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| Number | Title | Issue Date |
| 8061229 | Gear drive 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 ro... | 11/22/2011 |
| 8024989 | Gear and gear drive unit 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 there... | 09/27/2011 |
| 7992462 | Resin double-helical gear 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 ... | 08/09/2011 |
| 7950305 | Toothing system of a gearwheel having involute roller toothing 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 (... | 05/31/2011 |
| 7437967 | Gear having window holes, and method and apparatus for manufacturing the same A gear having window holes, and method and apparatus for mafufacturing the same in which by depressing partially one end surface of a primary formed article, a plurality of concaves for the window holes is formed at the one end surface in an axial direction of the p... | 10/21/2008 |
| 7415907 | Resin double helical gear and gear train using same A gear train for an ink jet printer includes an output gear of a motor, a first idle gear meshing with the output gear, a second idle gear rotatable with the first idle gear, and a driven gear which is mounted on a roller shaft so as to be rotatable therewith and wh... | 08/26/2008 |
| 7377355 | Motor-driven power steering apparatus for a vehicle In a motor-driven power steering apparatus for a vehicle in which a worm wheel of a worm gear type speed reduction mechanism is fixed to a pinion shaft of a rack and pinion mechanism, a direction of a torsion angle β of a helical pinion provided in the pinion shaft... | 05/27/2008 |
| 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 |
| 7267024 | Gear, and method and apparatus for manufacturing the same An idler gear having a part worked by cutting is formed such that a chamfer part is formed at least on a portion between a tooth shape and chamfers are formed on the tooth shape by a forging process on an outer peripheral surface and an end part thereof in an axial ... | 09/11/2007 |
| 7258037 | Gear protected against overloading The invention concerns a gear for precision devices comprising at least two mutually co-operating toothed wheels (10, 14). The teeth (12, 16) of the two wheels have the same thickness (e) and the teeth of one of them (10) are provided with a rad... | 08/21/2007 |
| 7255018 | Transmission with low shaft deflection A transmission (1) having at least one transmission input shaft (4), at least one countershaft (5), one reverse gear shaft (30) and at last one transmission output shaft (6) in which, upon at least one transmission input shaft and ... | 08/14/2007 |
| 7191521 | Advanced geometry of skew and straight bevel gears produced by forging The present invention provides for bevel gears having a localized and stable bearing contact. The localization of bearing contact is achieved by substitution of flat tooth surfaces with parabolic tooth surfaces. This is accomplished by either modifying line-contact ... | 03/20/2007 |
| 7176643 | Motor control apparatus Before an amount of play in a rotation transmitting system is learned, for selecting a gear range, an overshooting control process is performed to cause the angular displacement of a motor to overshoot a target gear range position and then reverse the electric motor... | 02/13/2007 |
| 7137312 | Gear wheels roll formed from powder metal blanks A method is disclosed for the manufacture of gear wheels having two axially adjacent gears (4,6) thereon. A blank is prepared with the two gears crudely formed thereon by compressing and sintering a shaped mass of substantially metal powder. The blank is then... | 11/21/2006 |
| 7117759 | Wave gear drive with wide mesh three-dimensional tooth profile A wave gear drive in which wide-area meshing of the rigid internal gear and flexible external gear is achieved, reducing stresses on the bottom rim of the gear teeth and in the vicinity of the major axis of the inner ring surfaces of the wave generator, thereby impr... | 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 |
| 7077026 | Gear tooth profile curvature A gear system which includes a pinion and mating-gear forming a gear pair with a predetermined gear ratio (mG), center distance (C), face-width (Fw), and limiting stresses. The pinion has a pinion tooth number (N1) and a first plural... | 07/18/2006 |
| 7069805 | Driving force transmission device A driving force transmission device includes a rim having a toothed outer periphery, with bottom lands being formed between respectively adjacent teeth and top lands being formed at teeth crests. Outer ribs are disposed at positions on an inner peripheral surface of... | 07/04/2006 |
| 7069804 | Gear linkage device with real time check A gear linkage device with real time check. The gear linkage device with real time check includes a first gear link and a second gear link. The first gear link includes a flange provided with a notch and a plurality of first toothed portions on the lateral surface t... | 07/04/2006 |
| 7059211 | Rack-and-pinion gear mechanism A rack and pinion gear mechanism includes a rack forming member having a rack; a pinion gear which engages releasably with the rack of rack forming member; and an elastic member which contacts with one portion of the rack forming member and deformed by an elastic de... | 06/13/2006 |
| 7036392 | Transmission system having a gear with engaging and non-engaging semi-annular sections A transmission system including a first gear comprising a first side having an engaging semi-annular section and a non-engaging semi-annular section; and a plurality of engaging gears for engaging with the engaging semi-annular section, wherein the engaging gears ar... | 05/02/2006 |
| 6955624 | Motor vehicle drivetrain having at least two CNT's and flywheels This design is for a motor vehicle drivetrain utilizing flywheel rotation to store energy during the vehicle trip, either storing energy when accellerated, or releasing energy when slowed depending on the vehicle power requirements. At the same time the engine is al... | 10/18/2005 |
| 6918181 | Gear tooth topological modification for reducing noise and vibration in transmission systems A method for improving acoustic and vibrational properties of gears includes determining the transmission errors of intermeshing gears due to stiffness variations in the gear teeth, performing Gear Tooth Topological (GTT) modifications to compensate for the errors, ... | 07/19/2005 |
| 6910451 | Valve timing control system and method of producing valve timing control system A valve timing control system has a tubular housing; a cam shaft having an external periphery formed with a drive cam; a phase variation mechanism disposed in the tubular housing, and varying a rotational phase of the sprocket portion relative to the cam shaft in ac... | 06/28/2005 |
| 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 |
| 6837123 | Non-involute gears with conformal contact Several embodiments of various non-involute gear tooth profiles incorporate relief areas formed across the area of the tooth face generally symmetrically to each side of the pitch circle of the gear. The relief area serves to preclude contact across the areas of mes... | 01/04/2005 |
| 6809279 | Spring loaded mechanical control mechanism for a circuit breaker comprising a toothed wheel cooperating with a cog wheel The spring-loaded mechanical control mechanism for a circuit-breaker in a high-voltage or medium-voltage grid comprises a toothed wheel turned by a spring from a first angular position to a second angular position, and a cog wheel co-operating with the toothed wheel... | 10/26/2004 |
| 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 |
| 6761083 | Drive device comprising an eccentric gearing The invention relates to a drive device, for driving a regulating unit. Said device has a gearing (20) mounted between a motor (10) and the regulating unit (30). The gearing (20) has at least a first gearing stage (22) which is cou... | 07/13/2004 |
| 6732606 | Polished gear surfaces An optimally finished gear has a surface roughness between approximately 5 micro-inches Ra to 10 micro-inches Ra. The reduced surface roughness, when located at the gear teeth, can reduce the maximum contact stress by more than fifty percent. Similarly, the subsurfa... | 05/11/2004 |
| 6732605 | Bevel gear A bevel gear 1 has a radius of curvature R of a fillet curve provided between a tooth flank A and a bottom land B gradually increasing from a small-diameter end D1 to a large-diameter end D2. ... | 05/11/2004 |
| 6588293 | Hollow rack shaft A hollow rack shaft is produced by forming a plate work piece and has continuous metal flow along the contour of rack teeth surface without being cut. A series of wave-like concave-convex sections is formed on the inner surface of the shaft. Thickness of ... | 07/08/2003 |
| 6571655 | Involute gear pair structure In an involute tooth profile pair structure, a pinion has a smaller pressure angle at its addendum than at its dedendum, and a pressure angle at an addendum of a gear wheel is equal to the pressure angle at the dedendum of the pinion, and a pressure angle... | 06/03/2003 |
| 6526849 | Negative deflection flexible meshing type gear device having passing tooth profile with maximized tooth height A flexible meshing type gear device includes a rigid internal gear, a flexible external gear and a wave generator, wherein the flexible external gear includes a cylindrical body and external teeth formed on the outer surface of the cylindrical body. The b... | 03/04/2003 |
| 6505493 | Support bar and method for forming a support bar A support bar of a headrest assembly or a hand brake is provided with one or more notches or indented portions. The notches or indented portions are formed in a way that inhibits the formation of additional material portions extending outwardly from the s... | 01/14/2003 |
| 6487922 | Steam turbine inlet sleeve inspection apparatus and method An inspection apparatus (40) for remote inspection of the trepan radius area (34) of the inlet sleeve (24) of a steam turbine (10). The apparatus (40) provides a sealed volume (50) between a pair of inflatable bladders (46,48) for the introduction of a li... | 12/03/2002 |
| 6470993 | Electric power steering apparatus An electronic power steering apparatus according to the present invention uses hypoid gears having a larger gear on a steering assisting motor side and a smaller gear on a pinion shaft side as a transmission device for transmitting a rotational force of t... | 10/29/2002 |
| 6442992 | Hollow rack shaft and method of manufacturing the same In a method of manufacturing a hollow rack shaft, an approximately rectangular plate having a wide rack tooth portion, is bent lengthwise into a gutter-like cross section to provide: at the central portion, a flat bottom portion on which rack teeth are fo... | 09/03/2002 |
| 6349607 | Transfer ring for continuously variable transmission A transfer ring (10) for a continously variable transmission. The transfer ring (10) includes an inner ring (12), an outer ring (18) and a spacer ring (24). The inner, outer and spacer rings are substantially coaxial with a transfer ring (10) axis. The sp... | 02/26/2002 |
| 6324931 | Straight bevel gears with improved tooth root area geometry and method for manufacturing forging die for making thereof A method for designing root area geometry of a straight bevel gear providing reduced stress concentration and increased tooth strength. Also, a method for making a forging die for manufacturing gears having improved tooth root geometry. The method include... | 12/04/2001 |
