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:
Mar. 30, 1993
Filed:
Aug. 28, 1991
Applicant:
Inventors:
Klaus-Hagen Schreiber, Meine, DE;
Fred Thiele, Braunschweig, DE;
Assignee:
Volkswagen AG, Wolfsburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
29888061 ; 2988806 ; 29DI / ;
Abstract
To simplify the manufacture of a cylinder head having at least one port liner surrounding a compression change passage, the port liner, a valve seat ring and a lift valve guide are welded together to make a unitary gas-passage-forming member and the cylinder head is cast around the gas-passage-forming member.