Spiral Patents (Class 74/424.5)
  • Patent number: 8567280
    Abstract: A roller transmission and gearing mechanism with a driving body, one or more rollers, and a driven body coupled to the driven body via the rollers. The bodies define at least one pair of respective roller guide tracks thereon. The guide tracks start and terminate at respective pairs of limit surfaces. The rollers contact the guide tracks along rolling curves, and distances between points of the rolling curve on the driving body and the respective rolling curve on the driven body are different such that: for all contacting point-pairs on the rolling curves, the respective tangential planes are parallel to each other; the velocities of the contacting pairs of points are identical but have opposite signs; in the contacting points, the action lines of forces intersect the central axes of the rollers; and the lengths of the rolling curves of the driving and driven bodies are equal.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: October 29, 2013
    Inventor: Istvan Bogar
  • Publication number: 20120137656
    Abstract: A system to provide differential movement between a first surface, a second surface and a fixed surface includes a first surface movable between a first position and a second position; a second surface movable with the first surface and further movable beyond the first surface; a shaft connected to the second surface to move the second surface; and a drive unit connected to the fixed surface to drive the shaft to move the second surface relative to the first surface and to allow the shaft to move through the drive unit when the second surface is being moved by the first surface.
    Type: Application
    Filed: December 7, 2010
    Publication date: June 7, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Teddy L. Jones, Gregory T. Wallen, Kevin Gibbons, William E. Villano
  • Patent number: 8141447
    Abstract: A spiral-toothed gear wheel for a rack and pinion steering. The spiral-toothed gear wheel includes a pinion, which meshes on the power take-off side with a toothed rack, and a spiral-toothed gear, which is arranged on the pinion on the drive side in such a way that they rotate in unison, and on which a torque caused by a steering power or/and steering assist power acts. The spiral-toothed gear is designed as a built-up gear and includes a gear rim, which is arranged, relative to the axial direction of the gear or of the pinion thereof, between two flanges. The gear rim is pushed over a hub formed at one of the flanges and is fitted together with the flanges in a positive-locking manner. One of the flanges, namely, the flange having the hub for the gear rim, is made in one piece with the pinion.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: March 27, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Olaf Beutler, Waldemar Rogowski, Remt Blankenspeck, Günter Lohfink
  • Patent number: 8057352
    Abstract: A differential apparatus for a vehicle comprises a pair of output gears 3, 4, first and second pinion gear 5, 6 intermeshing with the output pinion gears, and a differential case 2 accommodating the output gears and pinion gears. The second pinion gear 6 has large and small gear portions 6A, 6B whose pitch diameters are different and whose which tooth numbers is same respectively, and a tooth crest 60 and a tooth recess 61 formed to be shared by the large and the small gear portions 6A, 6B continuously from the large gear portion 6B to the small gear portion 6A.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: November 15, 2011
    Assignee: JTEKT Corporation
    Inventor: Makoto Nishiji
  • Publication number: 20110179660
    Abstract: An exemplary probe apparatus includes a fixture, a first probe assembly, a motor, a lead screw, two guide members, a second probe, and a reduction gear unit. The first probe assembly is fixedly attached to the fixture and includes a first probe. The motor has a drive shaft attached to the fixture. The lead screw is coupled to the fixture. The two guide members are attached to the fixture and parallel to the lead screw. The second probe assembly is moveably attached to the lead screw and the at least one guide member, and includes a second probe. The reduction gear unit is coupled to the drive shaft and the lead screw to transmit power from the motor to the second probe assembly through the lead screw. The second probe assembly is configured for moving the second probe towards or away from the first probe along the two guide members.
    Type: Application
    Filed: May 21, 2010
    Publication date: July 28, 2011
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: SHEN-CHUN LI, SHOU-KUO HSU, HSIEN-CHUAN LIANG, YING-TSO LAI
  • Publication number: 20110017005
    Abstract: A ring and pinion gear set comprises a ring gear and a pinion gear. The pinion gear has a plurality of rolling elements. The ring gear has a plurality of mating grooves. The plurality of rolling elements of the pinion gear is adapted to interact with the plurality of mating grooves of the ring gear.
    Type: Application
    Filed: July 22, 2009
    Publication date: January 27, 2011
    Applicant: International Truck Intellectual Property Company, LLC
    Inventors: Jonathan D. Batdorff, James J. Korson
  • Patent number: 7827879
    Abstract: A webbed spiral bevel gear formed by cold forging includes: gear teeth formed at a peripheral surface of the gear basis to be integral therewith. Each gear tooth includes a tooth top land and a tooth bottom land both in a slanting and curved manner relative to a center axis of the gear basis. The webbed spiral bevel gear includes a web portion formed at radially outer end portions of the gear teeth to be integral therewith and closing the tooth bottom lands at the radially outer end portions of the gear teeth. The web portion is continuous with the radially outer end portions of the tooth top lands. A profile of the radially outer end portion of the tooth top land of each gear tooth has two edges extending at a slant from each other and expanding in a direction of the web portion.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: November 9, 2010
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Akinori Hoshino, Haruji Suzuki, Shusaku Kamio
  • Patent number: 7707721
    Abstract: In a method of manufacturing multiple transmission units with individually selectable gear ratios that vary from unit to unit, a gear pair having a desired transmission ratio is selected from a multiplicity of interchangeable gear pairs that includes both spiroplan gears and conventional crown gear and pinion combinations. The selected gear pair is then installed into a housing having first and second bearing sections configured to support bearings in which the shafts of the selected gear pair are rotatably mounted. The bearing sections are configured such that, for every gear pair that may be selected from among the multiplicity of gear pairs, the bearing sections support the first and second shafts in such a position and orientation that teeth of the gears engage with each other and a longitudinal axis of one of the gears of the gear pair is offset by a fixed distance from a longitudinal axis of the other.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: May 4, 2010
    Assignee: SEW-EURODRIVE GmbH & Co.
    Inventor: Hubert Leibold
  • Publication number: 20100095792
    Abstract: The engagement of gearwheels with curvilinear teeth is intended to create small-sized mechanical gears of rotational motion with big gear ratio in one stage. The smaller gearwheel—pinion (16)—has one tooth, having in its face section the shape of circumference (3), eccentrically shifted with respect to the axis OO1 of the gearwheel (16). The curvilinear helical tooth of the gearwheel (16) (helical eccentric) is generated by sequential shifting of the circumference 3 along the axis OO1 and its continuous turning around the axis. The greater gearwheel (17) has helical teeth, generated by turning of the cycloidal curve (5), the teeth are conjugated with the helical surface of the pinion (16). The engagement has a continuous line of contact along the whole length of the tooth, where in each section a circular pin tooth and a cycloid are engaged, having minimum losses for friction. In order to eliminate axial loads, occurring in engagement of helical teeth, the gearwheels (16) and (17) are made herring-bone.
    Type: Application
    Filed: December 22, 2009
    Publication date: April 22, 2010
    Applicant: CLOSED JOINT STOCK COMPANY "TECHNOLOGY MARKET"
    Inventors: Viktor V. Stanovskoy, Sergey M. Kazakyavichyus, Tatiana A. Remneva, Vladimir M. Kuznetsov
  • Patent number: 7694599
    Abstract: A gear mechanism includes a rotating input element, a rotating output element, and at least one first force transmission device arranged along a spiral line on a face of the input element. A second force transmission device is arranged along an encircling line on a face of the output element. The interaction of these force transmission devices transmits a turning moment from the input element to the output element, whereby this turning moment effects a rotating motion in the output element so that the rotational speed is lower than the rotational speed of the input element. A rotary encoder may be equipped with a gear mechanism of the aforementioned type.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: April 13, 2010
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventors: Alois Brandl, Johann Mitterreiter, Michael Schwabe
  • Publication number: 20100061839
    Abstract: A shaft coupling arrangement and a corresponding method for coupling shafts are disclosed herein. The shaft coupling arrangement includes an input shaft operable to rotate about a first axis. The shaft coupling arrangement also includes an output shaft operable to rotate about a second axis. The shaft coupling arrangement also includes a gearing arrangement operable to engage the input and output shafts together for rotation in the same angular direction at different angular speeds. In one embodiment of the invention, the gearing arrangement includes a plurality of nested bevel gears. In another embodiment of the invention, the gearing arrangement can include a single layshaft.
    Type: Application
    Filed: September 5, 2008
    Publication date: March 11, 2010
    Inventors: MARK E. BARTOLOMEO, Gregory Blake, Randal L. Renback, Tony R. McKenny
  • Publication number: 20100005915
    Abstract: The invention relates to a geared, irreversible motion transmitting device comprising a massive casing supporting an input means and an output means, one end of the input means being fitted with a pinion whereas one end of the output means is fitted with a gear wheel, said pinion and said gear wheel constituting a gear system. Said gearwheel and pinion are designed in a manner that, in operation, pinion rotation generates an effective force acting a distance off the center (C2) of the gear wheel, thereby implementing a corresponding gear wheel rotation, whereas gear wheel rotation generates an effective force (F?2) acting near the pinion center in a way to avert generating a corresponding pinion rotation.
    Type: Application
    Filed: February 5, 2008
    Publication date: January 14, 2010
    Applicant: ITW SMPI
    Inventors: Ghaffar Kazkaz, Didier Richard
  • Patent number: 7640778
    Abstract: A servo drive system of a press machine includes a ram, an operation shaft which vertically moves the ram, and a servo motor which operates as a power source of the ram and which generates ram pressure using a torque based on at least one speed-torque characteristic of the servo motor. The operation shaft is directly driven using the servo motor. The at least one speed-torque characteristic of the servo motor is set in a manner such that a motor torque of the servo motor at which a capacity of electric energy supplied by a servo amplifier is determined becomes the motor torque at which an optimal punching pattern of the ram is generated from a light load to a heavy load according to a type of workpiece to be worked by the press machine.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: January 5, 2010
    Assignee: Amada Company, Limited
    Inventors: Kinshiro Naito, Tokuzo Sekiyama, Toshiaki Otake, Haruhiko Kuriyama
  • Publication number: 20090283062
    Abstract: A CVVL system including a self-locking helical gear pair with, optionally, a transmission to increase output torque of the actuator. The self-locking helical gear pair provides high forward efficiency and a fully mechanically self-locking feature. The actuator therefore requires a smaller motor to perform the same actuation as a prior art worm-gear system. The CVVL system comprises two helical gears having a radial pressure angle {acute over (?)} between 45° and 75° and a helix angle ? between 60° and 80°. An asymmetric tooth profile is presently preferred, reducing contact stress and permitting higher torque density. Preferably, the helical gears are discontinuous and comprise laminated spur gear slices and hence are less costly to produce than continuous helical gears. Configurations are possible within the scope of the present invention include a single stage gear system; a multiple stage gear system; a planetary gear system; and an internal or external gear system.
    Type: Application
    Filed: May 14, 2008
    Publication date: November 19, 2009
    Inventor: Elias Taye
  • Publication number: 20090282939
    Abstract: A spiral-toothed gear is provided with a toothed ring (2) formed by extrusion coating a basic body (1) with a plastic. The spiral-toothed gear provides a connection between the basic body (1) and the toothed ring (2), whose strength makes possible the transmission of high torques in a reliable manner. The basic body (1) of the spiral-toothed gear has a flange with a disk-shaped area (1?) that is extrusion coated with the plastic toothed ring (2). The area (1?) of reduced diameter adjoining area (1?) forms a hub for mounting the spiral-toothed gear on a shaft in such a way that it rotates in unison. The area (1?) of the flange has, axially on both sides, a plurality of recesses (3, 3?) each, which are arranged distributed on its circumference, extend primarily in the axial direction but do not pass through area (1?).
    Type: Application
    Filed: June 12, 2007
    Publication date: November 19, 2009
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Waldemar Rogowski, Remt Blankenspeck
  • Publication number: 20090241711
    Abstract: A method of manufacturing a helical gear, includes a gear cutting process for forming a roughly-processed gear by applying a gear cutting to an outer circumferential surface of a blank, and a tooth surface forming process for forming a tooth surface by pressing a rolling die against a roughly-processed tooth surface of the roughly-processed gear, wherein a length of a portion of the roughly-processed tooth surface, to which a plastic deformation is applied by the rolling die, in a face width direction is formed to be shorter than a length of a face width of the roughly-processed tooth surface.
    Type: Application
    Filed: March 27, 2009
    Publication date: October 1, 2009
    Applicants: AISIN AI CO., LTD, TOYOTA JIDOSHA KABUSHIK KAISHA
    Inventors: Shinji Kitaoka, Keisuke Atsumi, Koji Takaira, Seiji Hiroshima, Takaaki Shimizu
  • Patent number: 7552662
    Abstract: Within the systems used to transmit power and or movement between two shafts, toothed wheels can be used. Also, pairs of screws with their complementary threads engaged can be used. A geometry is described for the thread profiles, for screws used in the transmission of power and or movement between two shafts. That geometry enables the threads to have the widest possible contact. The shafts can be in any relative position: parallel, perpendicular, neither coplanar nor perpendicular, coplanar or not.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: June 30, 2009
    Inventor: Miguel Alejandro Pardo
  • Patent number: 7475584
    Abstract: A servo drive system of a press machine has a pair of servo motors which can generate necessary ram pressure by compositing and using a torque based on the same speed-torque characteristics. The servo motors are symmetric with each other in a mirror image manner. The servo motors are opposed to each other at opposite ends of an operation shaft which vertically moves a ram. The servo motors are integrally operated, thereby directly driving the operation shaft.
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: January 13, 2009
    Assignee: Amada Company, Limited
    Inventors: Kinshiro Naito, Tokuzo Sekiyama, Toshiaki Otake, Haruhiko Kuriyama
  • Patent number: 7472619
    Abstract: A gear unit includes a housing, two shafts arranged parallel with one another and each supporting a helically cut toothed gear, and two pairs of bearings supported by or relative to the housing in an arrangement in which each pair of bearings rotatably supports a shaft with the toothed gears of the two shafts being rotatable one relative to the other in mutual engagement. Two bearings of the two shafts lying to a common side of the inter-engaged helical gears are supported by a substantially common wall section of the gear unit housing, one of the two bearings being arranged to transmit to the housing wall section axial forces acting in a direction from the gears to the bearing and the other bearing being arranged to transmit to the wall section axial forces acting in a direction from the other bearing to the gears.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: January 6, 2009
    Assignee: Hansen Transmissions International NV
    Inventor: Dirk-Olaf Leimann
  • Patent number: 7464620
    Abstract: An actuator for an automotive seat that includes two main assemblies: (1) a motor assembly; and (2) a gearbox assembly. The gearbox assembly includes multiple stages of gear reduction and a dividing plate. In some embodiments, the gearbox assembly has a single-lead worm, a worm gear with a right-hand helix tooth direction, and a worm gear with a left-hand helix tooth direction. The worm gears are driven by the single-lead worm. The single-lead worm has two ends, one end has a right-hand tooth helix direction, and the other end has a left hand helix direction.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: December 16, 2008
    Assignee: Schukraoof North America
    Inventors: Zhihang Li, Saili Li, Liming Tang, Xu Du
  • Patent number: 7421922
    Abstract: A device for linearly moving a useful mass is described. Typically, when a large useful mass is moved, relatively large forces are transferred by a spindle or a toothed rack to the corresponding machine or machine frame. These forces can be compensated by moving a compensating mass in the opposite direction of the useful mass.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: September 9, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jens Hamann, Elmar Schäfers, Bernd Wedel
  • Publication number: 20080210037
    Abstract: A helical gear having helical tooth portions of the helical gear being worked by a punch and a die having a land of a smaller distance between opposed working surfaces formed to be inclined than that of other portion, formed on predetermined portions in tooth directions of respective opposed working surfaces thereon, in which worked surfaces on both side of the helical tooth portions on the helical gear as a work are ironed by the land in response to the helical tooth portions passing through the land when the work is forged by the punch.
    Type: Application
    Filed: December 27, 2007
    Publication date: September 4, 2008
    Applicant: O-OKA CORPORATION
    Inventors: Mitsushige O-Oka, Yoshiki Kawasaki, Mitsuhiko Shimomura
  • Publication number: 20080172877
    Abstract: In a method of manufacturing multiple transmission units with individually selectable gear ratios that vary from unit to unit, a gear pair having a desired transmission ratio is selected from a multiplicity of interchangeable gear pairs that includes both spiroplan gears and conventional crown gear and pinion combinations. The selected gear pair is then installed into a housing having first and second bearing sections configured to support bearings in which the shafts of the selected gear pair are rotatably mounted. The bearing sections are configured such that, for every gear pair that may be selected from among the multiplicity of gear pairs, the bearing sections support the first and second shafts in such a position and orientation that teeth of the gears engage with each other and a longitudinal axis of one of the gears of the gear pair is offset by a fixed distance from a longitudinal axis of the other.
    Type: Application
    Filed: March 27, 2008
    Publication date: July 24, 2008
    Applicant: SEW-EURODRIVE GmbH & Co.
    Inventor: Hubert LEIBOLD
  • Patent number: 7346992
    Abstract: A hand-held power tool (2) includes an angle drive (20) for connecting the motor-driven driving shaft (6) and the driven shaft (10) connected with a tooth holder (24) for joint rotation therewith, and having drive toothing (14) provided on the drive shaft (6) and driven toothing (16) provided on the driven shaft and cooperating with the drive toothing (14) for driving the driven shaft (10) in the driven direction (DAb) in response to the drive shaft (6) being driven in the drive direction (DAn), with the driven toothing (16) being inclined over its circumference (36) in a direction opposite the driven direction (DAb), and with the driven shaft (10) having an axial stop (30) for limiting an axial displacement backlash of the drive shaft (6) relative to the driven shaft (10).
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: March 25, 2008
    Assignee: Hilti Aktiengesellschaft
    Inventor: Josef Hunger
  • Publication number: 20080022798
    Abstract: A running gear toothing for gearwheels and a process for producing such running gear is provided. In order to be able to work complex shapes (e.g. reinforcing ribs) into running gear, a preforged or precast gearwheels are produced oversized, and are then finished using an electrochemical erosion process. The invention eliminates complex machining operations and permits gear teeth finishing in highly spaced-constrained applications, thereby eliminating the need for production and assembly complex multi-component gears.
    Type: Application
    Filed: November 23, 2004
    Publication date: January 31, 2008
    Applicant: DamilerChrysler AG
    Inventor: Dirk Zeise
  • Patent number: 6991573
    Abstract: A steering actuator of an independent type steer-by-wire system comprises a housing fixed to a vehicle body and an ultrasonic motor. The ultrasonic motor has a stator internally fixed to the housing and a rotator rotating relative to the stator when an electric current is applied. A steering rod having a first end and a second end penetrates through a center portion of the ultrasonic motor. The first end of the steering rod extends out of the housing for connection to a tie rod. In one embodiment, a ring gear, planetary gears, sun gear and/or racks formed at the steering rod are operably associated with converting rotating movement of the ultrasonic motor into linear movement of the steering rod. In another embodiment, a rotator ring, a plurality of pinions, worm gears and a plurality of racks formed at the steering rod are operably associated with converting rotating movement of the ultrasonic motor into linear movement of the steering rod.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: January 31, 2006
    Assignee: Hyundai Motor Company
    Inventor: Jung-Rak Yun
  • Publication number: 20040040398
    Abstract: Within the systems used to transmit power and or movement between two shafts, toothed wheels can be used. Also, pairs of screws with their complementary threads engaged can be used.
    Type: Application
    Filed: August 18, 2003
    Publication date: March 4, 2004
    Inventor: Miguel Alejandro Pardo
  • Patent number: 6609440
    Abstract: A structure of a variable transmission device includes an input shaft driven by a motor to perform alternate rotation having a gear on a middle portion, an output shaft having a pair of gears secured to the upper and lower ends respectively and a speed changing shaft positioned between the input and output shaft having a pair of gears rotatably secured to two ends respectively meshed with the gears of the output shaft and a spiral outer periphery on a middle portion rotatably and slidably engaged with an inner threaded gear which meshes with the teeth of the gear of the input shaft. Thereby, the rotation of the input shaft drives the inner threaded gear to rotatably slide about the spiral outer periphery to force the gears of the speed changing shaft to rotate and in turn to drive the gears of the output shaft to rotate in concert with the input shaft.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: August 26, 2003
    Inventor: Chu-Wen Chu
  • Publication number: 20030047018
    Abstract: The invention relates to a modular transmission system, comprising in at least one transmission stage with a housing a plurality of transmissions with different multiplications, each having a first transmission step comprising an annular gear with a pinion offset, said pinion off-set being identical for all transmissions of one transmission stage. The modular transmission system is provided with at least one first pinion of the angular gear with a first serrated crown gear in a crown gear serration and a second pinion with a second crown gear in a spiroplan gearing.
    Type: Application
    Filed: September 17, 2002
    Publication date: March 13, 2003
    Inventor: Hubert Leibold
  • Publication number: 20020148313
    Abstract: A displacement unit for at least one element to be displaced is provided comprising a drive unit, a transfer element that is caused to move by the drive unit and that comprises a thread or a tooth set, and an engagement element, which engages into the thread or tooth set of the transfer element and is thus driven by the motion of the transfer element, and by whose motion the displaced element is moved. The engagement element is configured elastically, in such a way that it deforms elastically upon contact by the displaced element against a stop or obstacle.
    Type: Application
    Filed: March 15, 2002
    Publication date: October 17, 2002
    Applicant: LEICA MICROSYSTEMS WETZLAR GmbH
    Inventors: Karl-Josef Schalz, Norbert Gaul
  • Publication number: 20020104398
    Abstract: A fail-safe ball screw assembly has a double-start screw and a corresponding nut. The screw has a first helix with a truncated, smaller diameter flat and an intertwined second helix with an extended, larger diameter flat. Similarly, the corresponding nut has a first helix with an extended, larger diameter flat and an intertwined second helix with a truncated, smaller diameter flat. When the screw is inserted with the nut, the screw's truncated first helix is paired with the nut's extended first helix, and the screw's extended second helix is paired with the nut's truncated second helix. The nut and screw helixes combine to form channels in which bearings balls travel. The bearings allow the fail-safe ball screw assembly to operate with high efficiency and precision, while the overlapping structure of the helixes prevents catastrophic failure caused by the removal or loss of the bearing balls.
    Type: Application
    Filed: February 2, 2001
    Publication date: August 8, 2002
    Inventor: John T. Pawlak