Aktiebolaget Bofors

Kjell Eriksson

Sven Lindberg

A breech mechanism for large caliber artillery pieces is characterized by a specifically designed sealing function in the form of an intermediate layer between a main portion of the breech mechanism and a seating portion displaceable in relation thereto by the gas pressure in the gun. The seating portion, on being displaced towards the breech, compresses the intermediate layer disposed therebetween and consisting of an elastically deformable refractory material which, on its deformation, is urged into tight abutment against the rear portion of the gun barrel about the loading space of the gun along a gap between the seating portion and the main portion of the breech mechanism.

Breech mechanisms

An improved gun barrel is disclosed in which the breech chamber has a length (B) and diameter (D.sub.2) which are chosen relative to the axial spacing (a) between a forward guiding ring (8) and a rearward driving band (6) of the ammunition unit to be fired from the barrel and relative to the diameters (d.sub.1 and d.sub.2) of the guiding ring and driving band, so that the longitudinal axis of the ammunition unit and the bore of the barrel are substantially aligned before the forward guiding ring enters the rifled portion of the bore.

Growing community of inventors

Karlskoga, Sweden

Kjell Eriksson