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:
Feb. 18, 2020
Filed:
Sep. 28, 2016
Applicant:
Kabushiki Kaisha Riken, Tokyo, JP;
Inventor:
Kimiaki Hashimoto, Kumagaya, JP;
Assignee:
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 38/00 (2006.01); B22F 1/00 (2006.01); F01L 3/02 (2006.01); C22C 19/07 (2006.01); C22C 38/24 (2006.01); C22C 38/34 (2006.01); C22C 1/04 (2006.01); C22C 32/00 (2006.01); B22F 5/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/22 (2006.01);
U.S. Cl.
CPC ...
F01L 3/02 (2013.01); B22F 1/007 (2013.01); B22F 1/0011 (2013.01); B22F 5/008 (2013.01); C22C 1/04 (2013.01); C22C 1/0425 (2013.01); C22C 19/07 (2013.01); C22C 32/0021 (2013.01); C22C 32/0047 (2013.01); C22C 32/0078 (2013.01); C22C 38/00 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/34 (2013.01); B22F 2201/20 (2013.01); B22F 2301/10 (2013.01); B22F 2301/15 (2013.01); B22F 2301/35 (2013.01); B22F 2304/10 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); F01L 2103/01 (2013.01); F01L 2810/02 (2013.01); F01L 2820/01 (2013.01);
Abstract
To provide a press-fitting, sintered valve seat having excellent valve coolability enabling use in high-efficiency engines, as well as excellent deformation resistance and wear resistance, first and second hard particles differing in hardness are dispersed in a total amount of 25-70% by mass in a network-shaped Cu matrix, the second hard particles having hardness of 300-650 HV0.1, lower than that of the first hard particles, and 0.08-2.2% by mass of P is contained in the sintered valve seat.