Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7559995 | Method for heat treatment of metal workpieces as well as a heat-treated workpiece A process for heat treating metal workpieces contains with respect to an efficient process control the following successive operations following directly one after the other: a heating phase; an enrichment phase; a first cooling phase; a bonding phase; a second cool... | 07/14/2009 |
| 7442261 | Iron-base alloy containing chromium-tungsten carbide and a method of producing it In a method of producing an iron-based alloy containing chromium carbide, pieces of cemented carbide are added to an iron-based melt containing carbon, e.g. cast iron. Chromium, which regulates the solution of WC into the melt, is also added. The molten alloy is the... | 10/28/2008 |
| 7422643 | Rolling element and method of producing the same There is provided an inexpensive rolling element used under high interface pressure such as induction hardened gears, the rolling element being improved in the seizure resistance of its tooth flanks and having a temper hardness of HRC 50 or more at 300° C. To this ... | 09/09/2008 |
| 7416614 | Method of gas carburizing A method of gas carburizing is carried out at a carburizing temperature which is not higher than a peritectic point temperature at which δ iron and liquid phase are transformed into γ iron and not less than a eutectic point temperature at which liquid phase is tra... | 08/26/2008 |
| 7384488 | Method for producing gears and/or shaft components with superior bending fatigue strength and pitting fatigue life from conventional alloy steels A conventional aluminum killed alloy steel for case hardening of gear(s) and/or shaft components consisting of 0.10 to 0.30 weight % Carbon, 0.15 to 0.35 weight % Silicon, 0.8 to 1.5 weight % Chromium, 0.6 to 1.5 weight % Manganese, 0.017 to 0.040 weight % Aluminum,... | 06/10/2008 |
| 7270719 | Method for manufacturing surface hardened stainless steel with improved wear resistance and low static friction properties The invention relates to the use of PVD technique for the application of a low static friction and wear resistant coating consisting essentially of titanium nitride or a diamond-like carbon—DLC, with or without an addition of tungsten carbide, on a stainless steel... | 09/18/2007 |
| 7207933 | Carburized roller member made of high carbon chromium steel A roller member comprising high carbon chromium bearing steel having a carburization treatment. The bearing steel comprising a surface portion defined as a range between a surface of a rolling face of the roller member to a depth where a maximum shearing stress acts... | 04/24/2007 |
| 7208052 | Method for carburizing steel components A carburizing process for increasing the hardness of a case region of a steel component. In one form the application includes plating the outer surface of a stainless steel component with nickel prior to carburizing. One component includes a stainless steel object h... | 04/24/2007 |
| 7122086 | Rolling support device and method for manufacturing the same A rolling support device excellent in both of the characteristics of durability and corrosion resistance is provided. The inner ring (1) and the outer ring (2) comprises an austenitic stainless steel and has, on a raceway surface, a carburizing hardene... | 10/17/2006 |
| 7029540 | Method of gas carburizing In a first process of a method of gas carburizing, a steel treatment object in a carburizing atmosphere containing carburizing gas is heated to an initial set temperature which is not higher than a peritectic point at which δ iron and a liquid phase transform into ... | 04/18/2006 |
| 6982120 | Hardened steel components and process of treating the same The invention relates to components made of steel, more particularly outer joint parts and inner joint parts of constant velocity joints, and to a process of heat treating such components made of steel. The heat treatment operation includes the process stages of nit... | 01/03/2006 |
| 6964712 | Hardening protection compositions for partial carburization of metallic components Hardening protection compositions based on substances which form boron glass for partial carburization of metallic components, which contain magnesium-silicon compounds as an additive. These hardening protection compositions can be used very advantageously in proces... | 11/15/2005 |
| 6942739 | Reactive heat treatment to form pearlite from an iron containing article The present invention is directed to a process for producing pearlite from an iron containing article comprising the steps of, (a) heating an iron containing article comprising at least 50 wt % iron for a time and at a temperature sufficient to convert at least a po... | 09/13/2005 |
| 6869489 | Steel for high bearing pressure-resistant member, having high machinability, and high bearing pressure-resistant member using same steel A steel for a high bearing pressure-resistant member, having a high machinability. The steel is formed of a machine structural steel comprising carbon in an amount ranging from 0.15 to 0.25% by weight, silicon in an amount of not less than 0.4% by weight, nickel in ... | 03/22/2005 |
| 6858096 | Rolling element for a continuously variable transmission (CVT), a CVT using the rolling element and a method for producing the rolling element A rolling element for a continuously variable transmission, including a plurality of rolling members having rolling contact portions that come into rolling contact with each other via lubricating oil. At least one of the rolling contact portions includes an outer su... | 02/22/2005 |
| 6776854 | Process and apparatus for the partial thermochemical vacuum treatment of metallic workpieces In the partial thermochemical vacuum treatment of metallic workpieces (1), in particular in the carburization and case hardening of workpieces (1) of case-hardening steel in a carbon-containing atmosphere, surface regions (3, 4, 5, 6) to be trea... | 08/17/2004 |
| 6695930 | Process for case hardened dies in improving die life Steel alloys susceptible to case and core hardening comprise 0.05 to 0.24 wt % carbon; 15 to 28 wt % cobalt and 1.5 to 9.5 wt % in nickel, small percentages of one or more additives: chromium, molybdenum, and vanadium; and the balance iron. Carburized rol... | 02/24/2004 |
| 6552280 | Surface-hardened austenitic stainless steel precision weight and process of making same A precision weight (1) has greater permanence of mass due to a hardened surface layer that provides greater wear and scratch resistance as well as greater corrosion resistance. The hardened surface layer is a diffusion layer of increased carbon and/or nit... | 04/22/2003 |
| 6547888 | Modified low temperature case hardening processes An iron-containing workpiece is case hardened by low temperature carburization during which one or more process steps--including adjusting the carburization temperature, adjusting the concentration of carburization specie in the carburization gas and reac... | 04/15/2003 |
| 6461448 | Low temperature case hardening processes A method for case hardening a chromium bearing nickel or ferrous based alloy, for example stainless steel, article, the method including the steps of activating the surface of the article; and carburizing the activated surface at a temperature below that ... | 10/08/2002 |
| 6458220 | Case hardened steel blades for sports equipment and method of manufacture Steel alloys susceptible to case and core hardening comprise 0.05 to 0.24 weight percent carbon; 15 to 28 weight percent cobalt and 1.5 to 9.5 weight percent in nickel, small percentages of one or more additives: chromium, molybdenum, and vanadium; and th... | 10/01/2002 |
| 6328819 | Method and use of an apparatus for the thermal treatment, in particular nitriding treatment, of metal workpieces A method is provided for heat treatment of metal workpieces obtain a substantially uniform nitride layer, even in workpieces comprising high alloy iron articles. The following method steps are provided: a) heating the workpieces to a temperature between 400° ... | 12/11/2001 |
| 6306227 | Rolling bearing In a rolling bearing having a rolling bearing ring and a rolling element of at least 20 mm in diameter, at least one of the rolling bearing ring and the rolling element consists of carburized or carbonitrided steel containing at least 0.2 wt % and not mor... | 10/23/2001 |
| 6287393 | Process for producing carburizing atmospheres An improved process for producing an atmosphere suitable for carburizing steel components by adding a small amount of oxygen to a mixture of natural gas and carbon dioxide, pre-heating the mixture to the desired reaction temperature in the presence of an ... | 09/11/2001 |
| 6258179 | Carburized parts, method for producing same and carburizing system A carburizing method is described which is capable of dispersing cementite grains in the surface of steel uniformly and finely as not to affect fatigue strength and capable of fining the crystal grains of austenite. To prevent cementite precipitation duri... | 07/10/2001 |
| 6248186 | Ball-and-roller bearing and method of manufacturing the same A ball-and-roller bearing is disclosed having an inner ring, an outer ring arranged on the axis of the inner ring and rotating around the co-axis relative to the inner ring, and a rolling body interposed between the inner ring and the outer ring and rolli... | 06/19/2001 |
| 6238490 | Process for the treatment of austenitic stainless steel articles Austenitic stainless steel articles are treated to produce a hardened surface layer thereon by plasma heat-treating the articles at a temperature in the range of 300 to 600° C. and at a pressure in the range of 100 to 1500 Pa in a carbon-containing treat... | 05/29/2001 |
| 6187111 | Vacuum carburizing method An improved vacuum carburizing method is provided which is easy to handle or to maintenance and low equipment costs without using hydrogen gas or acetylenic gas. The improved vacuum carburizing method comprises a carburizing treatment of workpieces made f... | 02/13/2001 |
| 6179933 | Surface treatment of rolling element bearing steel Rolling-element bearing components made from high quality steel are subjected to ion nitriding in a plasma as a final step in the manufacturing process to produce a layer with a hardness around 800-1200 HV with a depth no more than 150 μm. By controlling... | 01/30/2001 |
| 6159306 | Carburizing device and method of using the same The present invention provides a new and improved apparatus and method of carburizing ferrous metal parts. In one embodiment of the invention the apparatus comprises a radiant heater tube within which a source of hydrocarbon fuel is fully combusted, and a... | 12/12/2000 |
| 6149734 | Method for heat treatment of steel A method for the heat treatment of steel, comprising carburization hardening said steel, to form carburized steel, followed by a second hardening, reduces the grain size of steel while precipitating carbonitrides inside the grains of steel, thereby increa... | 11/21/2000 |
| 6146471 | Spherical plain bearing and method of manufacturing thereof The improved spherical plain bearing of the present invention is formed using a unique method of manufacture which includes surface hardening of the outer ring and the inner ring wherein the outer ring includes a fracture zone having a reduced cross-secti... | 11/14/2000 |
| 6146472 | Method of making case-carburized steel components with improved core toughness A steel composition and method of processing have been developed that provide good grain coarsening resistance and optimum toughness after austenitizing at high temperatures for extended periods of time. The composition comprises, in % by weight, about: 0... | 11/14/2000 |
| 6110296 | Thin strip casting of carbon steels A substantially carbon free (e.g. 50-80 ppm carbon max.) iron base melt is strip cast to provide a cast strip having a low strength, high ductility, essentially ferrite matrix substantially free of hardening acicular ferrite, bainite and martensite phases... | 08/29/2000 |
| 6090225 | Process for manufacturing a carburized or carbonitrided steel component, and steel for the manufacture of this component Process for manufacturing a mechanical component made of steel, in which a blank of the steel component is manufactured and a high-temperature carburizing or carbonitriding treatment of at least part of the surface of the blank of the component is carried... | 07/18/2000 |
| 6051203 | Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures Monolithic metal oxide structures, and processes for making such structures, are disclosed. The structures are obtained by heating a metal-containing structure having a plurality of surfaces in close proximity to one another in an oxidative atmosphere at ... | 04/18/2000 |
| 5916383 | Method of shot peening a hardened metal product with shot having high hardness A method for shot peening a hard metal product that has a hardened surface. The method includes projecting shot on the hardened surface of the hard metal product. The ratio of the Vickers hardness of the shot to that of the hardened surface is 0.8-1.6, an... | 06/29/1999 |
| 5853502 | Carburizing steel and steel products manufactured making use of the carburizing steel A carburizing steel having the following chemical composition: C: 0.1 to 0.25%, Si: 0.2 to 0.4%, Mn: 0.3 to 0.9%, P: 0.02% or less, S: 0.001 to 0.15%, Cr: 0.5 to 0.9%, Mo: 0.15 to 1%, Al: 0.01 to 0.1%, B: 0.0005 to 0.009%, N: less than 0.006%, and the balance of Fe and ... | 12/29/1998 |
| 5841033 | Process for improving fatigue resistance of a component by tailoring compressive residual stress profile, and article A process for improving fatigue resistance of a case hardened component having a case thickness "t", subjected to one or more of rolling, sliding, abrasion, bending and pitting includes determining the magnitude of fatigue strength at surface and at a plu... | 11/24/1998 |
| 5827375 | Process for carburizing ferrous metal parts The present invention provides a new and improved method of carburizing ferrous metal parts. In one embodiment the invention comprises the steps of heating the process chamber of a furnace to a temperature in excess of about 1100° F., charging such parts... | 10/27/1998 |
