EP 0890814 B1 20030212 - Gun barrel
Title (en)
Gun barrel
Title (de)
Waffenrohr
Title (fr)
Tube de canon
Publication
Application
Priority
DE 19729294 A 19970709
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
IPC 8 full level
F41A 21/18 (2006.01)
CPC (source: EP US)
F41A 21/18 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0890814 A2 19990113; EP 0890814 A3 20000816; EP 0890814 B1 20030212; AT E232594 T1 20030215; DE 19729294 A1 19990114; DE 59807159 D1 20030320; ES 2190005 T3 20030716; JP 3626348 B2 20050309; JP H1172298 A 19990316; NO 982328 D0 19980522; NO 982328 L 19990111; US 6170187 B1 20010109
DOCDB simple family (application)
EP 98109071 A 19980519; AT 98109071 T 19980519; DE 19729294 A 19970709; DE 59807159 T 19980519; ES 98109071 T 19980519; JP 19281998 A 19980708; NO 982328 A 19980522; US 10917798 A 19980702