Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7875135 | High pressure turbine airfoil recovery device and method of heat treatment Provided is a method for heat treating a precipitation-hardened article having a thick section and a thin section so that the thin section can be solution annealed while the metallurgical structure of the thick section is substantially unaffected by the solution-ann... | 01/25/2011 |
| 7220327 | Kick-down drum material and method of manufacturing the same Disclosed is a material of a kick-down drum comprising fine ferrite and microdispersion spheroidized cementite for an automobile also disclosed is a method for manufacturing the kick-down drum material. The kick-down drum of this invention can greatly improve harden... | 05/22/2007 |
| 7096075 | Apparatus, method and program for physical state controller For determination as to whether there is a possibility that temperature control satisfying conditions according to an upper limit LH_i and a lower limit LL_i of the annealing control temperatures of annealing object steel sections i will be realized under restrictio... | 08/22/2006 |
| 6918224 | Heat treatment strategically strengthened door beam A method of forming a vehicle component, particularly an elongated impact beam, having an open section structure, in a manner to provide predetermined strategically strengthened portions, comprising the steps of cold forming unhardened steel into a workpiece having ... | 07/19/2005 |
| 6174389 | Fixture and method for selectively quenching a predetermined area of a workpiece An apparatus and method for excluding specific areas of a workpiece from quenching during a heat treat process. A workpiece, having preselected areas to be quenched, is positioned in a manner so that quench sprays are aimed toward the surface to be quench... | 01/16/2001 |
| 5972134 | Manufacture of a metallic molded structural part The invention is directed to a process for the manufacture of a metallic molded structural part (1) for motor vehicle components such as door impact girders or bumpers with areas (2) with a higher ductility in relation to the rest of the structural compon... | 10/26/1999 |
| 5738739 | Method for producing low carbon equivalent rolled steel shapes by controlled rolling A method for producing a steel section by a rolling process including a rough rolling step, an intermediate rolling step and a finishing rolling step. The intermediate rolling step comprises water-cooling the flange portion of the rough-rolled steel secti... | 04/14/1998 |
| 5451276 | Process for producing a ski edge A process is disclosed for producing a ski edge made of quenched and subsequently tempered steel having a head (2) that comprises the running surface and a flank (4) that projects into the body of the ski. The profiled edge (1) is at first rolled, then qu... | 09/19/1995 |
| 5334269 | Interrupted normalization heat treatment process An interrupted normalize heat treatment process for ferritic alloy steel that includes the steps of rapidly cooling at least the outer surfaces of the steel from a temperature above the Ac temperature to a temperature below the Ar, temperature and during ... | 08/02/1994 |
| 5191778 | Process for producing thin-webbed H-beam steel A thin-webbed H-beam steel having a web thinner that flanges is produced by forcibly water cooling the outer surface of the flanges during an intermediate hot rolling prior to a final hot rolling by cooling to less than 700° C., interrupting the cooling ... | 03/09/1993 |
| 5188681 | Process for manufacturing thin strip or sheet of Cr-Ni-base stainless steel having excellent surface quality and material quality A process for manufacturing a thin sheet of a Cr-Ni-base stainless steel having an excellent surface quality and material quality, which comprises casting a cast strip having a thickness of 6 mm or less from a Cr-Ni-base stainless steel including 18% Cr-8... | 02/23/1993 |
| 5174836 | Interrupted normalization heat treatment process An interrupted normalization heat treatment process for ferritic alloy steel that includes the steps of rapidly cooling at least the outer surfaces of the steel from a temperature above the Ac3, temperature to a temperature below the Ar1 | 12/29/1992 |
| 4732624 | Method for hardening camshafts A camshaft heat treating apparatus and method for processing a plurality of apparatus and method designs, which camshaft identifies and thereafter automatically inductively heats, quenches and inspects the camshaft in accordance with its design parameters... | 03/22/1988 |
| 4531987 | Method for inductively heat treating workpiece bore walls A method and apparatus of quench hardening to a desired depth the full axial extent of the wall surface, or selected portions of the wall surface, of an axially extending bore in an elongated workpiece wherein the bore has a selected uniform cross-section... | 07/30/1985 |
| 4431466 | Method for making armor plate A method for making armor plate which comprises commencing with a homogeneous metal plate that has been hardened. Then moving the plate into a liquid bath while applying heat to one surface of the plate. The plate is progressively moved into the bath at a... | 02/14/1984 |
| 4401485 | Method for inductively heating thin-walled elongated workpieces A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, ... | 08/30/1983 |
| 4375997 | Method of inductively heat treating a thin-walled workpiece to control distortion In a preferred embodiment a surface layer of a thin-walled, hollow, cylindrical steel body is hardened while controlling thermal distortion by first heating with an inductor and quenching in one direction over the surface and then repeating the process in... | 03/08/1983 |
| 4257831 | Process for the continuous hardening of pump casings The invention relates to an economic process and apparatus for the continuous hardening of pump casings by means of flame hardening, with or without modifications to the core characteristics. As a result the life of the thus treated pump casing is conside... | 03/24/1981 |
| 4030951 | Method of hardening saw teeth This invention provides a method for hardening sawteeth which comprises contacting running water with the top ends of sawteeth in air, blowing flames to the top ends of the sawteeth in this state to thereby blow off the running water at parts enveloping t... | 06/21/1977 |
| 4029526 | Method of flame hardening gears Flame hardening method and apparatus for tempering gear teeth and the like which comprises quench means for rapidly cooling selected ones of the gear teeth to a temperature which avoids the formation of decomposition products, and a heat source spaced fro... | 06/14/1977 |
| 4016015 | Rolled steel rod or bar Steel rod or bar at the exit of the finishing stand of a hot rolling mill is superficially quenched, so that the surface layer of the rod or bar is given a bainitic or martensitic structure. Immediately after quenching, the core of the rod or bar is at ab... | 04/05/1977 |
