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:
Aug. 23, 2005
Filed:
Jul. 21, 2003
Hartmut Wagner, Günterode, DE;
Heinz Günter Breuer, Duisberg, DE;
Hans Hülsewis, Duisberg, DE;
Berthold Baumann, Eschede, DE;
Hartmut Wagner, Günterode, DE;
Heinz Günter Breuer, Duisberg, DE;
Hans Hülsewis, Duisberg, DE;
Berthold Baumann, Eschede, DE;
Rheinmetall W&M GmbH, Unterluss, DE;
Abstract
An apparatus for the section-wise autofrettage of gun barrels () by a hydraulic pressure generated inside the barrel. The apparatus (″) comprises a mandrel-shaped insert (″) inserted into the barrel () from the breech opening. A first sealing device () is disposed at one end of the insert (″), and has a seal packet () disposed on a seal seat () of the insert (″). The seal seat () is limited at the front by a threaded sleeve () screwed onto the insert (″), and an annular intermediate part () adjoining the threaded sleeve () at the rear. The seal packet () includes at least one O-ring () held by a shoulder () of the mandrel-shaped insert (″), and a high-pressure seal () formed by two partial rings () that are connected to one another by a conical contact surface ().