Teeth Patents (Class 74/457)
  • Patent number: 9502942
    Abstract: A drive gear has a gear hub with a ledge. A plurality of gear teeth are formed at an outer periphery of the ledge, and centered about a central axis. A mount structure extends axially away from the ledge. A first distance is defined between axial ends of the gear teeth. A second distance is defined between ends of the gear hub. A ratio of the first distance to the second distance is between 0.52 and 0.54. An oil pump, a rotating portion for an electrical generator, and a generator are also disclosed. An oil pump, a rotating portion for an electrical generator, and a generator are also disclosed.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: November 22, 2016
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Eric A. Brust, Ted A. Martin, Brady A. Manogue
  • Patent number: 9309926
    Abstract: A coupling has face gears for transmitting torque or transverse forces between a first part provided with a first face gear and a second part provided with a second face gear complementary to the first face gear. At least one of the parts is a shaft, an axle, a pin or a flange, and it is possible to bring the first face gear into form-fitting engagement with the second face gear. At least one of the face gears has at least one groove having a constant width and a longitudinal centerline forming a semicircular arc having a respective first center of curvature in at least one section of the groove and, in at least one other section of the groove, forming another semicircular arc having a respective second center of curvature.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: April 12, 2016
    Assignee: INVENION GmbH
    Inventor: Erich Schuermann
  • Publication number: 20150101436
    Abstract: A recirculating-ball style gearbox for a vehicle steering system is provided. The gearbox has a rack with rack-teeth that are capable of providing variable ratio steering, where the rack-teeth are in mesh with the involute-teeth of a tapered sector gear. The involute-teeth of the sector gear have arrays of helical meshing lines extending across the meshing surfaces of the teeth, wherein the array of helical meshing lines have leads that decrease in length moving radially outward across the meshing surfaces.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 16, 2015
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Joseph Washnock, Jackson E. Barry, JR., Dale Killins
  • Patent number: 8984981
    Abstract: A sintered gearwheel is described having teeth (1) which, in the flank and root region (2, 3), comprise a compacted surface layer (7, 8, 9) which is continuous in the transition portion (4) between the flank and root region (2, 3) and has a residual porosity of less than 10%. In order to increase the load-bearing capacity it is proposed that the compacted surface layer (9) is formed with a lower thickness in the transitional portion (4) between the flank and root region (2, 3) than in the adjacent flank and root regions (2, 3).
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: March 24, 2015
    Assignee: Miba Sinter Austria GmbH
    Inventors: Alexander Mueller, Horst Roessler, Christian Sandner
  • Patent number: 8967012
    Abstract: A double involute pinion-face gear drive provides transmission of torque and speed, or direction of movement modification between non-intersecting shafts at right angles to one another. A double involute cylindrical pinion on one axis, engages a rotatable disk-shaped gear on the second axis. The teeth of the pinion are curved in an abridged, normal or extended involute shape. Likewise, the teeth of the face gear are curved in abridged, normal or extended involute shape in the lengthwise direction of the teeth. These gear drives can be simultaneously bi-rotational and bi-directional and allow a relatively wide range of speed ratios, as low as 1:1 and as high as 7.5:1.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 3, 2015
    Assignee: GM Global Technology Operations, LLC
    Inventors: Ioan Napau, Mircea Napau
  • Patent number: 8967013
    Abstract: A method of determining an optimized face cone element for spiral bevel and hypoid gears. The form of the root fillet of one member of a gear pair is determined and that from is transferred to the tip of the other member of the gear pair. With the inventive method, tooth root-tip clearance is optimized and the contact ratio is maximized while avoiding root-tip interference between mating gear members.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: March 3, 2015
    Assignee: The Gleason Works
    Inventor: Qi Fan
  • Publication number: 20140366668
    Abstract: A half of a tooth right-angled cross-sectional shape in a tooth bottom side area of a tooth divided at a tooth bottom center as a boundary is defined by a first involute portion extending from the tooth bottom center P0 toward a tooth surface, an arcuate portion connected smoothly to an end portion of the first involute portion, a second involute portion connected smoothly to an end portion of the arcuate portion, a third involute portion connected smoothly to an end portion of the second involute portion, and a tooth surface connecting curved portion connecting an end portion of the third involute portion and the tooth surface smoothly.
    Type: Application
    Filed: June 13, 2014
    Publication date: December 18, 2014
    Inventor: Yasushi KAJIWARA
  • Patent number: 8904895
    Abstract: A worm wheel including first toothing regions transitioning into and on either side of a second toothing region and a complete annular surface on both ends of the worm wheel. The first toothing regions may have a constant outer diameter and the second toothing region may be depressed relative to the first toothing region. The first toothing regions may be globoid toothing regions and the second toothing region may be a cylindrical toothing region.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: December 9, 2014
    Assignee: IMS Gear GmbH
    Inventors: Michael Woehrle, Andreas Voeckt
  • Patent number: 8888374
    Abstract: A bearing with antiskid design used in combination with a circular spline to form a harmonic drive, and the circular spline is provided with an inner toothed portion, the bearing includes: an elliptical gear plug, a flexible ball bearing, and a flexible spline. Between the flexible ball bearing and the flexible spline are disposed a first and second antiskid members, and the arrangement of the first and second antiskid members prevents the axial slippage between the flexible ball bearing and the flexible spline, thus improving stability and transmission accuracy of the harmonic drive.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: November 18, 2014
    Assignee: Hiwin Technologies Corp.
    Inventors: Fang-Ling Nien, Chia-Yin Tsai
  • Patent number: 8857286
    Abstract: A machine tool transmission system includes a driving assembly, a driven gear and at least one transmission gear, at least two positioning gears and at least two retaining gears. The driving assembly includes an input unit and a driving gear driven by the input unit. The transmission gear, positioning gears and retaining gears have respectively a plurality of transmission teeth, positioning teeth and retaining teeth that include respectively a front end tooth and a rear end tooth connecting to the front end tooth and formed at a thickness greater than that of the front end tooth.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: October 14, 2014
    Assignee: Luren Precision Co., Ltd.
    Inventors: Shi-Duang Chen, Tay-Cheng Kuo, Chin-Lung Huang
  • Patent number: 8833192
    Abstract: A functional portion of an edge of each tooth of the toothed wheel has a profile which complies with the parametric double formula (in Cartesian coordinates): x ? ( u ) = R 1 ? [ cos ? ( 1 ? ? ln ? ( 1 - ? ? ? u ) ) - u ? ? sin ? ( 1 ? ? ln ? ( 1 - ? ? ? u ) ) ] y ? ( u ) = R 1 ? [ sin ? ( 1 ? ? ln ? ( 1 - ? ? ? u ) ) + u ? ? cos ? ( 1 ? ? ln ? ( 1 - ? ? ? u ) ) ] where R1=d1 cos(??a tan ?), ? and d1 being parameters, where ? is a parameter which corresponds to the coefficient of friction at the contact between said edge and an edge of a tooth of another wheel, ? being able to take values between 0.05 and 0.5, and where u is a variable which varies in the interval (0, 1/?) such that by varying u, the profile is passed through.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: September 16, 2014
    Assignee: Eta SA Manufacture Horlogere Suisse
    Inventor: Jean-Luc Helfer
  • Patent number: 8733199
    Abstract: A method of manufacturing a gear, and the resulting gear, the method resulting such that the surface layer portions of the tooth portions and a tooth root portion are made to be a carburized layer, the remaining portion of the tooth portions and a portion of a disk portion lying below the carburized layer be a quench-hardened layer, and a region of the disk portion lying deeper than the quench-hardened layer be an unquenched layer. The gear is manufactured using raw material steel having the following chemical composition: C: 0.1% to 0.40% (% by mass), Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, Cr: less than 0.2%, Mo: 0.1% or less, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, N: 0.03% or less, and Fe and unavoidable impurities.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: May 27, 2014
    Assignees: Aisin AW Co., Ltd., Nippon Steel Corporation
    Inventors: Koji Obayashi, Keita Taguchi, Susumu Kato, Shuji Kozawa, Manabu Kubota, Yuji Adachi, Hirokazu Sato
  • Publication number: 20140141929
    Abstract: An article comprises a metal alloy substrate and a plated wear interface layer disposed over a surface of the metal alloy substrate. The wear interface layer has a chemical composition including between about 0.005 wt % and about 0.050 wt % of antimony (Sb), and the balance silver (Ag) and incidental impurities.
    Type: Application
    Filed: November 20, 2012
    Publication date: May 22, 2014
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Thomas R. Hanlon, William P. Ogden, Eli N. Ross
  • Publication number: 20140070794
    Abstract: A non-ferrous shaft includes multiple non-integral ferrous tooth components, thereby allowing a sensor to detect the shaft speed.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 13, 2014
    Inventors: James Cosby, Peter V. Tomeo, Angel L. Santiago, Heriberto Rodriguez, Carney R. Anderson
  • Publication number: 20140033848
    Abstract: The invention relates to a micromechanical part (11, 21, 31, 41, 51, 61) made of a single-piece material. According to the invention, the part has an elementary section formed of at least two secant and non-aligned segments so that one of the at least two segments forms the height (e3) of the micromechanical part (11, 21, 31, 41, 51, 61), the height being greater than the thickness (e1) of each segment. The invention also concerns the method of fabricating the part.
    Type: Application
    Filed: January 5, 2012
    Publication date: February 6, 2014
    Applicant: NIVAROX-FAR S.A.
    Inventors: Pierre Cusin, David Richard, Philippe Dubois
  • Patent number: 8621952
    Abstract: Each generic gear includes one tooth disposed in each of the sockets, and each tooth extends radially outward from one of the sockets and throat thereof. The teeth of the generic gear include resilient material adjacent the throat for compressing and allowing movement of each tooth relative to the outer periphery. In the species of FIG. 1, each tooth is entirely of the resilient material and diverges or circumferentially widens from adjacent the throat to define a gap from the throat to the outer periphery. In the species of FIG. 2, each tooth has a shell integral with the hub and a core of the resilient material fills each shell and extends into the socket to define a crescent-shaped gap with the socket end.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: January 7, 2014
    Assignee: Delphi Technologies, Inc.
    Inventors: Phillip M. Sokolofsky, Gerald M. Goupil, Jr., Craig A. Corra
  • Patent number: 8578807
    Abstract: A gear and drive system utilizing the gear include teeth. Each of the teeth has a first side and a second side opposite the first side that extends from a body of the gear. For each tooth of the gear, a first extended portion is attached to the first side of the tooth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates. The gear may be utilized in drive systems that may have high rotational speeds, such as speeds where the tip velocities are greater than or equal to about 68 m/s. Some embodiments of the gear may also utilize teeth that also have second extended portions attached to the second sides of the teeth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: November 12, 2013
    Assignee: The Penn State Research Foundation
    Inventors: Robert F. Kunz, Richard B. Medvitz, Matthew John Hill
  • Patent number: 8573087
    Abstract: A gear pair set comprising low shaft angle and offset bevel gears and a method for their manufacture including determination of the appropriate gear and pinion blanks and the basic machine settings for their manufacture. The pair of bevel gears comprises a first member and a second member wherein the members of the pair have a shaft angle in the range of greater than 0° to 30°, preferably greater than 0° to 20°, and have an offset in the range of greater than zero to the sum of half the mean pitch diameters of the two members of the bevel gear pair.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: November 5, 2013
    Assignee: The Gleason Works
    Inventor: Hermann J. Stadtfeld
  • Publication number: 20130260152
    Abstract: Apparatus to deliver predetermined forces, containers to hold particulate material and media, media, and the associated parameters for operating such equipment along with methods and compositions provided by the apparatus and methods.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 3, 2013
    Inventors: Scott L. Murray, Jim L. Peyton, Korey Morris
  • Publication number: 20130118283
    Abstract: The invention relates to a toothing, in particular between a starting pinion (22) and a ring gear (25) of an internal combustion engine. The toothing is designed as straight or oblique toothing and comprises a number of individual teeth (202) that mesh with one another. The thicknesses of the individual teeth (212) are asymmetrical, in particular in reduced or widened form on one or both sides.
    Type: Application
    Filed: July 22, 2011
    Publication date: May 16, 2013
    Applicant: ROBERT BOSCH GMBH
    Inventor: Stefan Tumback
  • Patent number: 8424408
    Abstract: The invention relates to the gearing of a gearwheel having a plurality of teeth. The gearwheel has a useful area and a base area of the particular tooth flank form. Viewed in normal section, the tooth base area extends from a base circle up to a useful circle. The tooth flanks of adjacent teeth in normal section are each implemented as symmetrical to one another, the axis of symmetry intersecting the base circle in the base point. According to the invention, the tooth flanks are implemented in the tooth base area as a tangent function from a relevant diameter. The tangent function merges at the relevant diameter in a constant tangent into the tooth flank form of the useful area. The tangent function merges in the tooth base area in a constant tangent into an orbit, which is tangentially applied in the base point to the base circle. Significant increases of the tooth base strength may thus be achieved.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: April 23, 2013
    Assignee: Voith Patent GmbH
    Inventors: Roth Zsolt, Etzold Mathias
  • Publication number: 20130068057
    Abstract: An idler gear assembly for a generator includes a first gear configured for coupling to a second gear. The first gear includes a first shaft aligned along a first shaft axis, the first shaft having a first shoulder with a first axial face and a second shoulder with a second axial face diametrically opposed from the first axial face, diametrically opposed first and second grooves about a circumference of the first shoulder and a first set of teeth circumferentially located about the first shaft axis, the first shaft includes a first axial distance from the first axial face to the second axial face. The second gear includes a second shaft aligned along a second shaft axis, the second shaft having a diametrically opposed first and second tangs, and a second set of teeth circumferentially located about the second shaft axis, the second shaft includes a second axial distance.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 21, 2013
    Applicant: HAMILON SUNDSTRAND CORPORATION
    Inventor: Andrew P. Grosskopf
  • Publication number: 20130008278
    Abstract: A sintered gearwheel is described having teeth (1) which, in the flank and root region (2, 3), comprise a compacted surface layer (7, 8, 9) which is continuous in the transition portion (4) between the flank and root region (2, 3) and has a residual porosity of less than 10%. In order to increase the load-bearing capacity it is proposed that the compacted surface layer (9) is formed with a lower thickness in the transitional portion (4) between the flank and root region (2, 3) than in the adjacent flank and root regions (2, 3).
    Type: Application
    Filed: July 1, 2011
    Publication date: January 10, 2013
    Applicant: MIBA SINTER AUSTRIA GMBH
    Inventors: Alexander Mueller, Horst Roessler, Christian Sandner
  • Patent number: 8312785
    Abstract: An oval gear set for use in a flow meter comprises first and second gears that are identical to each other and that are configured to engage at a fixed center-to-center distance such that the first and second gears mesh at all angular positions. Each gear of the oval gear set comprises a hub and a plurality of gear teeth. The hub comprises an oval body having a major axis and a minor axis extending through a center of the hub, and a root profile wall circumscribing the major and minor axes. The plurality of gear teeth extend from the root profile wall. Each of the gear teeth has a pair of contact surfaces with circular involute curve profiles.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: November 20, 2012
    Assignee: Graco Minnesota Inc.
    Inventors: David L. Breeser, Mark L. Bauck, John C. Holman
  • Patent number: 8286525
    Abstract: A gear including a gear shaft, and a gear wheel made of a resin material, the gear wheel being fixed to the gear shaft by molding. The gear having a plurality of concave portions and convex portions that repeat in a circumferential direction. The plurality of concave and convex portions are arranged such that they extend in the axial direction of the gear shaft, and arranged such that the convex portions of one concave and convex group are adjacent to the concave portions of the other concave and convex group. Due to the relative displacement of the concave portions and the convex portions, stepped portions are formed at a boundary between the concave and convex groups in the circumferential direction of the gear shaft.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: October 16, 2012
    Assignee: Mitsuba Corporation
    Inventor: Hiroji Okabe
  • Publication number: 20120220417
    Abstract: A drive assembly for a vehicle includes a shaft supported on first and second components, a gear wheel for transmitting torque, and a bearing supporting the gear wheel on the shaft, transmitting axial force in a first axial direction between the gear wheel and the first component, and transmitting axial force in a second direction opposite the first direction between the gear wheel and the second component.
    Type: Application
    Filed: March 21, 2011
    Publication date: August 30, 2012
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: David A. Janson
  • Publication number: 20120210812
    Abstract: Gear wheel for a clock mechanism, including a toothed gear provided with a homogeneous integral peripheral tooth system with at most 16 teeth in a first meshing level; a first meshing sector that is rotationally fixed with the toothed gear and meshes in a second meshing level, wherein the first meshing level is superposed on a first tooth of the toothed gear; a second meshing sector that is rotationally fixed with the toothed gear and meshes in a third meshing level, wherein the second meshing level is superposed on a second tooth of the toothed gear; a third meshing sector that is rotationally fixed with the toothed gear and meshes in a fourth meshing level, wherein the third meshing level is superposed on a third tooth of the toothed gear.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 23, 2012
    Applicant: Glashuetter Uhrenbetrieb GmbH
    Inventor: Peter SCHMIDT
  • Patent number: 8132480
    Abstract: A pump gear includes a pump gear body having involute teeth that each have an involute surface that extends between a tooth tip and a tooth base. The involute surface includes at least reference points A-D, with reference point A near the base, reference point D near the tip, reference point B between reference points A and D, and reference point C between reference points B and D. The reference points A-D have associated respective roll angles, ?A-D, between a corresponding first line that is perpendicular to the involute surface at the given reference point A-D, and a second line that is tangent at a reference point that lies on a terminal end of the involute surface at the tooth base to a reference base circle having a center origin at the center axis.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: March 13, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Edward C. Allen, Andrew P. Grosskopf, Brady A. Manogue, Eric A. Brust
  • Publication number: 20120023995
    Abstract: An ice-making assembly for a refrigerator, which can effectively separate ice from a tray and a power transmission assembly for transmitting power to the tray are provided. The power transmission assembly includes a body unit defining an exterior of the ice-making assembly and a plurality of gear teeth protruding from an outer circumference of the body unit. Each of the gear teeth includes a first end portion protruding from the body unit by a predetermined distance and a second end portion further protruding from the body unit than the first end portion. According to the embodiments, even when the water is infiltrated into the power transmission assembly and frozen, the frozen ice can be removed in a direction by the above-described structures of the gears.
    Type: Application
    Filed: September 1, 2008
    Publication date: February 2, 2012
    Inventor: Byoung-Jun Lee
  • Patent number: 8070640
    Abstract: A fluctuating gear ratio limited slip differential assembly is provided that includes a differential case and a pair of side gears disposed within the differential case. Each of the side gears may have a tooth with a first tooth flank. The differential assembly may further include a pinion shaft disposed within the differential case and a plurality of pinions supported by the pinion shaft. The pinions may be configured for engagement with the pair of side gears and each of the pinions may have a tooth with a second tooth flank. The first and second tooth flanks are configured to cause movement of the plane of action defining all contact points between the first tooth flank of the side gears and the second tooth flank of the pinions in a predetermined and/or controlled manner.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: December 6, 2011
    Assignee: Eaton Corporation
    Inventor: Stephen P. Radzevich
  • Patent number: 8061229
    Abstract: The inventive gear drive comprises toothed wheels with teeth of toothed crowns interacting with single- or multi-flow elements. Working profiles of the interacting teeth comprise piecewise and/or pointwise conjugate, convex at a tooth point and concave at a tooth root arc-shaped sections continuously connectable to each other or to involute sections. The interacting toothed crowns are so embodied that a phase gap of the face tooth intermating at a discrete angle from a point, where the interaction of profiles ends at a point, where the interaction of the face profiles of the next tooth pair starts. The drive is so embodied that the face tooth overlap ratio thereof is less than 1. The so improved teeth provide for high level of the contact tightness and absence of axial forces at engagement, increase the structural flexibility of the gear drive teeth in order to improve their qualities.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: November 22, 2011
    Inventor: German Alexandrovich Zhuravlev
  • Patent number: 8024989
    Abstract: Provided are a gear and a gear drive unit which allow oil film formation to a sufficient degree between tooth surfaces of gears rotating at high-speed and which help to prevent generation of pitting, abrasion, and prevent scoring, temperature rise, and wear to thereby achieve an improvement in terms of durability. A tooth surface is provided with a multitude of minute recesses arranged at random, in which an axial surface roughness parameter Ryni of the surface thus provided with the recesses is set to a range: 0.8 ?m?Ryni?2.3 ?m. As a result, the tooth surface is endowed with a high oil film formation performance, and it is possible to attain a long service life even under a low-viscosity/thin-lubrication condition in which the oil film is extremely thin.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: September 27, 2011
    Assignee: NTN Corporation
    Inventors: Masanori Satou, Yoshiyasu Nakano, Katsufumi Abe
  • Publication number: 20110226077
    Abstract: Apparatus for use in a variable ratio transmission has gear teeth (12) formed for engaging a facing gear wheel, each having a plane of symmetry (P) parallel to a width of the tooth. Links (30) rigidly associated with the gear teeth are sequentially interconnected to form hinge joints (32) between adjacent pairs of gear teeth, thereby forming a gear tooth sequence (11). The hinge joint (32) for each pair of adjacent gear teeth has an axis of rotation (34) lying on a plane (B) bisecting an angle between the planes of symmetry (B) of the adjacent gear teeth.
    Type: Application
    Filed: December 10, 2009
    Publication date: September 22, 2011
    Applicant: IQWIND LTD.
    Inventors: Nimrod Eitan, Joseph Etzion
  • Publication number: 20110219898
    Abstract: A gear structure comprising: a reinforcement member fixed onto a side surface of a gear; and a fixation section configured to fix the reinforcement member onto the side surface of the gear, the fixation section being provided on a line of contact action of the gear.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 15, 2011
    Inventor: Yoshitaka MIURA
  • Patent number: 7992462
    Abstract: In a resin double-helical gear formed by injection-molding, smooth meshing of teeth can be performed for rotation of the resin double-helical gear in both directions, and occurrences of thrust-direction load and noise can be prevented. Peak-side tooth flanks 7c and 7d and valley-side tooth flanks 7e and 7f of a tooth 7 in a resin double-helical gear 1 are formed such as to become farther away from peak-side tooth flanks 9c and 9d and valley-side tooth flanks 9e and 9f of a standard tooth 9 in an inward direction, the closer the peak-side tooth flanks 7c and 7d and the valley-side tooth flanks 7e and 7f are to a tooth width direction center section 3 from one tooth width direction end section 4a and another tooth width direction end section 4b. As a result, meshing escape sections g (g1 and g2) and h (h1 and h2) having dimensions in a tooth thickness direction that increase towards the tooth width direction center section 3 are formed on the peak-side tooth flank side and the valley-side tooth flank side.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: August 9, 2011
    Assignee: Enplas Corporation
    Inventor: Toru Takumori
  • Publication number: 20110138951
    Abstract: A wind turbine is provided having a tower, a nacelle supported by the tower and a rotor with one or more blades and a hub. A gearbox is connected to the rotor and includes one or more gears having a wear indicating line that facilitates identification of gear wear. The wear indicating lines are located on side surfaces of the one or more gears.
    Type: Application
    Filed: September 28, 2010
    Publication date: June 16, 2011
    Inventors: Aaron John Mashue, James Warren Pemrick
  • Patent number: 7950305
    Abstract: In the toothing system (1) of a gearwheel having a plurality of teeth (2, 3; 19) whose tooth flanks (4, 5, 6; 22) have involute form above a tooth-root region (7, 8, 9; 23) of the tooth flanks (4, 5, 6; 22), the tooth-root region (7, 8, 9; 23) of the tooth flanks (4, 5, 6; 22) that, as viewed in normal section, extends between a root useful point (15, 16, 17; 23) and a root point (F) has elliptical shape, tangentially adjoins the involute region of the tooth flank (4, 5, 6; 22) at the root useful point (15, 16, 17; 24) and tangentially contacts the root circle (FKS) at the root point (F). In its tooth-root region (7, 8, 9; 23), the tooth flank (4, 5, 6; 22), as viewed in normal section, substantially follows a partial section (B) of an ellipse (10, 11, 12; E) whose semiaxes (a, b) have different lengths, one semiaxis (a, b) of the ellipse (10, 11, 12; E) being inclined at an ellipse tilting angle alpha larger than 0° and smaller than 90° relative to a radial (R) through the root point (F).
    Type: Grant
    Filed: January 20, 2007
    Date of Patent: May 31, 2011
    Assignee: Sona BLW Prazisionsschmiede GmbH
    Inventors: Peter Gutmann, Jin Hong Li
  • Patent number: 7926380
    Abstract: A resin gear has a plurality of teeth on an outer periphery thereof. One surface of each tooth has a tooth plane which meshes with another gear. The tooth thickness is substantially uniform from a tooth tip to a tooth root. A reinforcing rib is provided on the surface of each tooth on the opposite side from the tooth plane.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: April 19, 2011
    Assignee: Murata Machinery, Ltd.
    Inventor: Masahiro Fujimaru
  • Publication number: 20110017006
    Abstract: The present invention is directed to a method and apparatus for processing a metallic gear comprising providing a gear, directing a first peening media at the metallic gear thereby exposing a plurality of surfaces on the metallic gear to the first peening media whereby the strength and wear properties of the teeth roots of the gear are enhanced, directing a second peening media at the metallic gear thereby exposing a plurality of surfaces on the metallic gear to the second peening media whereby the KSI of the surface of the gear is enhanced, providing a container, placing a fine finishing medium in the container, placing the gear with the fine finishing medium in the container, coupling vibrations to the container to vibrate the fine finishing medium with the wetted gear, removing the gear from the container, washing the gear and rinsing the gear with rust inhibitor.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 27, 2011
    Inventor: Michael J. WERN
  • Patent number: 7861411
    Abstract: 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: Grant
    Filed: May 2, 2007
    Date of Patent: January 4, 2011
    Assignee: The Boeing Company
    Inventor: Stepan V Lunin
  • Publication number: 20100300229
    Abstract: The invention aims to improve not only the resistance to abrasion and scoring, but also the fatigue strength against pitting and chipping, without increasing the number of steps of the manufacturing process. The tooth face 2 of the gear is smoothed by gyro polishing. In the thus smoothed tooth face 2, a multitude of microscopic recesses 3 are randomly formed by liquid honing in which microscopic hard particles are collided with the tooth surface together with liquid. By the liquid honing, a large compressive residual stress is produced on the tooth face 2. This improves not only the resistance to abrasion and scoring, but also the fatigue strength against pitting and chipping, without increasing the number of steps of the manufacturing process.
    Type: Application
    Filed: November 21, 2008
    Publication date: December 2, 2010
    Inventors: Masanori Sato, Katsufumi Abe
  • Publication number: 20100269617
    Abstract: The invention relates to a method of producing an abradable polymer coating (5), optionally containing at least one solid lubricant, on a surface of teeth (7, 8) of a metal toothed element (1, 2) for setting a tooth flank clearance (4) between the teeth (7, 8) of two meshing toothed elements (7, 8), whereby the abradable polymer coating (5) is applied to at least part of a surface of the teeth (7) of at least one toothed element (7, 8). Prior to applying the polymer coating (5), the surface to be coated is treated in a plasma and the polymer coating (5) is then applied directly to this surface.
    Type: Application
    Filed: December 15, 2008
    Publication date: October 28, 2010
    Applicant: High Tech Coatings GmbH
    Inventor: Guenter Eitzinger
  • Publication number: 20100266299
    Abstract: An image forming apparatus includes a rotating member, a motor configured to rotate the rotating member, and a marking member having primary and secondary portions. The image forming apparatus also includes a mark sensor configured to detect the primary and secondary portions, and output a primary signal and a secondary signal, and a position sensor configured to determine a rotational position of the rotating member based on a primary reception time of one of the primary and secondary signals that comes immediately after the other of the primary and secondary signals when the position sensor receives the other of the primary and secondary signals at a start of a mark detecting operation. Further, the image forming apparatus includes a motor controller configured to control the motor based on the recognition result and make the rotational position consistent with a target position at a predetermined time during the mark detecting operation.
    Type: Application
    Filed: June 29, 2010
    Publication date: October 21, 2010
    Inventors: Noriaki Funamoto, Joh Ebara, Toshiyuki Uchida
  • Publication number: 20100230347
    Abstract: Apparatus for managing layers of different density includes an enclosed tank for holding the liquids so that they stratify into separate layers of different levels in the tank. A conduit for liquid in the tank is open at an inner end to the tank interior, and is open at an outer end to the tank exterior. A drive moves the inner end of the conduit to different levels within tank so liquid can be transferred into or out of different levels in the tank. The drive preferably being a gear mechanism employing woodruff-type tabs.
    Type: Application
    Filed: March 9, 2010
    Publication date: September 16, 2010
    Inventor: Keith R. Haslem
  • Patent number: 7770484
    Abstract: There are provided a resin double helical gear capable of reducing operation noises and vibrations of an ink jet printer, and a gear train for an ink jet printer using the same. The gear train 2 for an ink jet printer 1 includes an output gear 5 of a motor 3, a first idle gear 6 meshing with the output gear 5, a second idle gear 7 rotatable with the first idle gear 6, and a driven gear 8 which is mounted on a roller shaft 13 so as to be rotatable therewith and which meshes with the second idle gear 7, wherein a resin double helical gear 101 is used as each of the output gear and the first idle gear, and a spur gear is used as each of the second idle gear and the driven gear. The resin double helical gear may have a meshing relief portion 113 by cutting a chevron-shaped top portion 104 in a central portion 103 in face width directions, which is arranged in a butt portion 113 between a first die 108 and a second die 110, from a tooth crest to a portion near a bottom land so as to decrease a tooth thickness.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: August 10, 2010
    Assignee: Enplas Corporation
    Inventor: Toru Hagihara
  • Publication number: 20100132496
    Abstract: A gear is provided having a tooth form shape in which stress concentration on a tooth root side including a bottom does not easily occur and strength of the tooth can be enhanced. On a tooth root side of a tooth 2, (1) a first curved surface 4 smoothly connected to a tooth face 3 of an involute tooth form and convex in a direction opposite to the tooth face 3, (2) a flat surface 5 connected to the first curved surface, and (3) a second curved surface 6 smoothly connected to the flat surface 5 and convex in the same direction as the first curved surface are formed. The shape of the flat surface 5 in a normal plane is a tangent in contact with a tip side end of a trajectory of motion B of a tooth of a meshing partner gear and intersecting with a tooth form center line 7 at a 30° angle when the end of the flat surface 5 on the first curved surface 4 side is extended.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 3, 2010
    Inventor: Shinichirou Okamoto
  • Patent number: 7726959
    Abstract: According to one embodiment of the invention, a gerotor apparatus includes an outer gerotor having an outer gerotor chamber, an inner gerotor, at least a portion of which is disposed within the outer gerotor chamber, and a synchronizing apparatus operable to control the rotation of the inner gerotor relative to the outer gerotor. The inner gerotor includes one or more entrance passages operable to communicate a lubricant into the outer gerotor chamber.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: June 1, 2010
    Assignee: The Texas A&M University
    Inventors: Mark T. Holtzapple, George A. Rabroker
  • Publication number: 20100071495
    Abstract: Provided are a gear in which oil film formation between the tooth surfaces of gears rotating at high speed can be effected to a sufficient degree, in which generation of pitting, abrasion, and scoring is prevented, and which helps to prevent an increase in temperature and wear to achieve an improvement in durability, and a gear drive unit. A multitude of minute concave recesses are provided at random on a tooth surface, and an average area of the recesses is set to a range of 160 to 740 ?m2. Accordingly, the tooth surface can obtain a high oil film forming capacity. Thus, even under a low-viscosity/thin-lubrication condition in which the thickness of the oil film is extremely small, it is possible to achieve a long service life.
    Type: Application
    Filed: October 23, 2006
    Publication date: March 25, 2010
    Applicant: NTN CORPORATION
    Inventors: Masanori Satou, Yoshiyasu Nakano, Katsufumi Abe
  • Publication number: 20100064831
    Abstract: Disclosed are systems, assemblies, and components that relate to power transfer. In particular, the disclosed systems includes a transmission that offers variable speeds and changes between different gear ratios while maintaining constant engagement. Constant engagement may be maintained by tooth-to-tooth contact to be scalable for a variety of applications. An example system includes a phase shifting mechanism. The phase shifting mechanism may include an eccentric gear that provides an oscillating output. The oscillating output creates an overall gear ratio change that slides between gear ratios, thereby allowing changes to occur in small, and possibly infinitely small increments. According to one example, an eccentric gear has a changing base radius and includes a tooth with a hybrid profile that has a base the width of an initial profile, and a width at a top of the tooth that is that of a final profile.
    Type: Application
    Filed: September 14, 2009
    Publication date: March 18, 2010
    Inventors: Gary D. Lee, William M. Decker, Brandon Levi Haupt, Isaac Reo Jones, Robert H. Todd, Carl D. Sorensen, Kenneth W. Chase
  • Publication number: 20100031764
    Abstract: 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: Application
    Filed: October 16, 2009
    Publication date: February 11, 2010
    Applicant: Neumayer Tekfor Holding GmbH
    Inventor: Matthias Derse