The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1991
Filed:
Oct. 16, 1990
Rainer Diel, Dusseldorf, DE;
Achim Sippel, Ratingen, DE;
Jurgen Meyer, Cologne, DE;
Heinz-Josef Kruse, Ratingen, DE;
Rheinmetall GmbH, Dusseldorf, DE;
Abstract
A projectile arrangement including a subcaliber projectile body and a segmented, discardable propelling cage sabot provided with a common form locking zone for the transmission of the acceleration forces. To reduce the notch effect on the projectile body, and thus the danger of breakage, due to the conventional thread grooves in the form locking zone, particularly in long, slender penetrators made of a breakage susceptible tungsten heavy metal, a novel form locking connection for the inner form locking region between the propelling cage and the projectile body is provided. This novel form locking connection is characterized in that in the region of the form locking zone beneath the exterior gas pressure receiving surface of the sabot, only the exterior surface of the projectile body is provided with preferably annular microgrooves and the surrounding inner surface of the sabot is smooth. The microgrooves are produced preferably by non-cutting shaping such as, for example, rolling or pressing in, and are configured as arcuate recesses having a relatively flat groove bottom and pointed lands between adjacent recesses. When the projectile arrangement is fired, the microgrooves of the relatively hard projectile body press themselves into the previously smooth interior surface of the relatively soft sabot, and thus produce a corresponding form locking connection only at the moment of firing.