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:
Dec. 15, 2015
Filed:
Dec. 14, 2010
Applicants:
Hiroki Fujitsuka, Matsudo, JP;
Hideaki Kawata, Matsudo, JP;
Inventors:
Hiroki Fujitsuka, Matsudo, JP;
Hideaki Kawata, Matsudo, JP;
Assignee:
HITACHI POWDERED METALS CO., LTD., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 33/02 (2006.01); F01L 3/08 (2006.01); C22C 1/10 (2006.01); C22C 32/00 (2006.01); F01L 1/16 (2006.01);
U.S. Cl.
CPC ...
F01L 3/08 (2013.01); C22C 1/1084 (2013.01); C22C 32/0047 (2013.01); C22C 33/0228 (2013.01); C22C 33/0242 (2013.01); C22C 33/0257 (2013.01); F01L 1/16 (2013.01); F01L 2101/00 (2013.01);
Abstract
A sintered valve guide exhibits a metallic structure having a mixed structure and a hard phase in which hard particles are dispersed in an alloy matrix. The mixed structure consists of pearlite, an Fe—P—C ternary eutectic phase, a ferrite phase, a copper phase, and pores, and the mixed structure consists of, by mass %, 0.075 to 0.525% of P, 3.0 to 10.0% of Cu, 1.0 to 3.0% of C, and the balance of Fe and inevitable impurities. The hard phase is dispersed at 2 to 15 mass % in the mixed structure.