Class 148/586 - Gear

Subclass of Class 148 - Metal treatment
Definition: Process wherein the metal undergoing treatment is a part,
No. of patents: 38
Last issue date: 09/09/2008

Number	Title	Issue Date
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
7364803	High density dual helical gear and method for manufacture thereof The present invention relates to a low cost technique for manufacturing dual helical gears, such as herringbone gears, from powder metals. The dual helical gears made by this technique are of high density (greater than 92% of theoretical density) and offer superior ...	04/29/2008
7134850	Fitted assembly bellows pump In a pump employing a bellows, individual members are formed from resins and pump components including a fitted assembly formed by fitting plural members with each other form a structure unit which is tightly inserted in an external cover and constrained on the oppo...	11/14/2006
7000444	Forging method and apparatus A method of producing a bevel gear, particularly a bevel ring gear, the bevel gear comprising mounting surfaces. The method comprising the steps of flashless warm forging a blank, preferably an annular blank, in a forging die to produce the bevel gear with precision...	02/21/2006
6602358	Outer race for constant velocity joint, having improved anti-flaking properties and shaft strength, and process for producing the same Disclosed are an outer race for a constant velocity joint, having improved anti-flaking properties and shaft strength, and a process for producing the same. The outer race for a constant velocity joint includes a cup and a serration and comprises by weigh...	08/05/2003
6488788	Flat plate member with a gear portion and a process for making the same A flat plate member with gear portion is formed to a predetermined shape by pressing a flat steel raw material having a composition comprising, by weight, 0.10-0.18% C, less than 0.03% Si, 0.60-1.50% Mn, less than 0.020% P, less than 0.013% S, 0.001-0.004...	12/03/2002
6401941	Rack for loading parts for heat treatment The rack is made essentially out of thermostructural composite material and comprises a baseplate (12), a partition (14) extending above the baseplate, and a plurality of support arms (20) fixed to the partition and extending substantially horizontally th...	06/11/2002
6330836	Steel for gear drive plate gear and method for producing the drive plate gear A steel for a gear which is formed on a drive plate gear includes; C: 0.32 to 0.38%, Si: 0.1% or less, Mn: 0.60 to 0.90%, P: 0.03% or less, and S: 0.035% or less....	12/18/2001
6315841	Induction hardened forged gear and process for preparing same Bevel gears having a carbon content of at least about 0.4% by weight, preferably 0.5% by weight are manufactured by a process which includes forging a steel blank having a carbon content of at least 0.4% by weight until a bevel gear precursor having essen...	11/13/2001
6264886	Sintered metallic alloy, method of manufacturing the sintered metallic alloy, and sintered alloy gear employing the sintered metallic alloy There is provided a sintered metallic alloy having toughness capable of supporting stress at a point by distributing structure portions having different values of rigidity approximately uniformly without separation of layers different in brashiness. A met...	07/24/2001
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
6129793	Face-gear forging method A face-gear forging die which can be used to near-net forge face gears is disclosed. The face-gear forging die is constructed from a blank, and is cut to specification using a wire electrical discharge machining (EDM) process. The wire electrical discharg...	10/10/2000
6129794	Method of manufacturing a gear wheel A method of manufacturing a gear wheel including a shaft and a tooth system. The method includes the steps of hardening and annealing the gear wheel, heating the gear wheel to an annealing temperature, spinning the gear wheel when the annealing temperatur...	10/10/2000
6026700	Tooth form parameters for ground teeth of gear spindle coupling and method of making the same A gearset for a gear spindle coupling or the like, and method for forming the same, comprising a sleeve gear and a hub gear which may be ground after surface hardening without the introduction of undesired structural weakening. The sleeve gear includes in...	02/22/2000
6019857	Carburized hardening process and carburized hardened power transmission members Power transmission member such as gears with high breaking strength of the edge portion (A) of the root and high spalling resistance of the tooth side (B) is obtained. The work such as gears, etc. is cooled after carburization by plasma carburizing, etc. ...	02/01/2000
5868878	Heat treatment by plasma electron heating and solid/gas jet cooling A workpiece is heated by first forming an ionized gas plasma around the workpiece. A positive potential is applied to the workpiece to accelerate electrons from the plasma into the workpiece. The workpiece is uniformly surface heated by the energy directe...	02/09/1999
5799398	Method for precision gear finishing by controlled deformation An apparatus and method are provided for the thermomechanical net shape finishing of precision gear tooth surfaces by controlled deformation into metastable austenitic condition. To this end, an arrangement of a fixed axis through-feed motion of workpiece...	09/01/1998
5785771	Method for manufacturing precision gears A method for manufacturing precision gears (10) including an initial step of providing a shaped workpiece (30S) defining a plurality of gear teeth (12) and, furthermore, defining a tooth space surface (68) defined by and between adjacent gear t...	07/28/1998
5690756	Method for producing cast iron gear A method for producing cast iron gears includes the steps of heating a blank composed of cast iron and having a teeth forming part to such a temperature that at least the teeth forming part is at least austenitized, and hot rolling the teeth forming part ...	11/25/1997
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
5656106	Apparatus and method for net shape finishing of gears An apparatus is disclosed for performing thermomechanical processing of gears in which precise control of the thermal, metallurgical and mechanical action during the forming process is maintained. The apparatus comprises an induction heating system which ...	08/12/1997
5562785	Method for manufacturing toothed gears A disc-shaped material is prepared by punching a high carbon steel plate or soft steel plate, and the disc-shaped material is fixed in position. An outer peripheral portion of the disc-shaped material is heated to a temperature of 400°-500° C. y means o...	10/08/1996
5527400	Method and apparatus for machining hardened parts apparatus for machining hardened parts A method and apparatus for machining a workpiece from a hardened unmachined part includes the use of non-rotating centers in a turning machine, on which the workpiece is mounted. The shape of the dead centers permits less force to be used in support of th...	06/18/1996
5516376	Method of, and apparatus for manufacturing a gear with a central through hole A hardened surface layer is formed in the region of inner and outer surfaces of a hollow material having a central through hole, then the hollow material is hot-forged into a hollow gear-like forged body by a forging die having a first die element with a ...	05/14/1996
5451275	Apparatus and method for precision gear finishing by controlled deformation An apparatus and method are provided for the thermomechanical net shape finishing of precision gear tooth surfaces by controlled deformation into metastable austenitic condition. To this end, an arrangement of a fixed axis through-feed motion of workpiece...	09/19/1995
5213636	Method and apparatus of quench hardening of gear teeth surfaces A method for induction heating and quench hardening of helical gears provides a hardness pattern uniformly distributed to a controlled depth across and between the teeth surfaces by means of axial scanning of the workpiece and uniform quenching. Uniform q...	05/25/1993
5082507	Austempered ductile iron gear and method of making it An austempered ductile iron differential gear and method of manufacture. The gear is cast to near net shape in a vertical injection, flaskless moulding machine using delayed inmould inoculation to ensure greater homogeneity of the alloy melt. The gear cas...	01/21/1992
4885831	Method for forming a contour hardened gear Initially, an uncut gear blank is softened by a heat treatment process to provide a relatively soft level of hardness throughout. Then, the softened gear blank is machined so as to form a plurality of teeth about the circumference thereof. The relatively ...	12/12/1989
4744836	Method for selectively heating a workpiece subjected to low temperature thermomechanical processing Process and apparatus are provided for selective heating a portion of a workpiece to achieve improved ausforming and isoforming processes when the workpiece is plastically deformed by mechanical working above the Ms temperature. The process and...	05/17/1988
4639279	Single frequency induction hardening process The teeth and roots of a gear are contour hardened by induction at a single work station with a single solid state power supply. The inductor or coil is full-faced and encircles the gear during the preheat and final heat steps of the process. The power su...	01/27/1987
4589935	Method of induction hardening of gear teeth Disclosed is a process and apparatus for induction hardening of the flank, root and tip surfaces of gear teeth so as to provide a surface-hardened layer along said surfaces. An electrically energizable inductor head carries out movement along the space be...	05/20/1986
4533400	Method and apparatus for laser hardening of steel An apparatus and method is disclosed whereby a high power laser beam is mechanically split into two substantially identical beams which are focused and directed onto opposite working surfaces of a workpiece to simultaneously harden both working surfaces, ...	08/06/1985
4373973	Method of manufacture of high performance gears A method for forming gear teeth of a high performance gear is accomplished by shaping the carburized gear tooth surface while the gear blank is held at a uniform temperature in the metastable austenitic condition above the start of the martensitic transfo...	02/15/1983
4343661	Method of making a low temperature bainite steel alloy gear A method of making a low temperature bainite steel alloy gear includes forming a toothed gear having preferably preselected weight percentages of carbon, manganese, silicon, molybdenum, boron and the balance substantially iron, heating the gear to assure ...	08/10/1982
4222793	High stress nodular iron gears and method of making same High stress, acicular bainitic, nodular iron gears having residual compressive stresses at the surface of the teeth's roots of at least about 40,000 psi and a subsurface residual compressive stress of about 10,000 psi at a depth between about 0.006 inch a...	09/16/1980
4030944	Production of annular products from centrifugally cast steel structures A technique for forming annular products such as bearing rings from a starting, centrifugally cast hollow ingot is described. The ingot is hot-sawed into intermediate annuli as it cools down from the casting temperature to below eutectoid temperature. The...	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
4026732	Method for induction hardening gear teeth A method and apparatus for obtaining full tooth width induction hardening of gear teeth. The method comprises attaching gear teeth shaped non-magnetic material templates to the opposite sides of the gears in close proximity to but spaced from the sides of...	05/31/1977

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Class 148/586 - Gear