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:
Jul. 22, 1980
Filed:
Jul. 15, 1977
Nils-Erik Gunners, 13700 Vasterhaninge, SE;
Rune V Hellgren, 11623 Stockholm, SE;
Torsten Liljergren, 14032 Grodinge, SE;
Other;
Abstract
A gun-launched projectile with a chamber for generation of combustion gases from a propellant grain is disclosed. The chamber is arranged with at least one gas outlet in its base plane, said propellant grain having a burning area, mass and static burning rate so related with the area of the gas outlet/outlets, that a low mass flow of gaseous combustion product is operable to continue from the time of muzzle exit for a considerable portion of projectile flight and to provide a substantial decrease in base drag with a concomitant increase in projectile range. The pressure in the combustion chamber during flight only slightly exceeds the base pressure in an amount of 0.01 to 0.5 bar.