claim 9 (depends on 8) The combination of claim 8 wherein means for stabilizing said travel further includes a parachute deployed from the enclosure means prior to said impact thereof at the water surface location. ### Claim 10 (depends on 9) The combination of claim 9 wherein the system for propelling includes a rocket motor from which the fins are projected.