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Class Information
Number: 148/589
Name: Metal treatment > Process of modifying or maintaining internal physical structure (i.e., microstructure) or chemical properties of metal, process of reactive coating of metal and process of chemical-heat removing (e.g., flame-cutting, etc.) or burning of metal > Heating or cooling of solid metal > Iron(fe) or iron base alloy > Ring
Description: Process wherein the metal undergoing treatment is in the shape of an annular band of limited length (i.e., ring).

Patents under this class:

Patent Number Title Of Patent Date Issued
8377238 Method for the thermomechanical treatment of seamless rings produced on radial-axial ring rolling machines Feb. 19, 2013
8177928 Method of restrained-quenching of annular member May. 15, 2012
7416621 Laser rounding and flattening of cylindrical parts Aug. 26, 2008
7204005 Manufacturing method of endless metal belt and manufacturing apparatus of endless metal belt Apr. 17, 2007
7150800 Production method of belt for stainless steel continuously variable transmission belt Dec. 19, 2006
7090729 Outer ring member for constant velocity joint and method of manufacturing the member Aug. 15, 2006
6936119 Method for producing metallic, non-rotationally symmetrical rings with a constant wall thickness over their circumference Aug. 30, 2005
6837946 Method for the production of a part of a rolling bearing Jan. 4, 2005
6585834 Method for performing a heat treatment of metallic rings, and bearing ring thus obtained Jul. 1, 2003
6550122 Method of manufacturing laminated ring Apr. 22, 2003
6517644 Rolling bearing and method manufacturing the same Feb. 11, 2003
6475309 Rolling bearing steel having a surface with a lower bainitic structure and a method for the production thereof Nov. 5, 2002
6379473 Method of manufacturing laminated ring using molten salt composition Apr. 30, 2002
6331219 Retarded cooling system with granular insulation material Dec. 18, 2001
6264768 Method for strengthening of rolling element bearings by thermal-mechanical net shape finish forming technique Jul. 24, 2001
6193820 Method for the thermal treatment of bushings, particularly for tracked vehicles and the like Feb. 27, 2001
6093268 Corrective tempering method for rolling elements Jul. 25, 2000
6063218 Bearing manufacturing method May. 16, 2000
6048418 Ring forming apparatus and heat treating process Apr. 11, 2000
5672217 Method for producing machine elements of steel Sep. 30, 1997
5667603 Hardening process and apparatus for holed flat parts Sep. 16, 1997
5660650 Method and apparatus for correcting the hardening deformation of annular elements Aug. 26, 1997
5304262 Two-piece oil ring for use in internal combustion engine, steel wire of modified cross-section for use as material of the oil ring and method of producing the steel wire Apr. 19, 1994
5290374 Method of making a pin type bearing retainer Mar. 1, 1994
4973368 Method of manufacturing steel elements designed to withstand high stress, such as roller bearing elements Nov. 27, 1990
4580353 Apparatus and method for air cooling hot rolled steel rod Apr. 8, 1986
4527408 Method and Apparatus for cooling and handling hot rolled steel rod in direct sequence with a high speed rolling operation Jul. 9, 1985
4430130 Basketball goal Feb. 7, 1984
4364159 Method for manufacturing a forged piston with reinforced ring groove Dec. 21, 1982
4184242 Beveled retaining ring and method for constructing the same Jan. 22, 1980
4085490 Method of making a rolled metal piston ring Apr. 25, 1978
4001053 Method of removing residual stress of a work formed of metal or ceramic and a sealing apparatus Jan. 4, 1977

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