Global Patent Index - EP 0550847 A3

EP 0550847 A3 19930908 - GUN BARREL

Title (en)

GUN BARREL

Publication

EP 0550847 A3 19930908 (DE)

Application

EP 92121123 A 19921211

Priority

DE 4200171 A 19920107

Abstract (en)

[origin: EP0550847A2] The invention relates to a gun barrel having rifling with a variable rifling angle and having a strip force R(x) (which acts when a round is fired) over the round path (x) in the gun barrel, the calibre d, the round mass mG, the mass moment of inertia J about the round longitudinal axis, the gas force P(x) on the base of the round and the speed of the round v(x) being predetermined. In order to achieve exact rifling (in the context of manufacturing tolerances) corresponding to diverse desired properties of the strip force, it is provided that the strip force R(x) be determined in accordance with R(x) = RmaxRn(x), where Rmax is the maximum value of the strip force which is dependent on a predetermined final rifling angle beta E, and Rn(x) is a predetermined, normalised strip-force behaviour with a specific rifling start, a specific initial rifling angle and a specific rifling profile, the course of the rifling on the calibre diameter being derived from the differential equation <IMAGE> and Rmax being determined for a predetermined final rifling angle beta E. <IMAGE>

IPC 1-7

F41A 21/18

IPC 8 full level

F41A 21/18 (2006.01)

CPC (source: EP US)

F41A 21/18 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

CH DE FR GB LI SE

DOCDB simple family (publication)

EP 0550847 A2 19930714; EP 0550847 A3 19930908; DE 4200171 A1 19930708; DE 4200171 C2 20010726; US 5337504 A 19940816

DOCDB simple family (application)

EP 92121123 A 19921211; DE 4200171 A 19920107; US 171793 A 19930107