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| Number | Title | Issue Date |
| 8051566 | Method for manufacturing rigid internal gear of wave gear device A method for manufacturing a rigid internal gear of a wave gear device in which an internally toothed portion formed with internal teeth and a gear main body portion are joined integrally, the method including preforming an internal teeth-forming ring or disc for fo... | 11/08/2011 |
| 7905018 | Production method for sintered gear A sintered gear comprises: plural tooth portion having a tooth flank and a tooth bottom land; a high density area formed over entire surface of the tooth portion, the high density area having a density of 7.6 Mg/m3 or more and formed with a depth of 1 mm ... | 03/15/2011 |
| 7761995 | Gear wheel with a multiple helical toothing, pressed in one part, and a method and device for manufacturing the same A gear wheel includes multiple helical toothings, each having a different helical angle. A pressing method for molding a gear wheel involves introducing a compactable material into a chamber of a pressing tool, compacting the material, exposing the helical toothings... | 07/27/2010 |
| 7748118 | Method for manufacturing rigid internal gear of wave gear device The present invention provides a method for manufacturing a rigid internal gear for a wave gear device comprising an internally toothed portion and a gear main body portion comprised of different materials. In this method, a gear main body ring for forming a gear ma... | 07/06/2010 |
| 7739793 | Method of manufacturing rack guide base body in rack-and-pinion type steering apparatus and rack guide A method of manufacturing a rack guide base body wherein a cavity (40) is formed which has a pair of semicylindrical convex surfaces (44a and 44b) and a pair of flat surfaces (45) each located between the semicylindrical con... | 06/22/2010 |
| 7634857 | Steel plate sprocket and method of producing same A sprocket is formed by fine-blanking a steel plate using a die having a cutting edge shaped to produce rounded edges on the back sides of the sprocket tooth heads, and protrusions on the front sides. Thereafter the edges of the front sides of the sprocket tooth hea... | 12/22/2009 |
| 7350391 | Method for manufacturing clutch housing A method for manufacturing a clutch housing comprises: a first step of forming a work into a pre-product having a shaft portion and an outer drum portion enclosing the shaft portion integrally with the shaft portion; a second step of subjecting the pre-product to pr... | 04/01/2008 |
| 7347076 | Forging method and apparatus for forming helical gear Disclosed herein are a helical gear forging apparatus wherein a forming introduction portion thereof, used to form gear teeth of the helical gear, is variable in shape on the basis of the desired helix angle of the gear-teeth so as to constantly keep a predetermined... | 03/25/2008 |
| 7337647 | Gear and method and device for manufacturing the gear A method for manufacturing a gear, wherein the gear is formed on a forging process by a die having an inner peripheral surface. A plurality of top surfaces corresponding to a bottom surface of the gear and both projected side surfaces corresponding to tooth surfaces... | 03/04/2008 |
| 7260970 | Hot forge forming facility A hot forge forming facility includes at least a material supply device, a heating device, a guiding device and a punching device. The material supply device carries a continuous supply of metal material in rolls. The heating device heats and softens the metal mater... | 08/28/2007 |
| RE39647 | Disk for toroidal type continuously variable transmission The disk has a traction surface having a concave-arc-shaped cross section which is interposed between a small diameter end portion and a large diameter end portion. In the central portion of the end face of the disk on the small diameter end portion side, there is f... | 05/22/2007 |
| 7207231 | Rack gear and method of making same A rack (20) for a rack and pinion steering system (10) includes a fully dense powder metal rack tooth section (50) joined, by sintering, to a hollow rack tube (30). The rack tooth section (50) is formed by pressing powder metal ( | 04/24/2007 |
| 7207110 | Differential housing with integrated ring gear A method is disclosed for making a differential housing having a ring gear integrally formed therein. The method includes the steps of forging a conical frustum from a steel rod; deforming the frustum between upper and lower die halves of a tool to produce a differe... | 04/24/2007 |
| 7178375 | Apparatus and method for stamping and deburring clutch discs Stamped and deburred clutch discs (20a, 20b) are provided by progressive stamping apparatus (46) whose method of use performs a two step stamping of the clutch disc blank and a third deburring stamping step that removes burrs on op... | 02/20/2007 |
| 7168281 | Method for producing an annular element comprising an inner toothing, especially a sliding sleeve, and device for carrying out the method A method for producing an annular element having an inner toothing, especially a sliding sleeve. An outlet ring element can be arranged in an extrusion device which includes an annular matrix element with an inner bore hole, a sleeve stamping device which is arrange... | 01/30/2007 |
| 7163754 | Sprocket wheel having a metallurgically bonded coating and method for producing same A sprocket has a base steel member including an outer toothed profile surface, at least a portion of the outer toothed profile surface having a wear and corrosion resistant coating disposed thereon; the coating comprising an alloy, the alloy comprising at least 60 w... | 01/16/2007 |
| 7155824 | Method of manufacturing an automotive differential having an input pinion A method for fabricating an input pinion for an automotive differential that includes: providing a shaft; forging a pinion with a plurality of teeth such that each tooth is formed to at least a near-net size, forming a hole in the pinion, pressing an end of the shaf... | 01/02/2007 |
| 7140269 | Gear wheel with a multiple helical toothing, pressed in one part, and a method and device for manufacturing the same A gear wheel includes multiple helical toothings, each having a different helical angle. A pressing method for molding a gear wheel involves introducing a compactable material into a chamber of a pressing tool, compacting the material, exposing the helical toothings... | 11/28/2006 |
| 7117598 | Net-shaped gear and manufacturing method for forming net-shaped gear employing insert and preform A differential assembly for a motor vehicle includes a plurality of pinion gears in meshing engagement with a plurality of side gears. At least one of the pinion gears and side gears is formed from a tubular insert and a tubular preform forged together in a forging ... | 10/10/2006 |
| 7111395 | Method for densifying teeth of a gear wheel A method and an apparatus are described for producing a gear wheel from a powder metal blank (1) which is sintered and pressed with an overmeasure in the flank and root region of the teeth and which in the region of the overmeasure is densified under plastic ... | 09/26/2006 |
| 7093513 | Differential side gear and the production method thereof A one piece extruded differential side gear comprising internal splines which are used to connect to a drive shaft. The differential side gear includes outer circular gear teeth and defines a rectilinear blind hole in which an end portion of the drive shaft is recei... | 08/22/2006 |
| 7080539 | Forged knurled socket housing and method of manufacture A method for manufacturing a cartridge-type housing for a ball and socket joint in a vehicular suspension system comprises the steps of inserting a housing blank into a forging tool die, expanding the housing blank within the forging tool die using a forging tool pu... | 07/25/2006 |
| 7069764 | Method for manufacturing a hollow rack shaft A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press formed into a gutter-like shape. The first die set used at this step is provided with slan... | 07/04/2006 |
| 7036349 | Scallop output shaft tools A die for forming a work-piece having a complex geometry includes a die insert having an interior surface that defines a first portion of the complex geometry and a retainer ring that selectively engages the die insert. The retainer ring includes a circumferential i... | 05/02/2006 |
| 7036227 | Process for making ratchet wheels A process for manufacturing ratchet wheels including the steps of: forming a cylindrical forging billet by hot or cold forging, the forging billet having a thru hole of inter-communicating recesses which are pre-formed in a forging die; providing a broach having tee... | 05/02/2006 |
| 7028403 | Method of manufacturing friction plate and apparatus thereof A method of manufacturing a friction plate including a plurality of frictional material segments which are punched into a predetermined shape, and a core plate onto which the plurality of frictional material segments are annularly bonded, comprising step of punching... | 04/18/2006 |
| 7025929 | Method and apparatus for densifying powder metal gears The invention provides a method and apparatus for densifying the teeth of a powder metal preform gear. The die includes an aperture for receiving a body of the gear and a plurality of grooves for receiving the teeth of the gear. The grooves have a length and a varia... | 04/11/2006 |
| 7007536 | Synchronizer sleeve used in power transmission and press-forming apparatus for the same A synchronizer sleeve adapted for use in a gear synchronizer mechanism of a power transmission, the synchronizer sleeve being formed at its inner periphery with inner spline teeth for meshing engagement to be meshed with a clutch gear of a change-speed gear train an... | 03/07/2006 |
| 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 |
| 6981324 | Method of manufacturing net-shaped gears for a differential assembly A differential assembly for a motor vehicle includes a plurality of pinion gears in meshing engagement with a plurality of side gears. At least one of the pinion gears and side gears is formed from a heated tubular preform in a forging die. A method for manufacturin... | 01/03/2006 |
| 6974012 | Sliding collar produced by powder metallurgy A sliding collar has claw internal toothing and teeth projecting from at least one of the end surfaces. The individual teeth have lateral surfaces configured as lateral surfaces of a cone segment or as lateral surfaces of a cone segment and one or more truncated-con... | 12/13/2005 |
| 6939508 | Method of manufacturing net-shaped bimetallic parts A method for manufacturing a net-shaped bimetallic part that includes the steps of: providing a tool that defines a cavity and a tooling surface; depositing a layer of an environmental metal material onto the tooling surface; filling the cavity in the tool with a po... | 09/06/2005 |
| 6935482 | Clutch gear having boss part with spline and method for manufacturing the same A clutch gear having a boss part with a spline which is formed on an outer peripheral surface of the boss part formed on an axial end surface of the clutch gear having jaw clutch teeth formed on an outer peripheral surface thereof, in which the boss part, with the s... | 08/30/2005 |
| 6925899 | Hollow steering rack bar and its manufacturing method Described is a steering rack bar which is low in costs, which is hollowed in overall length, and for use in steering equipment for automobiles. A rack is formed on a first steel tube by plastic working, wherein the first steel tube has good plastic workability by lo... | 08/09/2005 |
| 6907764 | Methods and apparatus for manufacturing flanged articles Methods for manufacturing a flanged article (21) that comprises a central depressed body (27) and a peripheral flange (23) may include press forming a material (10) in order to form an intermediate flanged article (20) that compris... | 06/21/2005 |
| 6898853 | Method for manufacturing a hollow rack shaft A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press-formed into a gutter-like shape. At the second step, a row of rack teeth is press-formed b... | 05/31/2005 |
| 6868607 | Electric power steering apparatus and method of manufacturing gear used therefor The support body engaged with the interior side of the tooth body provided at the worm wheel of the electric power steering apparatus comprises: a corrugated cylinder part press-formed to have a plurality of concavities on the exterior side thereof and convexities t... | 03/22/2005 |
| 6845560 | Method for manufacturing a hollow rack shaft Methods are provided for forming a hollow rack shaft from a workpiece comprising a rectangular plate. The workpiece is first bent into a gutter-like shape using a first die set. Rack teeth are then press-formed in a portion of the gutter-like shape using a second di... | 01/25/2005 |
| 6782598 | Method of manufacturing hollow rack shaft A workpiece for a hollow rack shaft is a substantially rectangular plate. The opposite two sides of this workpiece are respectively provided with a complementary profile composed of the continuation of a convex portion and a concave portion and when the workpiece is... | 08/31/2004 |
| 6779271 | Method for manufacturing a hollow rack shaft A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press formed into a gutter-like shape. The first die set used at this step is provided with slan... | 08/24/2004 |
