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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.:

US 9382820 B1

PDFFull Text
Date of Patent:
Jul. 05, 2016

Filed:

Jun. 10, 2014

Method for producing a built hollow valve

Applicant:

Mahle International Gmbh, Stuttgart, DE;

Inventors:

Peter Kroos, Rutesheim, DE;

Christoph Luven, Stuttgart, DE;

Alexander Mueller, Wildberg, DE;

Alexander Puck, Esslingen, DE;

Assignee:

Mahle International GmbH, , DE;

Attorney:

Fishman Stewart PLLC

Primary Examiner:

Ryan J Walters

Int. Cl.
CPC ...
B23K 26/28 (2014.01); F01L 3/20 (2006.01); B23P 15/00 (2006.01); B23K 15/00 (2006.01); B23K 26/08 (2014.01); B23K 31/12 (2006.01); F01L 3/12 (2006.01);
U.S. Cl.
CPC ...
F01L 3/20 (2013.01); B23K 15/0053 (2013.01); B23K 15/0093 (2013.01); B23K 26/08 (2013.01); B23K 26/282 (2015.10); B23K 26/285 (2013.01); B23K 31/125 (2013.01); B23P 15/002 (2013.01); F01L 3/12 (2013.01); B23K 2201/003 (2013.01); B23K 2201/006 (2013.01); Y10T 29/49307 (2015.01); Y10T 29/49774 (2015.01);
Abstract

A method for producing a hollow valve of an internal combustion engine may include providing a hollow valve stem, a valve cone, and a valve bottom; pushing the valve cone over the valve stem via a press fit, wherein the valve cone includes an outer surface transitioning to the valve stem to define a testing surface; and welding the valve cone to the valve stem via at least one of a laser beam and an electron beam, wherein the welding occurs such that no melting of the outer surface in the region of the testing surface of the valve cone occurs.

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