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:
Oct. 18, 1983
Filed:
Sep. 02, 1980
Applicant:
Inventor:
Pierre van der Wielen, Liege, BE;
Assignee:
Fabrique Nationale Herstal, Herstal, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F41C / ;
U.S. Cl.
CPC ...
89 16 ; 428667 ;
Abstract
This barrel is characterized in that it comprises three layers superimposed without any break in continuity of surface contact between layers, namely: an internal layer of a refractory material; a core layer of a material the mechanical strength of which is higher than about 250 MPa at 900.degree. and an external layer of an alloyed steel. The invention relates also to a process for the manufacture of such barrel.