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:
Apr. 07, 1998
Filed:
Mar. 28, 1996
Holger Schmidt, Wuppertal, DE;
Gerd Kruger, Wetter, DE;
Bleistahl Produktions- GmbH & Co. KG, Wetter/Ruhr, DE;
Abstract
In a method for mounting and finishing a valve seat ring in an operational position of a receiving bore at the entrance of a gas channel of the cylinder head of an internal combustion engine consisting of a light alloy, an annular body with a central opening is manufactured by powder pressing and sintering. A roller burnishing tool is positioned within the central of the annular body. The annular body is inserted into the receiving bore with the aid of the roller burnishing tool such that the annular body is positioned with play relative the inner wall of the receiving bore. The annular body is radially expanded by roller burnishing with the roller burnishing tool such that the annular body positive-lockingly engages the inner wall of the receiving bore and is compressed to a selected finish size of ready-to-use density.