# US 5,349,908 A · Explosively forged elongated penetrator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,349,908 A - Document ID: US5349908A - Status: Granted - Kind: A - Application number: 08/011,996 - Filed: 1993-02-01 - Granted: 1994-09-27 - Earliest claimed: 1993-02-01 - Assignees: Nuclear Metals, Inc. - Inventors: Mark Walz; Richard J. Schoon - Web page: https://patentgrep.com/patent/US5349908A ## CPC - F42B 1/028: characterised by the form of the liner - F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D) ## Abstract An explosively forged elongated penetrator including a liner having a central section, an intermediate section and a peripheral section; the axial velocity of the sections being approximately equal; the axial thicknesses of the sections decreasing from the central to the peripheral section; the radial velocity increasing from the central to the peripheral section; and the line profile angle decreasing from the central to the peripheral section, to define an explosively driven, inwardly directed, centrally focused force for forging the penetrator from the liner substantially independently of the axial velocities. ## Claims ### Claim 1 An explosively forged elongated penetrator comprising: a liner having a central section, an intermediate section and a peripheral section; the axial velocity of said sections being approximately equal, the axial thickness of said sections decreasing from the central to the peripheral section; the radial velocity increasing from the central to the peripheral section; and the line profile angle decreasing from the central to the peripheral section; to define an inwardly directed centrally focused force for forging the penetrator from the liner substantially independently of the axial velocities. ### Claim 2 (depends on 1) The explosively forged elongated penetrator of claim 1 in which said liner has two surfaces, a convex surface and a concave surface. ### Claim 3 (depends on 2) The explosively forged elongated penetrator of claim 2 in which said liner is crescent shaped. ### Claim 4 (depends on 2) The explosively forged elongated penetrator of claim 2 in which said liner is concave in the direction of forward motion of the penetrator. ### Claim 5 (depends on 2) The explosively forged elongated penetrator of claim 2 in which said surfaces are circular arcs. ### Claim 6 (depends on 2) The explosively forged elongated penetrator of claim 2 in which said surfaces are defined by a sixth order quadratic equation. ### Claim 7 (depends on 1) The explosively forged elongated penetrator of claim 1 in which said axial velocities at the central, intermediate and peripheral sections are from 2 km/sec to 3 km/sec, 2 km/sec to 3 km/sec, and 2 km/sec to 3 km/sec, respectively. ### Claim 8 (depends on 1) The explosively forged elongated penetrator of claim 1 in which said axial thicknesses at the central, intermediate and peripheral sections are from 0.15 cm to 0.51 cm, 0.13 cm to 0.46 cm, and 0.07 cm to 0.38 cm. ### Claim 9 (depends on 1) The explosively forged elongated penetrator of claim 1 in which said radial velocities at the central, intermediate and peripheral sections are from 0 km/sec to 0.1 km/sec, 0.3 km/sec to 0.5 km/sec, and 0.4 kin/see to 0.7 kin/sec. ### Claim 10 (depends on 1) The explosively forged elongated penetrator of claim 1 in which said line profile angles at the central, intermediate and peripheral sections are from 90.degree. to 80.degree., 80.degree. to 60.degree., and 80.degree. to 50.degree.. ### Claim 11 An explosively forged elongated penetrator comprising: a case; an explosive initiation train mounted to the back of the case; a liner mounted at the front of the case; an explosive charge in said case between said explosive initiation train and said liner; said liner having a central section, an intermediate section and a peripheral section; the axial velocity of said sections being approximately equal, the axial thickness of said sections decreasing from the central to the peripheral section; the radial velocity increasing from the central to the peripheral section; and the line profile angle decreasing from the central to the peripheral section; to define an inwardly directed centrally focused force for forging the penetrator from the liner substantially independently of the axial velocities. ### Claim 12 (depends on 11) The explosively forged elongated penetrator of claim 11 in which said liner has two surfaces, a convex surface and a concave surface. ### Claim 13 (depends on 12) The explosively forged elongated penetrator of claim 12 in which said liner is crescent shaped. ### Claim 14 (depends on 12) The explosively forged elongated penetrator of claim 12 in which said liner is concave in the direction of forward motion of the penetrator. ### Claim 15 (depends on 12) The explosively forged elongated penetrator of claim 12 in which said surfaces are circular arcs. ### Claim 16 (depends on 12) The explosively forged elongated penetrator of claim 12 in which said surfaces are defined by a sixth order quadratic equation. ### Claim 17 (depends on 11) The explosively forged elongated penetrator of claim 11 in which said axial velocities at the central, intermediate and peripheral sections are from 2 km/sec to 3km/sec, 2 km/sec to 3 km/sec, and 2 km/sec to 3 km/sec, respectively. ### Claim 18 (depends on 11) The explosively forged elongated penetrator of claim 11 in which said axial thicknesses at the central, intermediate and peripheral sections are from 0.15 cm to 0.51 cm, 0.13 cm to 0.46 cm, and 0.07 cm to 0.38 cm. ### Claim 19 (depends on 11) The explosively forged elongated penetrator of claim 11 in which said radial velocities at the central, intermediate and peripheral sections are from 0 km/sec to 0.1 km/sec, 0.3 km/sec to 0.5 km/sec, and 0.4 km/sec to 0.7 km/sec. ### Claim 20 (depends on 11) The explosively forged elongated penetrator of claim 11 in which said line profile angles at the central, intermediate and peripheral sections are from 90.degree. to 80.degree., 80.degree. to 60.degree., and 80.degree. to 50.degree.. ### Claim 21 An integrated, interactive local warhead impediment and explosively forged penetration system comprising: a warhead assembly; a case; an explosive initiation train mounted to the back of the case; a liner mounted at the front of the case disposed between the case and warhead assembly; said liner having a central section, an intermediate section and a peripheral section; the axial velocity of said sections being approximately equal, the axial thickness of said sections decreasing from the central to the peripheral section; the radial velocity increasing from the central to the peripheral section; and the line profile angle decreasing from the central to the peripheral section; to define an inwardly directed centrally focused force for forging the penetrator from the liner substantially independently of the axial velocities. ### Claim 22 (depends on 21) The explosively forged elongated penetrator of claim 21 in which said liner has two surfaces, a convex surface and a concave surface. ### Claim 23 (depends on 22) The explosively forged elongated penetrator of claim 22 in which said liner is crescent shaped. ### Claim 24 (depends on 22) The explosively forged elongated penetrator of claim 22 in which said liner is concave in the direction of forward motion of the penetrator. ### Claim 25 (depends on 22) The explosively forged elongated penetrator of claim 22 in which said surfaces are circular arcs. ### Claim 26 (depends on 22) The explosively forged elongated penetrator of claim 22 in which said surfaces are defined by a sixth order quadratic equation. ### Claim 27 (depends on 21) The explosively forged elongated penetrator of claim 21 in which said axial velocities at the central, intermediate and peripheral sections are from 2 km/sec to 3 km/sec, 2 km/sec to 3 km/sec, and 2 km/sec to 3 km/sec, respectively. ### Claim 28 (depends on 21) The explosively forged elongated penetrator of claim 21 in which said axial thicknesses at the central, intermediate and peripheral sections are from 0.15 cm to 0.51 cm, 0.13 cm to 0.46 cm, and 0.07 cm to 0.38 cm. ### Claim 29 (depends on 21) The explosively forged elongated penetrator of claim 21 in which said radial velocities at the central, intermediate and peripheral sections are from 0 km/sec to 0.1 km/sec, 0.3 km/sec to 0.5 km/sec, and 0.4 km/sec to 0.7 km/sec. ### Claim 30 (depends on 21) The explosively forged elongated penetrator of claim 21 in which said line profile angles at the central, intermediate and peripheral sections are from 90.degree. to 80.degree., 80.degree. to 60.degree., and 80.degree. to 50.degree..