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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 10584618 B1

PDFFull Text
Date of Patent:
Mar. 10, 2020

Filed:

Dec. 01, 2017

Sintered valve seat

Applicant:

Kabushiki Kaisha Riken, Tokyo, JP;

Inventor:

Kimiaki Hashimoto, Kumagaya, JP;

Assignee:

KABUSHIKI KAISHA RIKEN, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jacob M Amick

Int. Cl.
CPC ...
F01L 3/02 (2006.01); C22C 38/24 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01); C22C 38/04 (2006.01); C22C 38/02 (2006.01); C22C 27/04 (2006.01); B22F 1/00 (2006.01); B22F 5/10 (2006.01); C22C 19/07 (2006.01); F02F 1/24 (2006.01);
U.S. Cl.
CPC ...
F01L 3/02 (2013.01); B22F 1/0003 (2013.01); B22F 5/106 (2013.01); C22C 19/07 (2013.01); C22C 27/04 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/28 (2013.01); B22F 2301/10 (2013.01); B22F 2301/15 (2013.01); B22F 2301/20 (2013.01); B22F 2301/35 (2013.01); F01L 2101/00 (2013.01); F01L 2103/00 (2013.01); F02F 1/24 (2013.01);
Abstract

To provide a sintered valve seat having excellent valve coolability making it usable for high-efficiency engines, as well as excellent deformation resistance, wear resistance and detachment resistance, the valve seat is provided with a two-layer structure having a seat layer repeatedly abutting a valve face, and a support layer abutting bottom and inner peripheral surfaces of a valve-seat-press-fitting opening of a cylinder head; the seat layer containing at least one selected from Co-based hard particles and Fe-based hard particles in a matrix of Cu or its alloy; and the support layer containing at least one selected from Fe particles and Fe alloy particles in a matrix of Cu or its alloy.

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