logo

For the Inventor, By the Inventor

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 9988951 B1

PDFFull Text
Date of Patent:
Jun. 05, 2018

Filed:

Dec. 16, 2014

Double/triple-layer valve guide

Applicant:

Bleistahl-produktions Gmbh & CO KG, Wetter/Ruhr, DE;

Inventors:

Ingwar Hunsche, Bochum, DE;

Christian Blecking, Witten, DE;

Ekkehard Kohler, Wetter/Ruhr, DE;

Dirk Emde, Ennepetal, DE;

Assignee:

Bleistahl-Produktions GmbH & Co KG, Wetter/Ruhr, DE;

Attorney:

Berliner & Associates

Primary Examiner:

Jacob Amick

Int. Cl.
CPC ...
F01L 3/08 (2006.01); B22F 5/10 (2006.01); F01L 3/02 (2006.01); B22F 3/11 (2006.01); B22F 3/26 (2006.01); B22F 7/06 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); B22F 3/03 (2006.01); B23K 20/12 (2006.01); C22C 38/04 (2006.01); C22C 38/20 (2006.01); C22C 38/60 (2006.01);
U.S. Cl.
CPC ...
F01L 3/08 (2013.01); B22F 3/03 (2013.01); B22F 3/11 (2013.01); B22F 3/26 (2013.01); B22F 5/10 (2013.01); B22F 5/106 (2013.01); B22F 7/062 (2013.01); B23K 20/129 (2013.01); C22C 33/0278 (2013.01); C22C 38/00 (2013.01); C22C 38/008 (2013.01); C22C 38/04 (2013.01); C22C 38/20 (2013.01); C22C 38/60 (2013.01); F01L 3/02 (2013.01); B22F 2005/103 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01);
Abstract

The invention relates to a valve guide manufactured by a powder-metallurgical process for combustion engines, said guide comprising a central section, a cam-side end piece, and a duct-side end piece, wherein the central section consists of a first material and the duct-side end piece of a second material, with the second material having a hardness in excess of 70 HRB and the first material having a hardness that is by at least 10 HRB lower than that of the second material.

Find Patent Forward Citations

Hunsche, Ingwar. (2018). Double/triple-layer valve guide (U.S. Patent No. 9988951). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9988951

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…