Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Reexamination Certificate
2006-05-09
2006-05-09
Mai, Ngoclan T. (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
C075S243000, C419S028000, C419S029000
Reexamination Certificate
active
07041149
ABSTRACT:
A sintered sprocket has a high overall density and excellent contact pressure resistance. The sprocket is produced from a sintered alloy selected from the following alloys ((1) to (3)), is densified to have a relative density of 95% or higher in the surface layer of the gear teeth by forming by rolling, having a surface hardness of 700 HV or higher, and is useful for a crankshaft, a cam shaft, a balancer shaft, or a water pump shaft of an internal combustion engine:(1) an Fe—Mo—C based sintered alloy containing Mo at 1.0 to 2.0% by mass;(2) an Fe—Mo—Ni—C based sintered alloy containing Mo at more than 1.0 and not more than 2.0% by mass, and Ni at more than 1.0 and not more than 2.5% by mass, or(3) an Fe—Mo—Ni—Cu—C based sintered alloy containing Mo at 0.3 to 1.0% by mass, Ni at not less than 1.5 to less than 3.0% by mass, and Cu at 1.0 to 2.5% by mass.
REFERENCES:
patent: 2271759 (1942-02-01), Christman
patent: 3239910 (1966-03-01), White
patent: 3735619 (1973-05-01), Tersch
patent: 5613180 (1997-03-01), Kosco
patent: 5672014 (1997-09-01), Okita et al.
patent: 5954894 (1999-09-01), Tsushima
patent: 6338747 (2002-01-01), Kosco
patent: 6473964 (2002-11-01), Anderson et al.
patent: 2003/0228949 (2003-12-01), Okabe et al.
patent: 2001-295915 (2001-10-01), None
patent: 2002-129295 (2002-05-01), None
Fujiki Akira
Ishii Kei
Mabuchi Yutaka
Maekawa Yukihiro
Murata Takashi
Hitachi Powdered Metals Co. Ltd.
Mai Ngoclan T.
LandOfFree
Sintered sprocket for silent chain and production method... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sintered sprocket for silent chain and production method..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sintered sprocket for silent chain and production method... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3650614