With Specific Gear Material Patents (Class 29/893.37)
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Patent number: 9802640Abstract: A ball screw assembly includes a helical path for a plurality of balls to be routed through, the helical path extending from a first end to a second end. The ball screw assembly also includes a recirculation path extending from a first transition location to a second transition location. The recirculation path includes a first segment defined by a first arc portion of a first ellipse. The recirculation path also includes a second segment defined by a second arc portion of the first ellipse. The recirculation path further includes a third segment defined by an arc of a second ellipse, wherein the first ellipse and the second ellipse are disposed in a common plane.Type: GrantFiled: September 25, 2015Date of Patent: October 31, 2017Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: Paul E. Kern, Eric D. Pattok
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Patent number: 9604698Abstract: A bicycle cogset comprises a sprocket base, a first sprocket, and a second sprocket. A periphery of the sprocket base is provided with a plurality of connecting arms, and each of the connecting arms is provided with at least one first and one second connection hole respectively. The first sprocket has a first outer portion and a first inner portion, the first outer portion provided with a plurality of first teeth, the first inner portion provided with a plurality of first insertion members, and the first insertion members disposed in the first connection holes. The second sprocket has a second outer portion and a second inner portion, the second outer portion provided with a plurality of second teeth, the second inner portion provided with a plurality of second insertion members, and the second insertion members disposed in the second connection holes.Type: GrantFiled: October 22, 2014Date of Patent: March 28, 2017Assignee: TIEN HSIN INDUSTRIES CO., LTD.Inventors: Wen-Feng Tsai, Wen-Nan Liao
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Patent number: 9568085Abstract: A straight bevel gear having a gear body that includes a first set of gear teeth and at least one web. The set of gear teeth may have a spherical involute configuration. The web may extend between adjacent members of the set of gear teeth such that the web may be completely and continuously curved in multiple directions.Type: GrantFiled: August 13, 2014Date of Patent: February 14, 2017Assignee: ArvinMeritor Technology, LLCInventors: Wagner Hirao, Silvio Masaaki Yamada
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Patent number: 8595934Abstract: A method of producing a composite body, such as a gear wheel or torsional vibration damper, including a radially inner hub body provided with outer profiles, a surrounding outer body provided with inner profiles, and an intermediate layer of synthetic resin material which connects the outer profiles of the hub body with the inner profiles of the outer body; the hub body being with an inner contour adapted to mount the composite body on a shaft.Type: GrantFiled: September 27, 2011Date of Patent: December 3, 2013Assignee: Neumayer Tekfor Holding GmbHInventor: Matthias Derse
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Patent number: 8307551Abstract: A method for producing an at least partially surface-densified metallic toothed element comprising a densified sintering material, in order to improve a strength profile, a preform of the toothed element being produced with a locally selective oversize relative to a final size of the toothed element and being rolled to the final size by means of at least one rolling die, the toothed element being densified in locally varied manner at least in the region of at least one flank and/or one root of a tooth of the toothed element to produce a densified outer layer.Type: GrantFiled: December 10, 2007Date of Patent: November 13, 2012Assignee: GKN Sinter Metals Holding GmbHInventor: Gerhard Kotthoff
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Publication number: 20120227530Abstract: The present invention relates to surface densification of a work piece that comprises at least one toothed section made from sintering material, wherein a first surface of the work piece is densified using a different from a second surface of the work piece.Type: ApplicationFiled: March 16, 2012Publication date: September 13, 2012Inventor: Gerhard Kotthoff
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Patent number: 8220153Abstract: A production method for complex bearings includes: preparing an outer member and a cylindrical sintered bearing member. The outer member includes a fitting hole having: an almost circular cross section; an inner peripheral surface; and a surface roughness of the inner peripheral surface which is 3.2 to 100 ?m at a maximal height. The sintered bearing member includes: an outer diameter allowing clearance fit of the sintered bearing member into the fitting hole of the outer member. The production method further includes: inserting the sintered bearing member into the fitting hole of the outer member and inserting a columnar core rod into an inner peripheral surface of the sintered bearing member; and compressing the sintered bearing member in an axial direction.Type: GrantFiled: May 22, 2007Date of Patent: July 17, 2012Assignee: Hitachi Powdered Metals Co., Ltd.Inventor: Makoto Kondo
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Patent number: 8118958Abstract: A composite ring gear (10) with a metallic gear insert (30) has at least one filament (34) wound about the gear insert and an eyelet (32) a plurality of times. The filament is adapted to withstand a portion of a tensile load transmitted between the insert and the eyelet. The insert, eyelet and filament are then embedded in a composite material.Type: GrantFiled: April 27, 2007Date of Patent: February 21, 2012Assignee: Moog Inc.Inventors: Stepan V. Lunin, Lotfi El-Bayoumy
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Patent number: 7861411Abstract: A composite gear and method of making same. In one embodiment the gear includes a body portion having a plurality of teeth. The gear is formed by placing it in a suitable tool such that a compressive stress is exerted on the teeth adjacent the root portion of each tooth. A portion of the gear adjacent the teeth is wrapped with a resin fibrous material that is allowed to cure while the compressive stress is maintained on the gear. When the resin fibrous material has at least substantially cured and the gear is removed from the tool, a permanent compressive stress is formed at the root portion adjacent each tooth. The compressive stress counteracts the tension stress that is experienced at the root portions of the teeth when the gear is in use, thus significantly strengthening (i.e., toughening) the gear and increasing its fatigue life.Type: GrantFiled: May 2, 2007Date of Patent: January 4, 2011Assignee: The Boeing CompanyInventor: Stepan V Lunin
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Publication number: 20100200123Abstract: A method and apparatus are present for manufacturing a part. The part is comprised of a metal alloy and is positioned to form a positioned part. An electromagnetic field is generated that heats the positioned part. A surface of the positioned part is exposed to an inert gas, while the electromagnetic field is generated to create an inverse thermal gradient between an exterior of the positioned part and an interior section of the positioned part to form a heat treated part.Type: ApplicationFiled: February 11, 2009Publication date: August 12, 2010Inventors: Brad L. Kirkwood, Marc R. Matsen, Tony Shen, Wesley B. Crow
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Patent number: 7621047Abstract: A transmission shift mechanism for use with a vehicle transmission. The transmission shift mechanism includes a user-operated selector and a sub-assembly operably disposed between said user-operated selector and the vehicle transmission. The sub-assembly includes a torque-transfer member having a first portion and a second portion wherein the first portion is pivotally secured to the transmission shift mechanism about a pivot axis and the second portion defines a section of a substantially spherical surface which is engageably disposed within a non-linear camming slot defined by the transmission shift section. The torque-transfer member takes the form of a molded polymeric body with a sheet metal insert disposed within the molded polymeric body. The second portion of the torque-transfer member may include flats to reduce the volume of polymeric material required in the manufacture of the member. A method of manufacturing such a torque-transfer member or crank arm is also disclosed.Type: GrantFiled: April 19, 2007Date of Patent: November 24, 2009Assignee: Delphi Technologies, Inc.Inventor: Michael C. Vermeersch
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Publication number: 20090133982Abstract: The invention relates to a synchronising ring for a synchronising apparatus of a change speed transmission, including a synchronising ring body with a friction lining, the friction lining being provided in a pre-determinable width between a first axial boundary surface of the friction lining and a second axial boundary surface of the friction lining in the circumferential direction around an axial synchronising ring axis of the synchronising ring on the friction surface, in such a way that the friction lining extends conically at a pre-determinable friction angle ? about the synchronising ring axis. In this arrangement a macrogeometric groove is provided in the friction lining for the taking up and/or for the transport of a fluid in such a way that a flow connection is created by the macrogeometric groove for the fluid between the first axial boundary surface and the second axial boundary surface.Type: ApplicationFiled: August 21, 2008Publication date: May 28, 2009Inventors: Ulf Christoffer, Marcus Spreckels
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Publication number: 20080271317Abstract: A composite gear and method of making same. In one embodiment the gear includes a body portion having a plurality of teeth. The gear is formed by placing it in a suitable tool such that a compressive stress is exerted on the teeth adjacent the root portion of each tooth. A portion of the gear adjacent the teeth is wrapped with a resin fibrous material that is allowed to cure while the compressive stress is maintained on the gear. When the resin fibrous material has at least substantially cured and the gear is removed from the tool, a permanent compressive stress is formed at the root portion adjacent each tooth. The compressive stress counteracts the tension stress that is experienced at the root portions of the teeth when the gear is in use, thus significantly strengthening (i.e., toughening) the gear and increasing its fatigue life.Type: ApplicationFiled: May 2, 2007Publication date: November 6, 2008Inventor: Stepan V. Lunin
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Publication number: 20080201951Abstract: The present invention relates to surface densification of a work piece that comprises at least one toothed section made from sintering material, wherein a first surface of the work piece is densified using a different from a second surface of the work piece.Type: ApplicationFiled: December 10, 2007Publication date: August 28, 2008Inventor: Gerhard Kotthoff
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Patent number: 7207231Abstract: 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 (70) into a die assembly (60) having internal rack tooth forms (68). The rack tube (30) and the pressed powder metal (70) are sintered to complete formation of the rack (20).Type: GrantFiled: August 6, 2002Date of Patent: April 24, 2007Assignee: TRW Automotive U.S. LLCInventor: John Saarinen
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Patent number: 7163754Abstract: 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 weight % iron, cobalt, nickel, or alloys thereof. A method of producing a wear and corrosion resistant sprocket includes: (i) machining a base steel member to form an outer toothed profile surface thereon; (ii) applying a coating to at least a portion of the surface; and (iii) fusing the coating to the base steel member.Type: GrantFiled: October 23, 2003Date of Patent: January 16, 2007Assignee: Deere & CompanyInventors: Gopal S. Revankar, Timothy D. Wodrich, Todd B. Niemann
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Patent number: 7155824Abstract: 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 shaft into the hole in the pinion, and securing the shaft to the pinion.Type: GrantFiled: March 17, 2004Date of Patent: January 2, 2007Assignee: American Axle & Manufacturing, Inc.Inventor: Bryan P. Prucher
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Patent number: 7117598Abstract: 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 die. A method for manufacturing a differential assembly is also provided.Type: GrantFiled: October 21, 2003Date of Patent: October 10, 2006Assignee: American Axle & Manufacturing, Inc.Inventor: Stephen L. Prucher
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Patent number: 7111395Abstract: 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 deformation by the overmeasure by pressing in a counter-toothing (3) of a pressing tool (2) which engages in the toothing (4). In order to provide advantageous conditions it is proposed that during the plastic deformation of the flank or foot region of the tooth, the tip surface of the respective tooth is subjected to a pressure force counteracting an extension of the tooth.Type: GrantFiled: November 28, 2001Date of Patent: September 26, 2006Assignee: Miba Sintermetall GmbHInventor: Christian Sandner
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Patent number: 6948245Abstract: In order that a worm 1 is rotated, a clearance (a region constituting a clearance portion between bearings and a worm gear) is formed (FIGS. 4(1) to (3)) in an upper surface of a base plate 3. A mold 12 for forming a lower half region of the worm therein is formed (FIG. 4(8)). A material 5 for the worm is deposited (FIG. 4(9)) to a height equal to that of a lower half region plus that of an upper half of the worm. An upper half of the worm is formed (FIGS. 4(10) to (12). Finally, the material 13 in the clearance between the base plate 3 and gear 1 is removed (FIG. 4(13)).Type: GrantFiled: December 4, 2000Date of Patent: September 27, 2005Inventor: Takashi Nishi
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Patent number: 6874231Abstract: A rigid internal gear 2 of the wave gear device is composed by integrating a tooth-forming ring 12 formed with internal teeth, and a main gear ring 11 into a single body. The tooth-forming ring 12 is manufactured from a ferrous or copper material that has superior strength and abrasion resistance, while the main gear ring 11 is manufactured from a lightweight material, such as an aluminum alloy. The outer circumferential surface of the tooth-forming ring 12 is aluminized to form a dispersed aluminum coating 15, before the tooth-forming ring 12 is cast within the main gear ring 11 so as to integrate the main gear ring 11 and the tooth-forming ring 12. Both parts are reliably integrated so that a large amount of torque can be transmitted, whereby realizing a rigid internal gear that is lighter than conventional models.Type: GrantFiled: July 11, 2003Date of Patent: April 5, 2005Assignees: Harmonic Drive Systems Inc., Harmonic Drive AktiengesellschaftInventors: Masaru Kobayashi, Yoshihiro Tanioka
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Patent number: 6670048Abstract: A sintered sprocket is provided in which surface pressure resistance can be improved without using a forging processing. An Fe-based sintered alloy which contains C at 0.2 to 0.5% by weight, Mo at 0.2 to 1.0% by weight, and Ni at 0.2 to 1.0% by weight, and which exhibits a metallic structure in which an internal base layer comprises ferrite and bainite and in which the ferrite adjoins voids, is subjected to a rolling and is then subjected to carburizing and hardening.Type: GrantFiled: May 29, 2002Date of Patent: December 30, 2003Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Akira Fujiwara
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Patent number: 6638390Abstract: A process for manufacturing polymer/metal disks in a single piece batch size comprises applying a bonding agent to a metallic hub, pressing a polymeric ring over the metallic hub to form a ring/hub assembly, and heating the ring/hub assembly to cause bonding to occur between the polymeric ring and the metallic hub. The bonding agent may either be sprayed or applied directly to the metallic hub. Other methods of application may also be employed, such as dipping of the metallic hub in the bonding agent. The bonding agent is generally an organosilane, although other compounds capable of bonding a polymer to a metallic substrate can be used. The pressing of the polymeric ring over the metallic hub comprises enlarging the polymeric ring and mounting it over the metallic hub. The enlargement of the polymeric ring is typically effectuated either with heat or by stretching.Type: GrantFiled: December 4, 2000Date of Patent: October 28, 2003Assignee: Delphi Technologies, Inc.Inventors: Bradley J Sizelove, Steven J Schultz, David E. Witucki, Todd Fredrick Jammer, William W Heminghous
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Patent number: 6561945Abstract: A laminated carrier comprises a first end plate, a second end plate, and a connection joining the first and second end plates together such that windows are formed therebetween for locating planetary gears. At least one of the first and second end plates comprises multiple layers of material joined together, such that a non-uniform internal structure is formed.Type: GrantFiled: June 19, 2001Date of Patent: May 13, 2003Assignee: The Torrington CompanyInventors: Charles W. Shattuck, Christopher Kaswer, Phillip J. Draper, Mitchell Bussell
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Patent number: 6557663Abstract: An electric power steering apparatus including a reduction mechanism 5 for transmitting an output of a steering assist motor 1 to a steering mechanism through a worm 3 and a worm wheel 4, in which the worm wheel 4 is formed by a thermosetting synthetic resin filled with a sheet 6 of aramid fibers having a low attacking property to a counter member and an effect of improving the abrasion resistance of the synthetic resin. Even when the reduction mechanism is used in an engine room or the temperature of the reduction mechanism is raised by frictional heat with heightening power, the reduction mechanism is durable, and further the gears have excellent abrasion resistance and toughness and improved durability.Type: GrantFiled: July 27, 2001Date of Patent: May 6, 2003Assignees: Koyo Seiko Co., Ltd., Shin-Kobe Electric Machinery Co., Ltd.Inventors: Takanori Kurokawa, Hirokazu Arai, Shinichi Tahara, Syouji Sawai
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Patent number: 6478016Abstract: A centrifugal supercharger includes a gear-type transmission for drivingly connecting the impeller to the engine. The transmission includes an impeller shaft supporting the impeller and being fixed relative to one of the gears of the transmission. The preferred impeller shaft and gear fixed thereto are integrally formed of cast iron so as to dampen propagation of sound waves to the impeller, thereby reducing the amplification of transmission noise by the impeller. Depending upon the desired horsepower gains provided by the supercharger, the impeller shaft preferably has a minimum shaft diameter.Type: GrantFiled: September 22, 2000Date of Patent: November 12, 2002Assignee: Accessible Technologies, Inc.Inventor: Glennon J. Roderique
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Patent number: 6343418Abstract: A spinning reel face gear is manufactured by a method of molding tooth-ring bearing, obverse-facing gear teeth onto a separately formed gear disk after the gear disk is made. The gear disk is specially configured with circumferentially spaced peripheral indentations to retain the tooth ring strongly against torque when the face gear meshes with a pinion gear in operation in a spinning reel. Manufacturing the face gear in two separate stages adds a degree of freedom in material selection, allowing a lightweight material to be employed for the gear disk, and a high-strength material for forming precision gear teeth to be employed for the tooth ring. The two-stage manufacturing method also enables the tooth ring to be formed onto the gear disk in a mold that does not leave a parting line on the obverse, teeth-bearing face of the tooth-ring when the mold plates are parted.Type: GrantFiled: June 23, 2000Date of Patent: February 5, 2002Assignee: Shimano Inc.Inventor: Yasuhiro Hitomi
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Patent number: 6330836Abstract: 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.Type: GrantFiled: March 30, 2000Date of Patent: December 18, 2001Assignee: Fujikiko Kabushiki KaishaInventors: Hiroshi Watanabe, Masakiyo Ohya, Masato Shibata