Class 148/589 - Ring

Subclass of Class 148 - Metal treatment
Definition: Process wherein the metal undergoing treatment is in the
No. of patents: 35
Last issue date: 08/26/2008

Number	Title	Issue Date
7416621	Laser rounding and flattening of cylindrical parts A method is disclosed for rounding and/or flattening an annular part that is out of round and/or not flat due to non-uniform internal stresses. The part is first checked for out of round and/or out of flat conditions. Out of round parts are then rounded by introduci...	08/26/2008
7204005	Manufacturing method of endless metal belt and manufacturing apparatus of endless metal belt A manufacturing method of an endless metal belt having metal rings built up and differing in circumference, includes the following steps of: a first circumference correction step of expanding each of the metal rings; and a second circumference correction step of exp...	04/17/2007
7169239	Solid expandable tubular members formed from very low carbon steel and method A very low carbon steel alloy is provided for use in manufacturing tubular members such as oil country tubular goods. The tubular members may be radially expanded from at least twenty percent to forty percent. Sections or joints of casing formed from the steel alloy...	01/30/2007
7150800	Production method of belt for stainless steel continuously variable transmission belt When a metastable austenitic stainless steel strip with a value Md(N), which is calculated from a composition, of 20–100 is ring-rolled to a steel belt, the relationship of −0.3913T+0.5650Md(N)+60.46ε≧65.87 is established among a material temperature T, an eq...	12/19/2006
7117594	Oil-scraper piston ring and a method for producing an oil-scraper piston ring A piston oil control ring with at least one tapered running rail, provided with a wear-resistant coating, characterized in that a radial elevation with predetermined radial height and width, which is provided with the wear-resistant coating, is provided in the regio...	10/10/2006
7114254	Metal plate gasket A metal gasket assembly has a gasket plate and an annular grommet. The gasket plate is formed with an opening having opposing surfaces adjacent the opening to define a predetermined fixed thickness of a plate. The annular grommet has an elastically deformable U-shap...	10/03/2006
7090729	Outer ring member for constant velocity joint and method of manufacturing the member An outer ring member for a constant velocity joint is manufactured. An intermediate preformed product having a cup section with an incomplete shape is formed by pressing a large diameter section without applying a low temperature annealing treatment and a lubricatin...	08/15/2006
7052019	Piston ring and method of manufacturing the same A manufacturing method of a piston ring is developed, wherein the method provides a countermeasure for wear of butt ends of the ion plating film coated piston ring and a countermeasure for breakage of the piston ring and the piston ring manufactured at a low cost. A...	05/30/2006
6936119	Method for producing metallic, non-rotationally symmetrical rings with a constant wall thickness over their circumference The invention is directed to a method and a device for producing metal, non-rotationally symmetric rings with a constant wall thickness along their circumference, particularly cam rings, starting from a hot-rolled pipe from which individual portions are severed, mec...	08/30/2005
6901782	Method and apparatus for forming a modified a cross-section wire material A modified cross-section wire material is formed into piston rings such as oil-control rings for use in an engine. An apparatus of the present invention for forming the modified cross-section wire material has a forming unit (15) comprising in combination a n...	06/07/2005
6837946	Method for the production of a part of a rolling bearing Method for the production of a part of a rolling bearing, such as a ring for a ball bearing. The starting material used is a grade of steel containing 0.90 1.00% C; at most 0.15% Si; 0.25-0.45% Mn; at most 0.0015% P; at most 0.010% S; 1.30-1.50% Cr; at most 0.15% Ni...	01/04/2005
6585834	Method for performing a heat treatment of metallic rings, and bearing ring thus obtained A method of performing a heat treatment on steel rings, in particular for bearings, whereby the outer surface and inner surface of a preheated ring are exposed to different flows of a cooling medium such that the regions of the ring adjacent those surface...	07/01/2003
6550122	Method of manufacturing laminated ring A cylindrical drum is prepared by welding opposite ends of a thin sheet of maraging steel. A first solution treatment is effected on the cylindrical drum, and then the cylindrical drum is severed into a plurality of rings each having a predetermined width...	04/22/2003
6517644	Rolling bearing and method manufacturing the same An outer ring 2 as a stationary ring is fabricated with a steel material having the composition as shown under. The steel material contains, as alloying elements, C 0.80 to 1.10 wt %, Si 0.20 to 0.50 wt %, Mn 0.2 to 1.0 wt %. It also contains any two kind...	02/11/2003
6475309	Rolling bearing steel having a surface with a lower bainitic structure and a method for the production thereof A method for producing a rolling bearing component, in which, before ustenizing, the steel is subjected to cold deformation and quenching is such that the bainitic structure is obtained; and a rolling bearing component produced by the method, such as a ro...	11/05/2002
6379473	Method of manufacturing laminated ring using molten salt composition A laminated ring for use as a belt in transmitting power in a continuously variable transmission is produced by welding opposite ends of a sheet of maraging steel to produce a plurality of rings, and rolling said rings to a predetermined length. The rings...	04/30/2002
6331219	Retarded cooling system with granular insulation material A system for cooling a hot rolled steel product at a retarded cooling rate comprises a laying head for forming the product into a continuous series of rings. A conveyor receives the rings from the laying head at a receiving station and transports the ring...	12/18/2001
6264768	Method for strengthening of rolling element bearings by thermal-mechanical net shape finish forming technique A method and apparatus disclosed for cost-effective net shape precision ausform finishing the engagement surfaces of ball and roller bearings, for enhancing the surface strength and durability of bearing inner and outer races. The method consists of induc...	07/24/2001
6193820	Method for the thermal treatment of bushings, particularly for tracked vehicles and the like A method for the thermal treatment of bushings, particularly for tracked vehicles and the like, which provides for a first step, during which external quench hardening of the bushing is performed by heating through to approximately 7/10-10/10 of the thick...	02/27/2001
6093268	Corrective tempering method for rolling elements In a corrective tempering method and apparatus for a rolling element in which the thermal deformation of the rolling element is corrected within an extremely short time by utilizing plasticity exhibited during a metallic structure transforming process bro...	07/25/2000
6063218	Bearing manufacturing method In a method of manufacturing a bearing, a high-frequency hardened steel essentially containing the following elements in the following percentage by weight is employed as the material of at least one of the outer and inner races of the bearing which is dr...	05/16/2000
6048418	Ring forming apparatus and heat treating process An improved method for heat treating and forming Belleville washers, springs, clutch plates and the like by initially stamping or otherwise forming a flat ring, heating the ring to an elevated temperature of approximately 1700° F., placing the hot ring w...	04/11/2000
5672217	Method for producing machine elements of steel In a method for producing machine elements of steel having a carbon content of 0.3 to 1.1%, blanks are heated to austenitizing temperature and austenitized, quenched for the formation of martensite, heated from room temperature to a maximum tempering temp...	09/30/1997
5667603	Hardening process and apparatus for holed flat parts A process for hardening a plurality of holed flat parts. The holed flat parts are heated by inserting a cantilever hanger into the holes of the holed flat parts to support them in vertical positions within a furnace. The holed flat parts are then removed ...	09/16/1997
5660650	Method and apparatus for correcting the hardening deformation of annular elements In a method and an apparatus for correcting a hardening deformation of an annular element made out of steel, during the cooling stage of hardening, the annular element which still has an austenitic structure is subjected to working on either the outside o...	08/26/1997
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 A two-piece oil ring, for use in an internal combustion engine, with the oil ring being made from a martensitic stainless steel material having high consisting essentially of more than 0.8 wt % but less than 0.95 wt % of C, not more than 1.0 wt % of Si, n...	04/19/1994
5290374	Method of making a pin type bearing retainer A pin type retainer for roller bearings is stamped in one piece from flat metal stock. The flat metal is first drawn into a cup shape having a broad flange around an open first end and a closed second end. The closed end provides solid support and alignme...	03/01/1994
4973368	Method of manufacturing steel elements designed to withstand high stress, such as roller bearing elements Steel elements designed to withstand high stress, such as roller bearing elements, are produced by using a steel which has substantially eutectoid composition, a such a steel billet being plasticly formed, without prior soft-annealing, at a temperature ju...	11/27/1990
4580353	Apparatus and method for air cooling hot rolled steel rod A conveyor has successive mutually spaced driven rollers in which hot rolled steel rod is transported in the form of overlapping offset rings. The rings are rapidly air cooled by first nozzles which direct first jets of cooling air upwardly to impinge aga...	04/08/1986
4527408	Method and Apparatus for cooling and handling hot rolled steel rod in direct sequence with a high speed rolling operation A method and apparatus for quenching steel rod in a high speed rolling mill is provided wherein a liquid coolant is preliminarily applied to the rod prior to its exiting from the mill finishing train in order to increase the column strength of the exiting...	07/09/1985
4430130	Basketball goal This invention is a method of producing an improved basketball goal rim including forming a rim from standard sized diameter steel, heat treating the rim to stress relief, harden and temper the same, and allowing said rim to cool. The rim is constructed f...	02/07/1984
4364159	Method for manufacturing a forged piston with reinforced ring groove The method effects a tight fit of a ferrous ring reinforcement at the head end of an aluminum alloy piston which tight fit remains during use of the piston. The procedural steps of the preferred method include: providing an aluminum alloy piston slug with...	12/21/1982
4184242	Beveled retaining ring and method for constructing the same A split beveled retaining ring and method for constructing the same is characterized by a beveled groove seating flange being formed by bending the radially inner or outer edge portion of a split ring body at an angle to the plane of the ring body. A grin...	01/22/1980
4085490	Method of making a rolled metal piston ring A rolled steel oil control piston ring for internal combustion engines is of generally U-shaped cross section with a pair of opposed rigid sidewalls projecting inwardly of the ring from a central peripheral wall thereof. A pair of flat-faced solid scraper...	04/25/1978
4001053	Method of removing residual stress of a work formed of metal or ceramic and a sealing apparatus A method of removing residual stress of a work formed of metal or ceramic includes basically two separate treatments, a vibration treatment called percussion treatment and a heating treatment....	01/04/1977

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Class 148/589 - Ring