Interposed Friction Or Braking Element Patents (Class 464/68.4)
  • Patent number: 11287024
    Abstract: A pulley decoupler for a drive train of a motor vehicle is disclosed for eliminating or reducing rotation-related irregularities transmitted by a crankshaft. The pulley decoupler comprises a pulley hub, an arc spring flange, and a torsional vibration damper flange of a torsional vibration damper. In embodiments, the pulley hub, the arc spring flange, and the torsional vibration damper flange are configured to be non-rotatably mounted on a crankshaft by at least one crankshaft screw. The pulley hub has an outer lateral surface region on which both the torsional vibration damper flange and the arc spring flange are received and on which they are configured to be non-rotatably mounted.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 29, 2022
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Philipp Rasch, Alexander Rose, Andreas Stuffer
  • Patent number: 11236800
    Abstract: A damper device is disclosed. The damper device includes first and second rotary members, a plurality of elastic members, and a plurality of end seat members. The first rotary member includes a first engaging portion and an annular chamber filled with a viscous fluid in an interior thereof. The second rotary member includes a second engaging portion, and is rotatable relative to the first rotary member. The plurality of elastic members are aligned in a circumferential direction in the interior of the annular chamber, and elastically couple the first rotary member and the second rotary member in a rotational direction. Each of the plurality of end seat members is disposed between one of the plurality of elastic members and at least one of the first and second engaging portions. The each of the plurality of end seat members includes an end seat communicating groove penetrating therethrough in the circumferential direction.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: February 1, 2022
    Assignee: EXEDY CORPORATION
    Inventors: Masataka Aikawa, Hiroki Matsuo
  • Patent number: 10030739
    Abstract: A damper device includes a dynamic damper that has third springs coupled to an intermediate member and that also has, as a mass body coupled to the third springs, a turbine runner and a coupling member etc. The third springs of the dynamic damper are disposed so as to overlap both in the axial and radial directions of the damper device second springs that have higher rigidity than first springs and that are disposed inward of the first springs to transfer torque between a drive member and a driven member.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: July 24, 2018
    Assignees: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.
    Inventors: Yoshihiro Takikawa, Yoichi Oi, Takayuki Miyaoka, Yuichiro Hirai, Makoto Yamaguchi, Takuya Yoshikawa, Tomonori Kinoshita, Aki Ogawa, Masahiro Hata
  • Patent number: 9909644
    Abstract: A tuned mass vibration damper for damping a vibration component of a rotational movement, has at least one guide component part configured to movably guide the damper masses such that the damper masses are offset along a circumferential direction, and a dimensionally stable spacer component part that is rotatable relative to the guide component part and which has a positive engagement connection with clearance with the damper masses that are configured such that, starting from a center position of the damper masses with respect to the spacer component part, when one of the damper masses executes an oscillation which overcomes a clearance in the connections of two of the damper masses with respect to the spacer component part, the spacer component part is rotated along the circumferential direction such that it drives the other damper mass of the two damper masses along the circumferential direction.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: March 6, 2018
    Assignee: ZF Friedrichshafen AG
    Inventors: Stojan Cegar, Michael Wirachowski, Kyrill Siemens
  • Patent number: 9791019
    Abstract: An intermediate member of a damper device includes a plate portion that has spring abutment portions that abut against inner springs. Spring abutment portions of a coupling member of a dynamic damper extend from a fixed portion via a bent portion to be disposed in opening portions of the plate portion, and abut against end portions of third springs disposed in the opening portions such that the third springs are arranged side by side with the inner springs in the circumferential direction. The plate portion and the spring abutment portions at least partially overlap each other in the thickness direction. The axes of the inner springs and the third springs are included within the range of overlap between the plate portion and the spring abutment portions in the thickness direction.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: October 17, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Yoshihiro Takikawa, Yoichi Oi, Takayuki Miyaoka, Yuichiro Hirai, Makoto Yamaguchi, Takuya Yoshikawa, Masahiro Hata
  • Patent number: 9599186
    Abstract: A flywheel assembly includes a first rotary member, a second rotary member, a first coil spring, a second coil spring, an intermediate plate, a first stopper mechanism and a first contact relief member. The first coil spring is configured to be compressed between the first rotary member and the second rotary member. The second coil spring is configured to be compressed between the first rotary member and the second rotary member and has a stiffness greater than a stiffness of the first coil spring. The intermediate member is engaged with the first coil spring and the second coil spring and couples the first coil spring and the second coil spring in series. The first stopper mechanism is configured to deactivate the first coil spring. The first contact relief member is movably disposed inside the first coil spring and is capable of relieving the contact in the first stopper mechanism during activation of the first coil spring.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: March 21, 2017
    Assignee: EXEDY Corporation
    Inventors: Hiroshi Uehara, Yoshinari Yoshimura, Takeshi Senoue
  • Patent number: 9556948
    Abstract: An alternator damper pulley for a vehicle includes a pulley body connected to an engine to receive a rotational power from an engine. A shaft connection portion is provided within the pulley body such that a rotational shaft of an alternator is insertedly coupled therein. A torsion spring is installed on an outer circumferential surface of the shaft connection portion to reduce a variation of the rotational power transmitted from the pulley body. A clutch is interposed between the torsion spring and the pulley body to connect or disconnect the shaft connection portion and the pulley body. A friction damper is installed to apply frictional damping force to the shaft connection portion.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: January 31, 2017
    Assignee: Hyundai Motor Company
    Inventor: Jeyong Yun
  • Patent number: 9127721
    Abstract: A torsional damper (1) comprises a hub (2) coupled to a radial annular web (6); two guide washers; elastic members (9); and friction means, relative angular deflections of the guide washers and the annular web (6) being limited in a first rotation direction (D) by a first series of stops (23) of the guide washers that interact with a first series of protruding parts (25) of the annular web (6), and in a second rotation direction (R) by a second series of stops (24) of the guide washers that interact with a second series of protruding parts (26) of the annular web (6).
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: September 8, 2015
    Assignee: VALEO EMBRAYAGES
    Inventors: Roel Verhoog, Michael Hennebelle
  • Patent number: 9086116
    Abstract: A damper device comprises: a first shaft that outputs rotational power from a power source; a second shaft that transmits rotational power to a gear mechanism and has outer splines; a first rotational member(s) to which the rotational power of the first shaft is transmitted; a second rotational member spline-engaged with the outer splines; a damper unit that absorbs torque fluctuation between the first and second rotational members; and an inertial body having inner splines spline-engaged with the outer splines and having an annular portion. The tooth parts of the inner splines are pressed into contact with the tooth parts of the outer splines in the circumferential direction of the inertial body.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: July 21, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomohiro Saeki, Satoshi Nakagaito, Hiroaki Suezaki, Yuki Miyamoto
  • Patent number: 8795092
    Abstract: An angular damping device (10) for a motor vehicle temporary wet coupling system comprises two radial guide washers (24) which are positioned axially one on each side of a web (12),at least two elastic members (38) with circumferential action which are circumferentially interposed in series between the web (12) and the guide washers (24), and a phase member (42) which comprises at least one radial phase lug (48). The phase member (42) further comprises two friction pads which can parted axially against each of the guide washers (24). Each of the friction pads comprises a retaining face (54) for retaining an elastic member (38) against the action of centrifugal force. The elastic member (38) is partially inserted between the two retaining faces (54)in the manner of a wedge.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 5, 2014
    Assignee: Valeo Embrayages
    Inventor: Roel Verhoog
  • Patent number: 8647211
    Abstract: The torque limiter includes a flywheel, a clutch plate, a spline hub, a clutch disc assembly and a transmission torque limiting part. The flywheel includes a friction coupling surface. The clutch plate includes plural axial through holes. Plural friction members are respectively attached to the through holes. The spline hub can be engaged with a transmission-side shaft. The clutch disc assembly circumferentially elastically couples the clutch plate and the spline hub. The transmission torque limiting part limits torque to be transmitted from the flywheel to the transmission-side shaft while the friction members are interposed and held between the transmission torque limiting part and the friction coupling surface of the flywheel.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: February 11, 2014
    Assignee: Exedy Corporation
    Inventors: Yasunori Doman, Takashi Harada, Yoshinari Yoshimura
  • Patent number: 8465372
    Abstract: The torque fluctuation absorber includes a flywheel fixed on a first rotating shaft by a fixation member, a damper unit connected with a second rotating shaft and absorbs fluctuation of torque occurred between the first rotating shaft and the second rotating shaft by elastic force, and a limiter unit provided on a power transmission path between the flywheel and the damper unit and inducing a slide when the fluctuation of the torque exceeded a predetermined value. A predetermined member rotates with the first rotating shaft on a power transmission path between the first rotating shaft and the limiter unit. The predetermined member has a side plate at the damper unit and a guide portion that prevents movement radially of a hub member, and the guide portion is provided at radially internal side of the fixation member.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: June 18, 2013
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tomohiro Saeki, Satoshi Nakagaito, Toshiyuki Saburi, Masanori Suzuki, Hiroaki Suezaki
  • Patent number: 8414404
    Abstract: In this damper mechanism, when small fluctuations in torque input to the damper mechanism occur, small hysteresis torque is produced as a result of pressure contact between a radial plate and a first friction section. Consequently, the small torque fluctuations can be damped between the radial plate and the first friction region of the damper mechanism and can be output to an input shaft. In addition, along the direction of relative rotation of an annular plate and the radial plate, the friction coefficients of the annular plate and the radial plate become larger as the torsion angles of both plates become larger. Therefore, even when torque fluctuations become large, the hysteresis torque can be produced in accordance with the magnitude of the torque fluctuations.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: April 9, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsushi Takenaka, Yuichi Miwa, Taku Harada, Yoshimitsu Yokouchi, Takeshi Miyagawa, Koji Hayashi
  • Patent number: 8197347
    Abstract: A damper device includes a first plate member rotated when the rotational force is inputted from an input side, a second plate member rotatable relative to the first plate member and outputting the rotational force to an output side when rotated in response to rotation of the first plate member, a damper portion for absorbing relative rotation between the first plate member and the second plate member, and a hysteresis portion for absorbing the relative rotation by a friction force. The hysteresis portion includes an intermediate member between the first plate member and the second plate member, and the intermediate member is pressed against one of the first plate member and the second plate member by the other one of the first plate member and the second plate member when the first plate member and the second plate member rotate relative to each other.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: June 12, 2012
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tomohiro Saeki, Satoshi Nakagaito, Yoshitaka Inoshita, Masanori Suzuki, Hiroaki Suezaki
  • Publication number: 20120077604
    Abstract: A torque fluctuation absorber includes a first damper portion absorbing torque fluctuations caused by a torsion between a first rotary member and a second rotary member, a second damper portion absorbing torque fluctuations caused by a torsion between the second rotary member and a third rotary member, and a stopper portion. The first rotary member includes a first projecting portion projecting radially inwardly and being contactable with the stopper portion by the torsion between the first rotary member and the second rotary member. The third rotary member includes a second projecting portion projecting radially outwardly and being contactable with the stopper portion by the torsion between the third rotary member and the second rotary member. The second projecting portion makes contact with the stopper portion at a radially inner side relative to a portion where the first projecting portion makes contact with the stopper portion.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 29, 2012
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tsutomu SEKINE, Yoshihiro Miyamachi
  • Publication number: 20110244967
    Abstract: A flywheel device includes a mass-side rotor including a mass ring and a pair of holder plates connected to both sides of the mass ring. The mass-side rotor is connected to a crankshaft with a drive plate therebetween. Between the mass-side rotor and the drive plate, a positioning apparatus for positioning those coaxially with each other is provided. The positioning apparatus includes: an annular positioning protrusion which is press formed in at least one of the pair of holder plates to project laterally outward therefrom, and which is disposed coaxially with the mass-side rotor; and a positioning recessed portion which is press formed in the drive plate coaxially with the crankshaft, and which is fitted to the positioning protrusion. Accordingly, it is possible to enable coaxial positioning of the mass-side rotor and the drive plate without performing burdensome machining on the mass ring for forming a positioning apparatus.
    Type: Application
    Filed: March 9, 2011
    Publication date: October 6, 2011
    Applicant: YUTAKA GIKEN CO., LTD.
    Inventors: Ichiro USUI, Hiroyuki Saito
  • Patent number: 7966817
    Abstract: An internal combustion engine comprises includes a turbo-compound and the known Föttinger-coupling is replaced by a torsion vibration damper. The Föttinger-coupling, which is used to transmit power, has high losses in power when it is necessary to have a differential rotational speed between the input side and the output side, that is, the appearance of a slip. The losses are not used in a torsion vibration damper which has at least the same quality as a Föttinger-coupling.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: June 28, 2011
    Assignee: LuK Vermoegensverwaltungsgesellschaft mbH
    Inventors: Kai Sebastian Schenck, Wolfgang Reik, Bruno Muller
  • Publication number: 20100243404
    Abstract: A torque fluctuation absorber includes: a first plate member, a second plate member, arranged axially with a predetermined distance from the first plate member, a third plate member which rotates integrally with the first plate member, and is arranged axially with a predetermined distance from the second plate member; slide members located between the second plate member and the third plate member; and an elastic member which is supported by the first plate member and biases the second plate member towards the plurality of slide members. The plurality of slide members are configured to generate a first hysteresis torque when a torsion angle between the second plate member and the third plate member is within a predetermined range, and to generate a second hysteresis torque greater than the first hysteresis torque when the torsion angle exceeds the predetermined range.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 30, 2010
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomohiro SAEKI, Makoto Takeuchi, Satoshi Nakagaito, Atsushi Yamazumi
  • Patent number: 7559844
    Abstract: A torque fluctuation absorber includes a disc fixed to a flywheel, a hub fixed to a transmission, first and second side plates fixed to the disc, a damper member, first and second control plates provided at axial both sides of the hub, the first and second control plates being riveted by a stopper pin, a first hysteresis mechanism including first and second low friction members and generating a small hysteresis, and a second hysteresis mechanism including first and second high friction members and generating a large hysteresis. The hub includes a flange portion having a through-hole into which the stopper pin is inserted. A relative rotational angle between the control plates and the hub is defined by a clearance formed between the through-hole and the hub. The first hysteresis mechanism is activated when the relative rotational angle is defined within the clearance.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: July 14, 2009
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tomohiro Saeki, Satoshi Nakagaito, Makoto Takeuchi, Masanori Suzuki, Masaru Ebata
  • Patent number: 7497146
    Abstract: A method is provided for filtering out rotational vibrations transmitted by a drive shaft (11, 111) to an output shaft (19, 119, 219). The method comprises the following steps. First, a filtering device is provided that includes a drive shaft damper (20, 120, 220) mounted to the output shaft 19 and an electromagnetic modulating device. The drive shaft damper (20, 120, 220) is selectively tuneable by the electromagnetic modulating device to a frequency of a rotational vibration which is inside the range of frequencies of the rotational vibrations to be damped out. Then, a frequency of a rotational vibration transmitted by the drive shaft (11, 111) is measured. Subsequently, the frequency of the rotational vibration of the drive shaft damper (20, 120, 220) is matched to the frequency of the rotational vibrations transmitted by the drive shaft (11, 111).
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: March 3, 2009
    Assignee: Valeo Embrayages
    Inventor: Jacques Clausin
  • Patent number: 7467699
    Abstract: A double mass flywheel has an inertia member, a flexible plate, a second flywheel, an elastic member, and a friction generation mechanism. The flexible plate is deformable in a bending direction and connects the inertia member to a crankshaft. The second flywheel is formed with a clutch friction surface. The elastic member elastically connects the second flywheel to the crankshaft in the rotational direction. The friction generation mechanism is located functionally in parallel with the elastic member in the rotational direction. The friction generation mechanism is held by the flexible plate.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: December 23, 2008
    Assignee: Exedy Corporation
    Inventors: Hiroyoshi Tsuruta, Hiroshi Uehara
  • Publication number: 20080149444
    Abstract: A torsional vibration damper for incorporation into the power train of a motor vehicle. The vibration damper includes an input part that is rotatable around an axis of rotation relative to an output part with energy storage elements interposed. At least one holding element is provided on the output part for retaining the energy storage elements on the output part.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 26, 2008
    Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventor: Mario Degler
  • Patent number: 7364511
    Abstract: A torsional vibration damper includes: a primary mass adapted to be coupled to an engine crankshaft and defining a substantially ring-shaped chamber that is divided into at least two portions; a secondary mass relatively rotatably connected to the primary mass and connectable with a clutch; and a damping unit for coupling the primary and secondary masses to each other in a rotationally elastic manner. The damping unit includes a plurality of coil springs, a pair of end guides, and a friction guide that is disposed between neighboring coil springs and provided with an outer circumferential surface configured to be rubbed against an outer wall of the ring-shaped chamber. An oil groove is formed on the outer circumferential surface of the friction guide and at least a portion of the oil groove is formed to be slanted with respect to a circumferential direction of the ring-shaped chamber.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: April 29, 2008
    Assignee: Hyundai Motor Company
    Inventors: Tae Han Jee, Young Rae Song, Jae Hoon Jung
  • Patent number: 7357722
    Abstract: A variable damper includes a first plate connected to a first rotating shaft and a second plate connected to a second rotating shaft. A damper spring transmits power between the first and second plates, and a variable friction apparatus regulates a frictional force between the first and second plates. The variable friction apparatus includes a solenoid coil, a solenoid pawl, a pressure plate with a slanted surface, a friction plate between the pressure plate and the second plate, a wedge contacting the pressure plate and movable along the slanted surface in response to the state of the solenoid pawl, and a wedge spring supporting the wedge.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: April 15, 2008
    Assignee: Hyundai Motor Company
    Inventors: Young Heub Kim, Dong Hoon Park
  • Patent number: 7347122
    Abstract: A filtering device is provided for filtering vibrations transmitted by a rotating engine component (11) adapted to drive in rotation an output shaft (19), which device comprises a drive shaft damper (20) tuned at a frequency substantially locked within a range of frequencies to be damped: electromagnetic modulating systems (23) are designed to adapt the frequency of the damper (20) to the frequency of the vibrations transmitted by the rotary component (11). Moreover, a transmission is provided for motor vehicle comprising a drive shaft (11), linked to a rotary component formed by the motor vehicle engine crankshaft, an output shaft (19) linked to the drive shaft releasable via a clutch, a gearbox (50), the output shaft (19) being the input shaft of the gearbox (50), a filtering device being provided for filtering vibrations emitted, hence transmitted, by the rotary component.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: March 25, 2008
    Assignee: Valeo Embrayages
    Inventor: Jacques Clausin
  • Patent number: 7303479
    Abstract: A friction resistance generation mechanism is disposed between two relatively rotatable members of a rotating mechanism. The mechanism includes an input side disk-like plate 32, output side disk-like plates 30 and 31, friction shims 361A, 361B, and 361C aligned and disposed in a direction of rotation. A plurality of elastic members is disposed among the friction shims in the direction of rotation.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: December 4, 2007
    Assignee: Exedy Corporation
    Inventors: Hiroyoshi Tsuruta, Hiroshi Uehara
  • Patent number: 7291241
    Abstract: A bonded part such as a rubber to metal bonded part and process for producing a bonded part including a rubber and metal part, and particularly for producing an automotive torsional vibration damper, comprising the steps of placing uncured elastomer composition comprising an elastomer, at least one curative, and preferably, at least one rubber-to-metal adhesive adjuvant into a shape-forming mold, and curing the elastomer in two stages, wherein in the first curing stage the elastomer composition is less than fully cured and in the second curing stage, preferably performed with the elastomer composition in contact with a metal surface of the rubber and metal part, the elastomer composition is at least substantially fully cured. According to one embodiment, the present invention allows for the elimination of the step of applying an adhesive to the metal surface prior to application of the elastomer composition.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: November 6, 2007
    Assignee: The Gates Corporation
    Inventor: Paul N. Dunlap
  • Patent number: 7238112
    Abstract: A torsional-vibration damper includes a primary element operatively connected for rotation with a prime mover and a secondary element operatively connected with the input to a transmission. A spring mechanism is operatively disposed between and adapted to control the primary element and the secondary element in damped torque translational relationship. The torsional-vibration damper also includes a friction device having a plurality of fiction blocks that frictionally join the primary element with the secondary element. The secondary element includes an output-side member having a first axial ridge and a drive-side member having a second axial ridge. The output-side member and the drive-side member operatively encompass the primary element and the first axial ridge overlaps the second axial ridge. The first and the second axial ridges thereby cooperate to provide a double layer of radial support for the spring mechanism.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: July 3, 2007
    Assignee: BorgWarner. Inc.
    Inventors: Norbert Bastel, Juergen Kroll, Till Ebner
  • Patent number: 7204761
    Abstract: A torsional vibration damper is provided which comprises a primary mass, a secondary mass, and a damping unit. The primary mass defines a ring-shaped chamber, and the ring-shaped chamber is divided into at least two portions. The secondary mass is rotatably connected to the primary mass. The damping unit couples the primary and secondary masses to each other in a rotationally elastic manner. The damping unit comprises a plurality of elastic members, a pair of end guide, and a friction member disposed between the elastic members.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: April 17, 2007
    Assignee: Hyundai Motor Company
    Inventor: Tae Han Jee
  • Patent number: 7192354
    Abstract: A first damper mechanism 159 for absorbing and attenuating minute torsional vibration in a damper disk assembly for transmitting torque in a vehicle, has a plate spring 162. The plate spring 162 extends in the rotational direction having main surfaces facing in the radial direction. The plate spring 162 is pushed by the hub 106 in the rotational direction to slide against the intermediate rotating member 110 when the hub 106 and the intermediate rotating member 108 rotate relative to each other, thereby generating friction resistance.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: March 20, 2007
    Assignee: Exedy Corporation
    Inventor: Hiroshi Uehara
  • Patent number: 7140966
    Abstract: A torsional vibration damper is provided which comprises a primary mass, a secondary mass, and a damping unit. The primary mass defines a ring-shaped chamber, and the ring-shaped chamber is divided into at least two portions. The secondary mass is rotatably connected to the primary mass. The damping unit couples the primary and secondary masses to each other in a rotationally elastic manner. The damping unit comprises a plurality of elastic members, a pair of end guide, and a friction member disposed between the elastic members.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: November 28, 2006
    Assignee: Hyundai Motor Company
    Inventor: Tae Han Jee