Global patent index - EP 0890814 A3

EP 0890814 A3 2000-08-16 - Gun barrel

Title (en)

Gun barrel

Title (de)

Waffenrohr

Title (fr)

Tube de canon

Publication

EP 0890814 A3 (DE)

Application

EP 98109071 A

Priority

DE 19729294 A

Abstract (en)

[origin: EP0890814A2] A gunbarrel is drawn, with rifling lands and grooves all the way round the periphery. The amount of missile guide-band material (9) displaced remains the same when the number of grooves (3) is increased, while the groove depth (6) and the twist angle (d) remain constant. To reduce the rate of band wear when the number of grooves is increased, the groove flanks (5) can be at right angles to be bottom (7). The flank angle(a) can be less then 9.5 degrees with a non-chromium-plated bore, and 0 degrees when this is partly or wholly chromium-plated. The radius (rZ) between the groove bottom and flank can be less than 0.5mm, and that between the flank and the land surface (rF) less than 0.3mm.

IPC 1-7 (main, further and additional classification)

F41A 21/18

IPC 8 full level (invention and additional information)

F41A 21/18 (2006.01)

CPC (invention and additional information)

F41A 21/18 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0890814 A2 19990113; EP 0890814 A3 20000816; EP 0890814 B1 20030212; AT 232594 T 20030215; DE 19729294 A1 19990114; ES 2190005 T3 20030716; JP 3626348 B2 20050309; JP H1172298 A 19990316; NO 982328 A 19990111; NO 982328 D0 19980522; US 6170187 B1 20010109

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