Guide Roll Mounted For Movement Of Its Axis Along Arcuate Path To Tension Belt Patents (Class 474/133)
  • Patent number: 10309531
    Abstract: A vehicle includes a continuously-variable transmission (CVT) that is supplied with power from an input. The CVT also includes a pair of pulleys, at least one of which having a variator that is configured to translate linearly along an axis of the input. A mechanical lock is configured to selectively lock the input with the variator such that the input and the variator rotate in unison. This allows the hydraulic pressure supplied to the CVT to reduce while the variator and the input remain locked.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: June 4, 2019
    Assignee: Ford Global Technologies, LLC
    Inventor: James Trent
  • Patent number: 10180179
    Abstract: A tension control mechanism includes a drive wheel and a jack wheel rotatably mounted with respect to a chassis of a self-propelled power tool. An idler arm is pivotally mounted to the chassis and carries an idler wheel. A flexible drive member entrains the drive wheel and the jack wheel and drives the idler wheel. First and second bias members bias the idler arm in opposing rotational directions, which move the idler wheel toward or away from the flexible drive member to respectively increase or decrease tension. A ratchet arm is attached to the idler arm has a hook. A ratchet head is fixed to the chassis and has ratchet teeth for engaging the hook to permit relative motion between the hook and the ratchet teeth to increase tension, and to limit relative motion between the hook and the ratchet teeth to prevent an excessive decrease in tension.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: January 15, 2019
    Assignee: Schiller Grounds Care, Inc.
    Inventor: Jonathan Lapp
  • Patent number: 9982760
    Abstract: A tensioner includes a base, a tension arrangement rotatable at the base, a damping member being rotated in a loading direction by the tension arrangement, and an elastic member biasing against the damping member. The position of the damping member depends by the layout geometry of the specific application and is directly in opposition to the hub load. The reaction force of the cylindrical surface of the base on the damping member is very near to the plan of the external forces represented by the hub load to minimize the deflection of the shaft. The tension arrangement is rotated to push the damping member for generating a first positive tension between the damping member and the base, and to expand the elastic member radially for generating a second positive tension between the elastic member and the damping member, so as to enhance a damping force of the tensioner.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 29, 2018
    Assignee: Ningbo Fengmao Far-East Rubber Co., Ltd.
    Inventors: Chunlei Jiang, Ke Yang
  • Patent number: 9863512
    Abstract: A continuously variable transmission belt guide is mounted next to a driven clutch assembly and in close proximity with the CVT belt at the CVT's lowest drive ratio. The CVT belt connects between a pair of moveable sheaves of the drive and driven clutch assemblies to provide a variable CVT drive ratio between a lowest drive ratio and a highest drive ratio. When contacting the CVT belt, the CVT belt guide prevents a ripple or wave from appearing in the un-tensioned side of the belt, prevents the CVT belt from losing contact with the driven clutch, and prevents undesirable vehicle performance at the lowest drive ratio.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: January 9, 2018
    Assignee: Deere & Company
    Inventors: Nathan Yolitz, Stephan R. Hayden
  • Patent number: 9829081
    Abstract: A tensioner includes a base, a tension arrangement rotatable at the base, a damping member being rotated in a loading direction by the tension arrangement, and an elastic member biasing against the damping member. The position of the damping member depends by the layout geometry of the specific application and is directly in opposition to the hub load. The reaction force of the cylindrical surface of the base on the damping member is very near to the plan of the external forces represented by the hub load to minimize the deflection of the shaft. The tension arrangement is rotated to push the damping member for generating a first positive tension between the damping member and the base, and to expand the elastic member radially for generating a second positive tension between the elastic member and the damping member, so as to enhance a damping force of the tensioner.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: November 28, 2017
    Assignee: Ningbo Fengmao Far-East Rubber Co., Ltd
    Inventors: Chunlei Jiang, Ke Yang
  • Patent number: 9730383
    Abstract: A yard maintenance device having a working assembly selectively rotatable based on operation of an engine of the device may include a belt drive system. The belt drive system may include at least one driven pulley operably coupled to the working assembly, a drive shaft operably coupled to the engine, a drive belt configured to selectively couple the drive shaft to the at least one driven pulley, a tension adjustment assembly, and a control unit. The tension adjustment assembly may be configured to operably couple to at least one component of the belt drive system to adjust a position thereof to modify tension of the drive belt. The control unit may be configured to provide electronic control of the tension adjustment assembly.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 15, 2017
    Assignee: HUSQVARNA AB
    Inventors: Douglas Greulich, Matthew Albinger, Sean Dwyer
  • Patent number: 9458915
    Abstract: A belt assembly for internal combustion engine that has a tensioner mount is described. The belt assembly includes a spacer that is rotatably coupleable to the tensioner mount, and a tensioner that is co-rotatably coupled to the spacer. The spacer is positioned between the tensioner and the tension mount.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: October 4, 2016
    Assignee: CUMMINS IP, INC.
    Inventors: Eric Benz, Paul H. Anderson, Carl M. Carpenter
  • Patent number: 9297445
    Abstract: Methods and systems are provided for controlling an engine drive belt tensioner system in which the engine is controlled by an engine stop-start system. When the engine stop-start system decides to stop the engine, the engine drive belt tensioner system is operated so as to increase the tension in a respective drive belt to a high level during the engine stop process. This reduces the time taken for the engine to stop and will tend to reduce any tendency for reverse rotation of the engine at the end of the stop phase.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: March 29, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Donatus Andreas Josephine Kees, Anthemios Philemon Petridis
  • Patent number: 9227335
    Abstract: A tubular film cutting arrangement for cutting tubular shrink film into sleeves of suitable length for application to containers includes a support member having a film passage opening therein; a plurality of knife drive pulleys rotatably mounted to the support member and spaced apart around the film passage opening, each knife drive pulley having a knife member mounted thereon for rotation with the knife drive pulley; a plurality of idler rollers rotatably mounted to the support member, each idler roller arranged between two of the knife drive pulleys, wherein a drive belt path is formed between the knife drive pulleys and the idler rollers; and a drive belt extending along the drive belt path such that a first side of the drive belt is in contact with each of the knife drive pulleys and a second side of the drive belt is in contact with each of the idler rollers; wherein the idler rollers are positioned to interact with the second side of the drive belt in order to hold the first side of the drive belt in c
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: January 5, 2016
    Assignee: Axon LLC
    Inventor: Adam W. Duncan
  • Patent number: 9175449
    Abstract: A transmission system is provided for transmitting power from an engine to a milling rotor in a cold planer. The transmission system includes a first circuit, a second circuit, and a shaft. The first circuit is disposed in a first plane and configured to be operatively driven by the engine. The second circuit is disposed in a second plane substantially parallel to the first plane and configured to operatively drive the milling rotor. The shaft couples the first circuit to the second circuit wherein the engine and the milling rotor are axially offset.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 3, 2015
    Assignee: Caterpillar Paving Products Inc.
    Inventors: Benjamin Thomas Schafer, Jason Robert Bjorge
  • Patent number: 9017196
    Abstract: A drive arrangement (10) has first and second wheels (12, 14) and an endless loop member (16). The path of the member (16) is defined in part by a third wheel (18), between the wheels (12, 14). The wheel (18) is movably mounted so that the length can be changed for the path of the member (16) as it passes around the wheel (18), between the wheels (12, -14). Accordingly, the member (16) can be tightened or slackened around the wheels (12, 14), so that the wheels (12, 14) can be coupled to convey drive from one to the other, through the member (16), or disengaged, so that drive is not conveyed.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: April 28, 2015
    Inventor: Bruce Stanley Gunton
  • Patent number: 9005061
    Abstract: A clamping device (1) of a traction mechanism drive, comprising a fixedly positioned base part (2), with which a pivot arm (3) is associated. The pivot arm (3) can be pivoted via a rotary bearing, consisting of a hub (9), a pin (5) of the base part (2) and a sliding bearing (10). A spring means (12) inserted between the base part (2) and the pivot arm (3) exerts an expansion force and effects a non-positive support of a tensioning roller (11) that is connected to the pivot arm (3) on a traction mechanism. In order to damp adjusting movements of the pivot arm (3), a damping device (13) is provided, which comprises two separate spring-loaded friction elements. For this purpose, a friction disk (14) is supported with form fit on the supporting disk (8) connected to the pin (5) of the base part (2) and with friction fit on the pivot arm (3).
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: April 14, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Thorsten Liebel, Bernd Hartmann
  • Publication number: 20150050051
    Abstract: A drive unit includes a drive pulley connected to a drive source, a driven pulley connected to a target to be moved, at least one relay pulley for transmitting power from the drive pulley to the driven pulley, a plurality of belts including a first belt entrained around the drive pulley and the relay pulley, and a second belt entrained around the relay pulley and the driven pulley, a first tension application device, and a second tension application device. The first tension application device contacts the first belt to provide tension thereto. The second tension application device contacts the second belt to provide tension thereto. A cyclic speed variation component of the first belt in one rotation period transmitted to the driven pulley via the relay pulley and a speed variation component of the second belt in one rotation period transmitted to the driven pulley counteract each other.
    Type: Application
    Filed: October 31, 2014
    Publication date: February 19, 2015
    Applicant: Ricoh Company, Ltd.
    Inventors: Masahiro ISHIDA, Shinya SHIMIZU
  • Patent number: 8888627
    Abstract: A tensioner for a power transmitting element in a drive system is disclosed. The tensioner comprises a threaded shaft that includes threading and at least one non-threaded end and defines a pivot axis, an arm rotatable about the pivot axis on the non-threaded end of the threaded shaft, a torsion element biasing the arm to rotate about the pivot axis, a threaded nut threadedly connected to the threaded shaft. The threaded nut has a first surface in frictional engagement with the arm and is rotatable about the threading. The threaded nut acts as a one-way limited slip clutch to provide asymmetric damping to the arm and controlled resisting torque in a variable relative proportion compared to the mean torque and returning torque.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: November 18, 2014
    Assignee: Dayco IP Holdings, LLC
    Inventor: Robert J. Crist
  • Patent number: 8888626
    Abstract: According to aspects illustrated herein, there are provided methods and systems for applying continuous tension on a belt/cable system. The automatic tensioning system includes a pivot mechanism and a locking mechanism. The pivot mechanism includes a pivot arm extending between an idler pulley and a pivot point. The idler pulley is mateable with a belt/cable. The belt/cable is routed about the idler pulley. The idler pulley rotates by the movement of the belt/cable, and the pivot arm pivots in an opposing direction from the belt/cable at the pivot point to apply continuous tension to the belt/cable as the pivot arm pivots. The locking mechanism is in communication with the pivot arm to secure the pivot arm in position, and the locking mechanism is adjustable.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: November 18, 2014
    Assignee: Xerox Corporation
    Inventors: Joannes N. M. deJong, Lloyd A. Williams, Matthew Dondiego
  • Publication number: 20140287858
    Abstract: The present invention discloses a tensioner which comprises: a base; a swing arm mounted on the base, rotating about a first central axis with respect to the base; an elastic element positioned between the base and the swing arm, which is used for biasing the swing arm to rotate with respect to the base; a frictional device which is located between the elastic; element and the base or the swing arm, for buffering the relative movement between the swing arm and the base, wherein the elastic element exerts along the radial direction a first pressure on the frictional device such that a first frictional force is produced between the frictional device and the base or the swing arm, and the tensioner further comprises a supporting bock which exerts along the radial direction a second pressure on the frictional device such that a second frictional force is produced between the frictional device and the base or the swing arm.
    Type: Application
    Filed: October 25, 2012
    Publication date: September 25, 2014
    Inventors: Minchun Hao, Hongliang Fu, Yuhong Zhang
  • Patent number: 8690718
    Abstract: A tightener for a belt drive cooperates with the belt in the presence of oil, and has a pin with a first axis; a base plate integral with and substantially perpendicular to the pin; a cam arm connected in a rotary manner to the pin and movable with respect to the base plate; a contact member carried by the cam arm; and an elastic member connected to the cam arm to activate the contact member against the belt. The tightener also has a friction member made of oil-resistant material and axially supporting the cam arm on the base plate; and axial elastic means for loading the friction member against the base plate.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: April 8, 2014
    Assignee: Dayco Europe S.r.l. con Unico Socio
    Inventor: Michele Cantatore
  • Publication number: 20140045631
    Abstract: A cam actuated hydraulic brake system and an in plane tensioner pulley belt drive system may be used on autonomous vehicles, such as dynamic motion elements for the evaluation of various crash avoidance technologies. The brake system utilizes a cam driven by a servo to push the piston push rod of a hydraulic master brake cylinder, thus distributing pressurized brake fluid throughout the brake system. The pulley drive system uses an articulating arm for the driven pulley, and that arm may also have connected to it one or two tension pulleys, each of which is in contact with the belt. Because the drive pulley and the tensioner pulleys pivot about the same pivot axis, the needed belt length remains nearly constant across the entire range of the articulating arm.
    Type: Application
    Filed: October 9, 2013
    Publication date: February 13, 2014
    Applicant: Dynamic Research Inc.
    Inventors: Joseph Kelly, Peter Broen, Jordan Silberling, John Zellner
  • Patent number: 8613680
    Abstract: A tensioner having a closing-type torsion spring that is employed to bias a pivot arm about a pivot shaft. The tensioner includes a damper that continuously contacts an inside surface of the torsion spring to dampen torsional vibration transmitted through the torsion spring.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: December 24, 2013
    Assignee: Litens Automotive Partnership
    Inventors: Marek Frankowski, Liviu Tanjala, Jacek Stepniak, Frank Schimpl
  • Patent number: 8602930
    Abstract: A drive belt tensioner assembly for a motor-generator unit is comprises a motor-generator unit having a rotatable drive pulley, configured to engage a drive belt, extending therefrom. A drive belt assembly housing is fixed to the motor-generator unit and has an inner surface defining an opening through which the rotatable drive pulley of the motor-generator unit extends. A tensioner mounting ring is mounted to, and rotatable with respect to, the drive belt assembly housing. A tensioner pulley is mounted for rotation on the tensioner mounting ring and is configured to engage the drive belt on a side of the motor-generator unit drive pulley. A biasing assembly having a first end mounted to the tensioner mounting ring and a second end mounted in a fixed relationship to the motor-generator unit exerts a biasing force on the tensioner mounting ring to rotate the ring and the tensioner pulley against the drive belt.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: December 10, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: William C. Deneszczuk, Joel M. Maguire
  • Patent number: 8562466
    Abstract: A novel tensioner for use with flexible drives, such as serpentine accessory belts on automobiles includes a tensioner arm to spindle pivot design which employs a frustoconical bushing between an inner pivot surface of the tensioner arm and a spindle shaft. The frustoconical design of the bushing resists off axis movement of the tensioner arm and a wear take up mechanism biases the bushing into contact with the inner pivot surface to compensate for normal wear of the bushing and/or pivot surface. A thrust plate is mounted to the end of the spindle shaft and rides in a thrust washer, the thrust plate and thrust washer being held captive in the tensioner arm such that the tensioner arm can pivot about the bushing and the spindle and the thrust plate and thrust washer assist in inhibiting off-axis movement of the tensioner arm. In one embodiment, the biasing force which biases the bushing against the inner pivot surface of the tensioner arm can be varied to change the amount of dampening of the tensioner.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: October 22, 2013
    Assignee: Litens Automotive Partnership
    Inventors: Hubertus G. Mevissen, James W. Dell
  • Patent number: 8545352
    Abstract: A tensioner may be part of a power system to tension an endless power transmitting element. The tensioner includes an arm having an arm arbor with a slot therethrough that is rotatable about a first axis, a bushing having a sleeve that includes a cut-out and a removable sleeve-segment that has a protrusion thereon, the sleeve-segment being receivable in the cut-out with the protrusion in the slot, and a spring coupled to the arm for rotation of the arm about the first axis into tensioning engagement with a power transmitting element. The spring is positioned where it can radially expand into contact with the protrusion of the bushing, at least the protrusion on the sleeve-segment, as the arm is rotated in a direction opposite the direction of tensioning engagement such that the bushing is urged radially outward relative to the arm arbor to provide frictional damping.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: October 1, 2013
    Assignee: Dayco IP Holdings, LLC
    Inventors: Anthony E. Lannutti, Robert J. Crist, James Kevin Lindstrom
  • Patent number: 8545351
    Abstract: “BELT TENSIONER WITH HIGH DAMPING RUBBER DEVICE”, the present invention refers to the technical field of belt tensioners in general, more specifically a belt tensioner (1) with high damping and with a rubber device (2), designed to generate higher rigidity and high damping to belts in combustion engines. The object of the tensioner is to reduce manufacturing costs, wearing and noise, both of the tensioner itself and the belt.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: October 1, 2013
    Inventors: Marcelo Peregrina Gomez, Maicon Pessoa
  • Publication number: 20130225341
    Abstract: The invention relates to a tensioning device comprising a back plate, on which is installed a tensioning roller provided with at least one bearing. The tensioning roller is installed on the back plate with the possibility of rotation about an eccentric axis (X6) in relation to the axis (X4) of the tensioning roller. The tensioning roller is provided with a protuberance engaged in a peripheral recess of the back plate, this peripheral recess limiting the movement of the protuberance between two abutments.
    Type: Application
    Filed: February 21, 2013
    Publication date: August 29, 2013
    Inventors: Romuald Lescorail, Nicolas Tronquoy
  • Patent number: 8517873
    Abstract: A tensioning device for a traction mechanism drive for a belt drive that is incorporated in an internal combustion engine, in order to drive components of the engine or installed accessories. The tensioning device has a construction that is advantageous under production and construction viewpoints, by a high degree of robustness, and also by an advantageous mechanical operating behavior. The tensioning device includes a base part, a swivel arm, a torsion spring with a first winding end section that is allocated to the swivel arm and a second winding section that is allocated to the base part for applying a pivoting moment acting between the base part and the swivel arm and forcing the swivel arm in a tensioning direction, and a damping device for generating a damping force that counteracts a pivoting of the swivel arm directed against the tensioning direction.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: August 27, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Thorsten Liebel, Fred G. Seebeck, Scott Thompson
  • Publication number: 20130217525
    Abstract: A tensioning system including a body having a base and an engagement surface pivotally coupled to the base. The system further includes a biasing mechanism operatively coupled to the engagement surface to bias the engagement surface relative to the base, and a locating device coupled to the body. The locating device is configured to rotationally position the tensioning system, and the locating device has an adjustable effective length.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 22, 2013
    Applicant: DAYCO PRODUCTS, LLC
    Inventors: Robert James Crist, Kevin Gerard Dutil, Anthony Eugene Lannutti, James Kevin Lindstrom, Jeffrey Allen Pendergrass
  • Patent number: 8512183
    Abstract: A belt assembly and adjustment mechanism for a belt drive system including a belt. The belt assembly and adjustment mechanism includes a first bracket that is attachable to a first portion of the belt drive system, and a second bracket that is attachable to a second portion of the belt drive system. The second portion is different from the first portion. The mechanism also includes a belt drive system component that is positioned between the first bracket and the second bracket. The component is pivotally coupled to the first bracket on one side of the component and is pivotally coupled to the second bracket on another side of the component. The component is further slidably coupled to one of the first bracket and the second bracket such that the component is movable between a first orientation at which the belt is configured to be tensioned and a second orientation at which the belt is configured to be installed on the component.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: August 20, 2013
    Assignee: Thermo King Corporation
    Inventor: Brendan H. Geraghty
  • Publication number: 20130172137
    Abstract: In one aspect, the invention relates to a tensioner that is capable of precognitively anticipating when it is desirable to increase the tension in a belt or other endless drive element so as to prevent belt slip prior to events that would raise the risk of it.
    Type: Application
    Filed: September 12, 2011
    Publication date: July 4, 2013
    Applicant: LITENS AUTOMOTIVE PARTNERSHIP
    Inventors: John R. Antchak, Gary J. Spicer, Warren Williams, Zbyslaw Staniewicz, Andrew M. Boyes, Gerald J. Hamers, Ron Farewell
  • Patent number: 8460140
    Abstract: A belt tensioner includes a support housing at least in part defining a spring cavity and an arm pivotally attached to the support housing. A spring is located in the spring cavity and is operatively connected to the arm and the support housing to bias the arm about a pivot axis toward an unloaded position relative to the support housing. A damping member includes a hub and deflectable, force-applying elements that are connected to and spaced apart about a periphery of the hub. The force-applying elements are biased toward a contact surface of the arm to apply a frictional force between the contact surface and the force-applying elements to impede rotation of the arm relative to the support housing.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: June 11, 2013
    Assignee: Dayco IP Holdings, LLC
    Inventors: Robert C. Joslyn, James G. Quintus, Randy C. Foster
  • Publication number: 20130079185
    Abstract: A belt tensioning device for a belt drive having at least one apparatus with a housing, a driveshaft and a belt pulley, as well as an infinite belt for driving the belt pulley. The belt tensioning device includes a base that can be or is firmly connected to the apparatus, exactly one tensioning arm that, relative to the base, is supported so as to be pivotable around a pivot axis and that, via a torsion spring, is supported in the circumferential direction against the base. The belt tensioning device also includes a tensioning roller that, at the tensioning arm, is supported so as to be rotatable around an axis of rotation and serves to tension the belt. When the belt tensioning device is mounted at the apparatus, the pivot axis of the tensioning arm is arranged inside the outer diameter of the belt pulley of the apparatus.
    Type: Application
    Filed: September 13, 2012
    Publication date: March 28, 2013
    Applicant: MUHR UND BENDER KG
    Inventors: Stefan Schauerte, Joachim Jud, Simon Pfeifer, Manfred Jung
  • Patent number: 8403780
    Abstract: A tensioner comprising a base comprising a first portion, an arm comprising a second portion, the arm pivotally connected to the base, a pulley journalled to the arm, a resilient member compressively disposed between the first portion and the second portion, the resilient member comprising a gap within which the first portion and the second portion are disposed, and the resilient member comprising a bore, the bore engaging the arm.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: March 26, 2013
    Assignee: The Gates Corporation
    Inventors: Oliver Stegelmann, Xinjian Fan
  • Publication number: 20120279904
    Abstract: A soil plug processing mechanism for processing soil plugs which occur during ground maintenance. The soil plug processing mechanism having a separating device for picking up and processing the soil plugs by separating the soil plug material into fine particles and coarse particles. The separating device has at least one rotatable rotary sieve which has a rotatably driveable sieve drum with an outside surface which is configured at least partially as a sieve area.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 8, 2012
    Applicant: Wiedenmann GmbH
    Inventor: Thomas Pfisterer
  • Patent number: 8267821
    Abstract: A mechanical tensioner that includes a pulley arm with a tension pulley for a tension element drive of an internal combustion engine. The pulley arm is mounted to a mounting base that is fixedly attached to the engine. A spring that functions in compression and torsion is located about a pivot axis on the mounting base, with one end connected to the pulley arm and the other end attached to the mounting base. The spring provides torsion to the pulley arm to maintain tension on the tension element, and is also compressed between a mounting flange of the pulley arm and a support flange on the mounting base to transmit an axial force between the pulley arm and an outer hub that is fixed to the mounting base. A shaped bush which functions at least as a damping element, and can also function as a bearing, is located in the space between the outer hub and the pulley arm.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: September 18, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Ross Gresley
  • Patent number: 8267820
    Abstract: A bicycle chain tensioner is provided with a bracket, a tensioner arm, a securing position adjustment mechanism and a chain engaging member. The bracket has a bicycle axle mounting portion and an arm attachment portion. The tensioner arm is adjustably secured to the arm attachment portion of the bracket. The securing position adjustment mechanism selectively fixes the tensioner arm with respect to the bracket in one of a plurality of the securing positions. The chain engaging member is attached to the tensioner arm.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: September 18, 2012
    Assignee: Shimano Inc.
    Inventor: Takashi Yamamoto
  • Patent number: 8257211
    Abstract: A pulley assembly for a flexible motor vehicle transmission, comprising a supporting member rotatable about an axis, a pulley adapted to cooperate with a belt and connected to the supporting member to be rotatable about said axis with respect to the supporting member, elastic spiral means interposed between the supporting element and the pulley and comprising a sliding portion elastically loaded in radial direction against a sliding wall carried by one of either the supporting members or the pulley for tangential force drive coupling pulley to the supporting member. In particular, the elastic spiral means comprise a supporting element and sliding portion comprising at least one runner carried by the supporting element and sliding along the sliding walls.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: September 4, 2012
    Assignee: Dayco Europe S.R.L.
    Inventor: Hervé Riu
  • Patent number: 8162787
    Abstract: A new asymmetrically damped tensioner is provided utilizing a roller clutch engaged with a tensioner arm through a frictional contact. During normal operation, the roller clutch enables the tensioner arm to pivot in a first direction to take up belt slack with negligible frictional damping applied to the motion of the tensioner arm. When the tensioner arm pivots in a second direction, away from the belt, however, in a condition commonly known as wind-up, the roller clutch engages and creates a frictional linkage between the tensioner arm and a fixed surface. This frictional linkage provides asymmetric frictional damping to the tensioner to limit movement in the second direction and combat wind-up.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 24, 2012
    Assignee: Dayco Products, LLC
    Inventor: Douglas G. Gerring
  • Patent number: 8109848
    Abstract: A stable and play-free pivot connection of a bicycle derailleur between a parallelogram link and either a base member or a chain cage. The pivot points are formed with first and second bushings that are arranged as far from one another as possible. The parts are connected by pivot pins having a anti-rotation contour for preventing rotation of the pin within an inner pivot part. The axial displacement of the pivot pin is prevented by a securing element or by a deforming element engaging a holding contour on the pivot pin. One of the first and second bushings is protected and arranged in a blind hole and the other of the first and second bushings is covered on the outside by a pin head of the pivot pin.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: February 7, 2012
    Assignee: SRAM Deutschland GmbH
    Inventors: Robert Böhm, Thorsten Hamisch, Andreas Benz
  • Publication number: 20120010034
    Abstract: A traction mechanism drive, in particular for an internal combustion engine, including a vibration damper (1) having a base part (2) and a rotary part (3) that can be rotated to a limited extent relative to the base part against the effect of an energy store (6). Between the base part (2) and the rotary part (3), a friction unit (8) having a friction ring (9) formed of a support element (15) and a sliding element (16) arranged radially outside of the support element (15) for forming a friction contact in relation to a friction surface (10) is effective. The friction ring (9) is produced in one piece from the support element (15) and the sliding element (16), and the support element (15) and the sliding element (16) are cast on top of each other. A positive fit (17) is effective between said support element and sliding element in the circumferential direction.
    Type: Application
    Filed: February 17, 2010
    Publication date: January 12, 2012
    Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
    Inventors: Jurgen Gilmer, Thorsten Liebel, Gerhard Prosch, Christoph Schuster, Johann Singer, Christine Thomann
  • Publication number: 20110294614
    Abstract: A system for improving the efficiency of a belt-driven system is provided. The system is particularly adapted for retrofitting tensioners onto existing belt-driven machines or to incorporate a tensioner into an the existing design of a belt-driven machine with limited changes to the specifications of the existing design. The system includes a motor driving a belt that drives a pulley. The pulley drives a shaft or other element of the system. A tensioner is provided for tensioning the belt to impede slippage between the belt and the pulley. The tensioner is connected to the motor and a frame of the system via a mounting bracket that includes a first leg and a second leg having a plurality of mounting holes adapted to cooperate with mounts on the motor and a connector of the tensioner. In one embodiment, the mounting holes of the second leg are laterally offset from one or more mounting holes of the first leg.
    Type: Application
    Filed: June 1, 2011
    Publication date: December 1, 2011
    Inventor: Jeremy M. Bigler
  • Publication number: 20110287881
    Abstract: “BELT TENSIONER WITH HIGH DAMPING RUBBER DEVICE”, the present invention refers to the technical field of belt tensioners in general, more specifically a belt tensioner (1) with high damping and with a rubber device (2), designed to generate higher rigidity and high damping to belts in combustion engines. The object of the tensioner is to reduce manufacturing costs, wearing and noise, both of the tensioner itself and the belt.
    Type: Application
    Filed: February 22, 2011
    Publication date: November 24, 2011
    Applicant: ZEN S.A INDUSTRIA METALURGICA
    Inventors: MARCELO PEREGRINA GOMEZ, MAICON PESSOA
  • Publication number: 20110283672
    Abstract: A gradual engagement system for use in power equipment is herein described. The gradual engagement system causes a clutch pulley to rotate around a clutch arm when an engagement tensile force is applied by an engagement spring. The engagement spring is attached to a pivot arm which is also connected to the clutch arm. The gradual engagement system allows the clutch arm to be pressed against a drive belt in a gradual fashion, providing for a smooth engagement of the various components of the power equipment.
    Type: Application
    Filed: May 20, 2010
    Publication date: November 24, 2011
    Inventors: Gordon W. Jackson, William R. Best, Harold E. Mills
  • Patent number: 8057334
    Abstract: An accessory drive tensioner assembly may include a bracket assembly, a fastener and a tensioner hub. The bracket assembly may include first and second bearings axially spaced from one another. The fastener may extend through the first and second bearings to rotationally couple the bracket assembly to an engine structure and may define a rotational axis for the bracket assembly. The tensioner hub may be coupled to the bracket assembly and may be located axially between the first and second bearings.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: November 15, 2011
    Assignee: GM Global Technology Operations LLC
    Inventor: Scott W. Kotzur
  • Publication number: 20110275465
    Abstract: A tensioning device is provided to aid in the maintenance and replacement of a drive member of a drive system. The tensioning device operates to maintain tension in the drive member during prolonged use of the drive system through a biased roller that receives and guides the drive member and adapts continuously to maintain tension as the drive member changes properties through use. The tensioning device further operates to ease the replacement of the drive member by being rotatable against the bias to provide slack within the drive member, such that the drive member may be removed from the belt drive system. The tensioning device includes an arm and a base, with the arm being capable of limited rotation about the base. The arm includes the roller for guiding the drive member and is biased in one direction to maintain tension within the drive member. The arm may be rotated against the bias towards an engaged position wherein the arm is restricted from counter rotation in the direction of the bias.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 10, 2011
    Applicant: Eurospec Manufacturing Inc.
    Inventors: Russel Vincent Gillis, Edilbert Delgado Yu
  • Patent number: 8038555
    Abstract: A new asymmetrically damped tensioner is provided utilizing a bearing-ramp clutch. During normal operation, the bearing-ramp clutch enables the tensioner arm to pivot in a first direction to take up belt slack with negligible frictional damping applied to the motion of the tensioner arm. When the tensioner arm pivots in a second direction, away from the belt, however, in a condition commonly known as wind-up, the bearing-ramp clutch locks against a fixed internal surface and creates a frictional damping force that is applied to the tensioner arm. This frictional linkage provides asymmetric frictional damping to the tensioner to limit movement in the second direction to mitigate wind-up.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: October 18, 2011
    Assignee: Dayco Products, LLC
    Inventors: Jeffrey A. Pendergrass, Robert C. Joslyn
  • Publication number: 20110224039
    Abstract: A process for producing a sliding bearing bush in a cast component of lightweight metal, preferably a tensioning lever of a belt tensioner. The process includes the following steps: a die, which forms the seat for a sliding bearing bush to be pressed in and has radially outer groove drawing noses, is inserted into a lightweight metal pressure die-casting die. After the liquid lightweight metal has been injected into the lightweight metal pressure die-casting die and subsequently solidified, the die is then drawn out of the lightweight metal pressure die-casting die in such a way that an aperture, which has a groove profile, is formed as a seat for the sliding bearing bush to be pressed in.
    Type: Application
    Filed: July 3, 2008
    Publication date: September 15, 2011
    Applicant: SCHAEFFLER KG
    Inventors: Michael Huss, Hermann Stief, Thomas Kraft
  • Patent number: 8002657
    Abstract: A tensioner operable to substantially maintain a specified tension in a flexible drive, such as a belt or chain, includes a spring, mounted laterally to the pivot shaft of the tensioner, which biases the tensioner arm towards the flexible drive. The spring is arcuate in shape and is maintained in a correspondingly arc-shaped spring retainer on a mounting plate of the tensioner. The arcuate shape of the spring and spring guide on the tensioner arm follows as the tensioner arm pivots towards and away from the flexible drive. The tensioner also has a wear take up mechanism to maintain the friction bushing in continuous engagement with the tensioner arm.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: August 23, 2011
    Assignee: Litens Automotive Partnership
    Inventors: John R. Antchak, James W. Dell, Hubertus G. Mevissen
  • Patent number: 7993226
    Abstract: A clamping device with mechanical damping for a traction mechanism drive is provided. The device includes a clamping arm which carries a tension roller on one end thereof and is rotatably mounted in a housing at the other end thereof via a shaft connected thereto in a rotationally fixed manner, and is elastically supported on the housing by a torsion spring. A free end of the shaft is connected to a friction disk in a rotationally fixed manner, and a friction lining is arranged between the friction disk and an axial abutment surface of the housing. The invention reduces the friction lining wear and increases the damping capacity thereof. To accomplish this, a separate friction disk (7??) is connected to a separate friction lining (8??) in a positively locked manner without play, and the separate friction lining ((8??) is in frictional contact with the axial abutment surface (10) of the housing (1).
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: August 9, 2011
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Stefan Mack, Bernd Hartmann, Thomas Mennerat, Jorg Kaiser, Manfred Wilhelm
  • Patent number: 7980976
    Abstract: A tensioner for tensioning a flexible drive means, such as a timing belt or chain, includes a pulley to contact the belt. The pulley is mounted on a tensioner arm and the tensioner arm can be rotated about a pivot shaft mounted to the tensioner by a spring. The axis about which the pulley rotates is spaced from the axis of the rotation of the tensioner arm with respect to the pivot shaft and the spacing of these axes of rotation results in the pulley moving through an eccentric towards or away from the belt when the tensioner arm is rotated. A stop is used to limit the range of movement of the tensioner arm between a desired range of movement defined by a free arm stop and a backstop. The position of the stop is adjustable by an installer. The angular range of movement of the tensioner arm is adjustable from a position suitable for installation of the tensioner to a position suitable for operation of the installed tensioner.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: July 19, 2011
    Assignee: Litens Automotive Inc.
    Inventors: Jacek Stepniak, Jorma J. Lehtovaara, Marek Frankowski
  • Patent number: 7972232
    Abstract: A chain drive tensioner system with translating pivot point is disclosed. The chain drive tensioner system with translating pivot point includes a chain drive tensioner assembly and a tensioner arm in operable communication with a chain. The chain drive tensioner assembly is in operable communication with the tensioner arm, and the tensioner assembly is moveable between a first tensioner position and a second tensioner position. The tensioner arm includes an internal gear and an external gear rotatably mounted within the internal gear, such that movement of the tensioner assembly from the first tensioner position to the second tensioner position along with concurrent rotation of the external gear within the internal gear is operable to move the tensioner arm laterally from a first position to a second position.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: July 5, 2011
    Assignee: GM Global Technology Operations LLC
    Inventor: Clyde A. Bulloch
  • Publication number: 20110081999
    Abstract: A belt assembly and adjustment mechanism for a belt drive system including a belt. The belt assembly and adjustment mechanism includes a first bracket that is attachable to a first portion of the belt drive system, and a second bracket that is attachable to a second portion of the belt drive system. The second portion is different from the first portion. The mechanism also includes a belt drive system component that is positioned between the first bracket and the second bracket. The component is pivotally coupled to the first bracket on one side of the component and is pivotally coupled to the second bracket on another side of the component. The component is further slidably coupled to one of the first bracket and the second bracket such that the component is movable between a first orientation at which the belt is configured to be tensioned and a second orientation at which the belt is configured to be installed on the component.
    Type: Application
    Filed: October 1, 2010
    Publication date: April 7, 2011
    Applicant: THERMO KING CORPORATION
    Inventor: Brendan H. Geraghty