Elastomeric Spring Patents (Class 267/219)
  • Patent number: 10974560
    Abstract: A suspension includes a jounce bumper, and a striker. A spring biases the knuckle toward a first position. One of the spring and the jounce bumper is disposed forward of a kingpin axis of the knuckle and the other of the spring and the jounce bumper is disposed rearward of the kingpin axis. When in a first position, the spring is a first spring length. When in a second position, the spring is shorter than in the first position and the jounce bumper contacts the striker. When in a third position, the spring is shorter than in the second position and the jounce bumper is compressed against the striker to be shorter than in the second position. When moving between the second and third positions, the spring and jounce bumper impart moments on the knuckle that approximately balance each other to maintain a desired caster angle.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: April 13, 2021
    Assignee: Rivian IP Holdings, LLC
    Inventor: Max Koff
  • Patent number: 10967723
    Abstract: A fluid-filled vibration damping device including an inner member, an outer member having a tubular part, a main rubber elastic body elastically connecting the two members, and a partition disposed on a radially inner side of the tubular part. An axial end portion of the main rubber elastic body is anchored to a radially inner surface of the tubular part and includes a sealing rubber. The partition includes a press-sealing face positioned at an outer peripheral edge of an axial end face thereof, and is pressed against an axial end face of the sealing rubber at the press-sealing face. A seal rib protruding axially outward from the press-sealing face of the partition is more strongly pressed against the axial end face of the sealing rubber such that a fluid-tight sealing is provided axially between the sealing rubber and the partition.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: April 6, 2021
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Yasuhiro Komiya, Shingo Tanaka
  • Patent number: 10900534
    Abstract: Gas spring and gas damper assemblies include a gas spring and a gas damper. The gas spring includes a flexible spring member with opposing end members secured thereto and at least partially defining a spring chamber. An elongated damping passage having a spiral configuration extends through one of the end members. The gas damper includes a damper housing that at least partially defines a damping chamber in fluid communication with the spring chamber through the elongated damping passage. A damper piston assembly is received within the damping chamber and secured to the other of the end members. Suspension systems and methods are also included.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: January 26, 2021
    Assignee: Firestone Industrial Products Company, LLC
    Inventor: Joshua R. Leonard
  • Patent number: 10882371
    Abstract: A single-tube oscillation damper for a motor vehicle may include a damper tube that is at least partially filled with damping fluid and in which a piston rod is movable back and forth, an operating piston that can be moved with the piston rod, and an end remote from the piston rod for bearing in a dome bearing. The end may include a transition region from an outer diameter of the damper tube to an outer diameter of the single-tube end remote from the piston rod. The end may also comprise a support region arranged in the transition region. The single-tube oscillation damper may further include a stop plate and at least one damping element. The stop plate may be arranged on the support region, and the at least one damping element may be arranged on the stop plate at a side facing the end.
    Type: Grant
    Filed: May 15, 2017
    Date of Patent: January 5, 2021
    Assignees: THYSSENKRUPP BILSTEIN GMBH, THYSSENKRUPP AG
    Inventors: Matthias Becker, Frank Sprenger, Peter Knueppel
  • Patent number: 10844578
    Abstract: A cylinder protection device for a cylinder of a machine includes a cylindrical body. The cylinder protection device includes a first portion having a first surface and a second surface. The first and second surfaces are disposed between a first end and a second end of the first portion. The first and second surfaces are inclined relative to each other. Further, the first and second surfaces intersect at a first upper edge of the first portion. The cylinder protection device also includes a second portion disposed on the cylindrical body and connected to the second end of the first portion. The second portion includes a third surface and a fourth surface inclined relative to each other. Further, the third and fourth surfaces intersect at a second upper edge of the second portion. The second upper edge is inclined relative to the first upper edge of the first portion.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: November 24, 2020
    Assignee: Caterpillar Inc.
    Inventor: Timothy Allen Vik
  • Patent number: 10787272
    Abstract: An actuator is provided for an aircraft engine and includes a tubular base layer and a visco-elastic layer adhesively disposed on the tubular base layer.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: September 29, 2020
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Pavan Kumar Vinjanampati, Rajasekaran Janakiraman
  • Patent number: 10760642
    Abstract: The present invention provides a liquid-filled vibration isolator with improved durability. The liquid-filled vibration isolator includes a shaft unit, a first unit, an elastic body coupling the first unit and shaft unit, and a second unit mounted radially outside the first unit. The first unit includes a pair of annular elements, a pair of coupling elements coupling the annular elements, while the elastic body includes outer face portions bonded to outer surfaces of the coupling elements. The outer face portions include lips making contact with the second unit, and first segments making contact with the second unit on areas larger than the lips. The second unit restrains the annular elements along the entire circumferences, and compresses the lips and first segments in the radial direction.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: September 1, 2020
    Assignee: TOYO TIRE CORPORATION
    Inventors: Norifumi Yamada, Gen Isawa
  • Patent number: 10578187
    Abstract: A vibration isolation device (10) of the present invention includes: a tubular first attachment member (11) coupled to one of a vibration generating part and a vibration receiving part, and a second attachment member (12) coupled to the other thereof; an elastic body (13) which couples both the attachment members together; and a partition member (16) which partitions a liquid chamber in the first attachment member (11) in which a liquid (L) enclosed into a first liquid chamber (14) and a second liquid chamber (15), in which at least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) as a portion of a wall surface thereof; and a communication passage (30) which communicates with the first liquid chamber (14) and the second liquid chamber (15), and a barrier rigid body (33) which is disposed in the communication passage (30) are provided in the partition member (16).
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: March 3, 2020
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Akira Ueki
  • Patent number: 10442266
    Abstract: An air spring assembly for a vehicle having a damper body decoupled from a piston, allowing the damper to rotate freely without inducing torsion into the piston. The air spring assembly includes a damper body, where part of the damper body is disposed in a piston, and a decoupling mechanism connected to the damper body. The decoupling mechanism allows for rotation of the damper body relative to the piston, preventing torsion from being transferred from the damper body to the piston. The decoupling mechanism includes an adapter ring connected to the damper body, and a rotatable machine element surrounding the damper body. The adapter ring is surrounded part of the piston, and the rotatable machine element is adjacent the adapter ring. The inner wall of the piston is in contact with the rotatable machine element, such that the rotatable machine element facilitates relative rotation between the piston and damper body.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: October 15, 2019
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Garrett Mark Pniewski, Joseph G Jerisk
  • Patent number: 10436281
    Abstract: A hydraulic engine mount, capable of preventing a rattle noise, improving Noise, Vibration, and Harshness (NVH) performance by lowering dynamic characteristics of the hydraulic engine mount in an idling state, and capable of generating a high damping value in a state having a relatively large amount of vibration displacement, includes a case having a hydraulic fluid sealed therein, a nozzle plate having a lower nozzle plate and an upper nozzle plate coupled to an upper portion of the lower nozzle plate, and dividing an inside of the case into an upper fluid chamber and a lower fluid chamber, a first membrane disposed on the upper portion of the lower nozzle plate such that a first edge portion of the first membrane is tightly coupled to the upper portion of the lower nozzle plate, and provided with at least one first communicating hole, a second membrane disposed on a lower portion of the upper nozzle plate such that a second edge portion of the second membrane is tightly coupled to the lower portion of the u
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: October 8, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Hyo Seok Kim
  • Patent number: 9370985
    Abstract: An air spring for air suspension system comprises a piston assembly and a damper assembly. A plurality of crush ribs are spaced apart from one another located within an internal cavity defined by the piston assembly and extending in an axial direction. A striker cap is located proximate to a first end of the damper assembly. There is a first interference fit between the damper assembly and the striker cap and there is a second interference fit between the striker cap and the crush fins, such that the piston assembly and the damper assembly are rotationally fixed relative to one another.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: June 21, 2016
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Kranti Kiran Manga, Garrett Mark Pniewski, David Lee Hockey, Christian Schallmeier
  • Patent number: 9243679
    Abstract: The present invention is an anti-vibration device (1) that includes: a first mounting component (2) that is cylindrically-shaped and joined to one of a vibration generating portion and a vibration receiving portion; a second mounting component (3) that is joined to the other one of the vibration generating portion and the vibration receiving portion; a first elastic body (4) that elastically joins the first mounting component (2) and the second mounting component (3) together; a fluid chamber (5) that is provided inside the first mounting component (2) and inside which a fluid is sealed; a first partitioning wall (10) that divides the fluid chamber (5) in an axial direction so as to define a main fluid chamber (8), a portion of wall surfaces of which is the first elastic body, and an auxiliary fluid chamber; a second partitioning wall (12) that divides the main fluid chamber (8) in a circumferential direction so as to define a plurality of divided main fluid chambers (11); and a plurality of restricting passa
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: January 26, 2016
    Assignee: BRIDGESTONE CORPORATION
    Inventor: Akio Shimamura
  • Patent number: 9140306
    Abstract: The invention relates to a rotational movement damper (1) comprising an outer sleeve (2) and an axle which fits in the outer sleeve (2) and mounted to rotate in the outer sleeve. The axle comprises at least two discoidal flanges (7, 8, 17, 18) with flat flange surfaces (9, 10) and the same diameter, fitting in annular channels (12, 13, 14, 15) in the outer sleeve (2) such that the flanges contact with the planar flange surfaces (9, 10) thereof against the equally planar area on the counter surfaces of the annular channels (12, 13, 14, 15) unaffected by temperature variations and, on counter-rotation of the outer sleeve (2) and axle (3) act as a slipper clutch.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: September 22, 2015
    Assignee: Ejot GmbH & Co. KG
    Inventors: Rolf Kuenkel, Walter Kornsteiner, Reinhold Lenherr, Axel Tome
  • Patent number: 9010741
    Abstract: The suspension bump stop device comprises a rolling bearing (44) that forms an axial bump stop, equipped with an upper ring (46), with a lower ring (48) and with a plurality of rolling elements positioned between the rings, the upper and lower rings being supported respectively by an upper cup (40) and a lower cup (42), the lower cup forming a bearing means for a suspension spring (18), at least one sealing lip being provided on one of the cups so that it bears against a bearing surface portion of the other cup. The bearing surface portion is substantially cylindrical, the sealing lip being directed downwards away from the rolling bearing and bearing with radial interference against the said surface portion, the said substantially cylindrical surface portion being connected towards the top to a shoulder against which the lip can bear if the two cups become radially eccentric relative to one another.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: April 21, 2015
    Assignee: Aktiebolaget SKF
    Inventors: Samuel Viault, Yves-André Liverato, Cédric Brulard, Guy Heck
  • Patent number: 9004466
    Abstract: A system and method to change a spring rate of a damper in real time. The damper includes a housing having an inner surface that forms a cavity. An elastomeric material is disposed within the cavity and fixedly attached to the inner surface of the housing. A first chamber is formed by a first end of the elastomeric material and the inner surface of the housing. The method includes restricting movement of the elastomeric material by regulating the pressure within the first chamber, which in turn changes the spring rate of the damper.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: April 14, 2015
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Brian E. Barnes, Frank B. Stamps
  • Patent number: 8979075
    Abstract: A gas spring assembly includes an end member, a piston assembly and a flexible sleeve secured therebetween. An end closure secures an end of the flexible sleeve to the piston assembly. A connector fitting connects the end closure to a support post of the piston assembly. The connector fitting includes a fitting passage and a first annular groove. A jounce bumper assembly is supported on the connector fitting. The jounce bumper assembly includes a bumper body and a bumper mount. The bumper mount includes securement pin having a second annular groove. A retaining member is received within the first and second annular grooves such that the jounce bumper assembly can freely rotate relative to the connector fitting while substantially restricting axial displacement of the jounce bumper assembly relative to the piston assembly during such rotation.
    Type: Grant
    Filed: April 26, 2010
    Date of Patent: March 17, 2015
    Assignee: Firestone Industrial Products Company, LLC
    Inventors: Stephen C. Street, James D. Boomer
  • Publication number: 20150014907
    Abstract: A suspension strut for a vehicle has an air spring unit and a damper unit. The damper unit has a damper tube, which extends into a rolling tube of the air spring unit. The damper tube has supporting geometries distributed over its circumference, against which supporting geometries a radially expanded end of the rolling tube is supported. In order to support the rolling tube on the supporting geometries of the damper tube, a torsion element is provided. The torsion element is arranged between the radially expanded end of the rolling tube and the supporting geometries of the damper tube. The torsion element forms a form fit with the supporting geometries for the purpose of torque transmission.
    Type: Application
    Filed: January 7, 2013
    Publication date: January 15, 2015
    Inventors: Olaf Reichmann, Steffen Werner, Georg Meinert, Mirco Adam
  • Patent number: 8894051
    Abstract: Disclosed is a liquid-sealed vibration isolator (10) provided with a main liquid chamber (42), a portion of the chamber wall of which is formed from a vibration isolating base (16), a subsidiary liquid chamber (44), a portion of the chamber wall of which is formed from a first diaphragm (38), and a first orifice flow path (50) which connects both liquid chambers, wherein a high-frequency second orifice flow path (54) which connects the main liquid chamber (42) and the subsidiary liquid chamber (44) is formed on a partitioning body (40), and a second diaphragm (60) is provided on the opening (59A) of the second orifice flow path (54) on the side of the main liquid chamber. The outer peripheral portion (60A) of the second diaphragm is held by the partitioning body (40) in a liquid-tight manner, and the second diaphragm (60) abuts the peripheral edge portion of the opening (54A) so as to block said opening with a flexible membrane section (60B) which is provided on the inside of the second diaphragm (60).
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: November 25, 2014
    Assignees: Toyo Tire & Rubber Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kentaro Yamamoto, Yoshiyuki Seno, Gen Isawa, Katsuhiro Sakurai
  • Publication number: 20140333018
    Abstract: A hydro bush includes an outer pipe, an inner pipe, a rubber portion that is installed between the outer pipe and the inner pipe, and stoppers that are installed at both side ends. The hydro bush further includes a liquid chamber which is formed between the outer pipe and the rubber portion, and filled with a working fluid; and a flow path which is formed between the outer pipe and the rubber portion, and connected to the liquid chamber so as to guide the working fluid when the working fluid flows, in which the flow path includes a protruding portion which is formed to protrude inward. Accordingly, a flow distance of a working fluid flowing along the flow path may be increased without increasing a size of the hydro bush, thereby securing various dynamic characteristics.
    Type: Application
    Filed: March 21, 2014
    Publication date: November 13, 2014
    Applicant: HYUNDAI MOBIS CO., LTD.
    Inventor: Seung Hwan CHA
  • Publication number: 20140217663
    Abstract: Rotary damper (1) for a motor vehicle, with at least one damping element (2) for damping the relative movement between a first mass disposed on the wheel suspension side and a second mass disposed on the vehicle body side. The damping element (2) has at least one rotatable damper part, which can be set in rotation by a lever element (5) that moves as a result of the motion of the mass and is mechanically coupled to the damping element to permit motion, wherein at least one spring damping element (6) is integrated into the mechanical motion-coupling between the lever element (5) and the rotatable damper part.
    Type: Application
    Filed: May 8, 2012
    Publication date: August 7, 2014
    Applicant: Audi AG
    Inventor: Marco Willems
  • Publication number: 20140197586
    Abstract: A spring and damping device for a wheel suspension in motor vehicles includes an upper region, a lower region, and a damping element arranged between the upper region and the lower region. The device further includes a coil spring element and a rubber spring element. The coil spring element and the rubber spring element are arranged one behind the other along a center axis of the damping element such that the coil spring element is positioned to exert a force on the rubber spring element. The device allows a spring rate to be adjusted based either on sensed conditions, or by driver input. The spring rate may be adjustable between discrete settings or continuously variable.
    Type: Application
    Filed: January 16, 2014
    Publication date: July 17, 2014
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: Friedrich Peter WOLF-MONHEIM
  • Patent number: 8777192
    Abstract: A hydromount absorbs and alleviates vibration of driving components such as an engine, a power train, a transmission, and the like of a vehicle, and more particularly, to a three point supporting hydromount in which inner pipes are disposed in a horizontal direction of a vehicle frame.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: July 15, 2014
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Daeheung R&T Co., Ltd.
    Inventors: Hyo-Seok Kim, Hyun-Chul Sohn
  • Patent number: 8740200
    Abstract: A fluid-elastomeric damper assembly operable for damping relative motion between a first structure and a second structure including a housing structure grounded to the first structure and a plurality of elastomer seals coupled to the housing structure, the housing structure and the plurality of elastomer seals defining a fluid-elastomeric chamber operable for containing a fluid. The fluid-elastomeric damper assembly also including one or more piston structures disposed within the housing structure and the fluid-elastomeric chamber, the one or more piston structures grounded to the first structure and driven by the second structure, and the one or more piston structures each including a first fluid chamber and a second fluid chamber in communication via an orifice, the first substantially fluid-filled chamber and the second substantially fluid-filled chamber also in communication with the fluid-elastomeric chamber through a fluid backfiller.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: June 3, 2014
    Assignee: LORD Corporation
    Inventor: Donald D. Russell
  • Publication number: 20140138889
    Abstract: A suspension device/damper for vehicles is provided, which includes a hydraulic damping unit (11) substantially acting linearly having a piston (20) provided with a guide rod (21) and operating in a chamber (16) containing an incompressible fluid. With the hydraulic damping unit (11) is combined a pneumatic damping unit (12) having progressive effect, activated by and collaborating with the damping action of said hydraulic unit. The pneumatic damping unit (12) includes a pressing head (23) operating through an elastic membrane (24) onto an air cushion (25) with a variable effect in response to the movements of the piston (20) in the chamber containing the incompressible fluid of the hydraulic damping unit (11).
    Type: Application
    Filed: May 21, 2012
    Publication date: May 22, 2014
    Inventors: Giuseppe Bellandi, Graziano Mafezzoni
  • Publication number: 20140097293
    Abstract: A landing gear strut incorporating an oleo-pneumatic shock absorber with a bungee return spring. An oleo-pneumatic shock absorber is a device engineered for slowing down a moving mass. The shock absorber converts the kinetic energy of the impact into heat due to the friction of oil being driven through narrow orifices. The shock then recovers using air and or spring pressure. The recovery is governed by the flow rate of the fluid to the original reservoir. In the case of an aircraft this results in less bounce, shorter stop time, smoother overall ride, and safer landings.
    Type: Application
    Filed: October 10, 2012
    Publication date: April 10, 2014
    Inventor: John Charles Roberts
  • Patent number: 8622376
    Abstract: A vibration isolator for insertion into a support structure opening includes a first isolator body having a first body portion at a first body end and a first isolator wall extending from the first body portion toward a second body end. The first body portion has a larger perimeter than the second body end and defines a first fastener opening and the second body end defines a second fastener opening. The second fastener opening has a perimeter greater than the perimeter of the first fastener opening. The first body portion has a perimeter that is at least three times greater than the perimeter of the first fastener opening and at least two times greater than the perimeter of the support structure opening.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 7, 2014
    Inventor: Normand R. Lavigne
  • Publication number: 20130313767
    Abstract: Provided is a suspension spring for a shock absorber using carbon fiber reinforced plastic. From a structure including a spring unit in which a plurality of bowl-shaped unit bodies are stacked between a first sheet and a second sheet along a length direction of a piston rod, the suspension spring for the shock absorber can achieve weight reduction and durability improvement while exhibiting the same performance as that of steel coil spring by using the carbon fiber reinforced plastic.
    Type: Application
    Filed: May 10, 2013
    Publication date: November 28, 2013
    Inventor: MANDO CORPORATION
  • Publication number: 20130234377
    Abstract: A gas spring and gas damper assembly can include a gas spring and a gas damper. The gas spring can include a first end member, a second end member and a flexible wall that at least partially form a spring chamber. The gas damper can include first, second and third damper elements that are telescopically interconnected with one another. The first and third damper elements can be operatively connected to the first and second end members. The second damper element can be operatively supported between the first and third damper elements. First and second biasing elements can be operatively interconnected between the second damper element and one of the first and third damper elements. A method of assembling a gas spring and gas damper assembly is also included.
    Type: Application
    Filed: April 17, 2013
    Publication date: September 12, 2013
    Applicant: Firestone Industrial Products Company, LLC
    Inventor: Joshua R. Leonard
  • Patent number: 8430373
    Abstract: A fluid-filled type vibration damping device including a resin bracket provided on an outside peripheral face of a second mounting member. The resin bracket includes a mating portion mated within a mating groove of the second mounting member opening in an outside peripheral face of the second mounting member, a mating tubular portion extending on the outside peripheral face of the second mounting member from the mating portion to one axial side, and a mounting portion which is formed at a distal end portion of the mating tubular portion on the one axial side and extends peripherally outward. A weight reducing space opens at a distal end face of the mating tubular portion on the one axial side while extending between an inside peripheral face of the mating tubular portion and the outside peripheral face of the second mounting member in a circumferential direction.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: April 30, 2013
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Naoki Nishi, Daisuke Fukunaga, Tetsuya Miyahara, Keisuke Kawabe
  • Publication number: 20130062822
    Abstract: A fluid-filled cylindrical vibration-damping device including at least one orifice member attached to an inside of an outer cylindrical member so as to straddle openings of pocket portions and extend in a circumferential direction. An orifice passage is defined by covering an orifice forming groove of the orifice member with the outer cylindrical member. A stopper mechanism is constituted by contact between an inner shaft member and the outer cylindrical member via the orifice member. A reinforcing rib is formed in the orifice member so as to project from a bottom face of the orifice forming groove and extend in the circumferential direction while a projecting distal end face thereof is in contact with the outer cylindrical member. The reinforcing rib partitions at least a portion of a circumference of the orifice passage into a plurality of passages that have same fluid flow characteristics.
    Type: Application
    Filed: September 11, 2012
    Publication date: March 14, 2013
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventor: Toru MATSUSHITA
  • Patent number: 8393444
    Abstract: Suspension protection devices and methods involve a suspension mount engagement member configured to contact a suspension mount of a vehicle, a tire engagement member configured to contact a tire of the vehicle, and a rebounding assembly coupled between the suspension mount engagement member and the tire engagement member. The rebounding assembly can include a support, a first rebounding member, and a second rebounding member, wherein the first rebounding member is more compressible than the second rebounding member.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: March 12, 2013
    Inventor: Jeffery Martin
  • Patent number: 8349154
    Abstract: The invention relates to modified electrodes for ER fluids prepared by adding a rough, wear-resisting, and low conductive modified layer on the surface of metallic electrodes. The material for the modified layer can be at least one from diamond, alumina, titanium dioxide, carborundum, titanium nitride, nylon, polytetrafluoroethylene, adhesive, and adhesive film. Through the addition of the modified layer, the adhesion of the ER fluid to electrodes is increased so that the shear stress measured near the plates is close to the intrinsic value, which makes the ER fluid applicable, while reducing the leakage current and increasing the breakdown voltage of the ER fluid equipment.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: January 8, 2013
    Assignee: Institute of Physics, Chinese Academy of Sciences
    Inventors: Kunquan Lu, Rong Shen, Xuezhao Wang
  • Patent number: 8333368
    Abstract: A hydraulically damped mounting device has first and second anchor parts connected by a first deformable wall, and a working chamber for hydraulic fluid partially bounded by the first deformable wall. The working chamber is connected to a composition chamber for the hydraulic fluid by a first passageway, the composition chamber being partially bounded by a second deformable wall. There is also an auxiliary chamber partially bounded by a third deformable wall connected to the working chamber by a second passageway. The mounting device then has a vacuum chamber connectable to a vacuum source for varying the pressure in the vacuum chamber.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: December 18, 2012
    Assignee: DTR VMS Limited
    Inventor: Michael Paul Rooke
  • Patent number: 8317172
    Abstract: A multistage jounce bumper, including a jounce bumper cushion integrated with a hydraulic jounce bumper, wherein provided are the damping characteristic of the hydraulic jounce bumper and the damping/spring characteristics of a jounce bumper cushion. The hydraulic jounce bumper hydraulic response is tunable via adjustment of hydraulic flow with respect to a communicating hydraulic fluid reservoir. When maximum jounce is approached, jounce force and energy are exchanged, at a first stage, with the jounce bumper cushion, then at a predetermined compression, jounce force and energy are exchanged, at a second stage, with the hydraulic jounce bumper. Thereafter, a mechanical abutment is provided as a third stage of jounce management.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: November 27, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Shawn G. Quinn, Gregory J. Fadler, William C. Gregory
  • Patent number: 8297602
    Abstract: A vibration isolator having a pair of pressure receiving fluid chambers between an outer cylinder and a mounting member, at two end sides along a main amplitude direction. A rubber elastic body changes the internal volumes of the pair of pressure receiving fluid chambers in directions opposite to each other, and fluid flows from the pressure receiving fluid chambers to an auxiliary fluid chamber through one of two orifices and flows from the auxiliary fluid chamber to the pressure receiving fluid chambers through the other orifice. Since a fluid pressure in the auxiliary fluid chamber is kept approximately constant, the fluid in the pair of pressure receiving fluid chambers smoothly flows, with a low resistance, into the auxiliary fluid chamber through the orifices. Therefore, any rise of the fluid pressure in the pressure receiving fluid chambers may be suppressed, such that rise of the dynamic spring constant may be suppressed.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: October 30, 2012
    Assignee: Bridgestone Corporation
    Inventors: Hiroshi Kojima, Yoshitaka Otsubo
  • Publication number: 20120261869
    Abstract: A variable semi-active damping assembly comprising a shock body defining a fluid-filled chamber; a piston tube having a first end slidably disposed within the shock body; an inner rod slidably disposed within the piston tube and the shock body, the inner rod having a first end connected to a lower piston mount and a second end extending outward from the piston tube and engaging an adjustment mechanism that is configured to move the inner rod with respect to the shock body; an upper piston mount slidably disposed within the shock body and connected to the piston tube; and a deformable member disposed between the lower piston mount and the upper piston mount, the deformable member being configured to transition between a compressed state and a non-compressed state in response to movement by the lower piston mount.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Inventor: Phillip D. Rodenbeck
  • Patent number: 8240644
    Abstract: A hydraulic anti-vibration mount having two damping modes, is disclosed comprising two support members, an elastomer body that connects the two support members to each other, a working chamber, a first structural plate with a check valve, a calibrated hole, a first restricted passage linking the working chamber to an intermediate chamber, a second structural plate having a main port, a second restricted passage, linking the intermediate chamber to a compensation chamber, an auxiliary chamber supplied by the check valve and emptied by the calibrated hole, and equipped with a flexible membrane arranged for deforming and closing the main port, to switch between the two damping modes.
    Type: Grant
    Filed: October 15, 2009
    Date of Patent: August 14, 2012
    Assignee: Hutchinson
    Inventors: Gabriel Lemaire, Pascal Petit
  • Patent number: 8231115
    Abstract: A hydraulic mount has an upper support member and a lower support member. An upper elastomeric spring and a lower elastomeric spring are disposed between the upper support member and the lower support member to define an upper fluid chamber and a lower fluid chamber. A channel extends between the upper and lower chambers. During compression and extension of the hydraulic mount, fluid transfers between the upper and lower chamber to provide a damping force for the hydraulic mount.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: July 31, 2012
    Assignee: The Pullman Company
    Inventors: Robert J. Goudie, Zoren E. Gaspar
  • Patent number: 8231116
    Abstract: A fluid filled type vibration damping device wherein an outer tubular mounting member is externally fitted onto the collar sleeve at an externally fitted section formed by a tapered tube portion of the outer tubular mounting member, by means of a diameter reduction process. A mating projection projecting diametrically inward is formed on an inside peripheral face of the outer tubular mounting member, while a seal rubber layer having a thickness greater than a projecting height of the mating projection is formed covering the inside peripheral face of the outer tubular mounting member with the mating projection covered by the seal rubber layer. A location and projecting height of the mating projection are arranged so as to prevent an entry of another outer tubular mounting member into a large-diameter opening of the tapered tube portion during pre-treatment.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: July 31, 2012
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Naoki Nishi
  • Patent number: 8210508
    Abstract: A bump stopper for a suspension system that has at least a parting line along a longitudinal direction of the bumper stopper, may include at least two convex portions coaxially connected each other in the longitudinal direction of the bump stopper and contacting each other in a compressed state, a first array including first reinforcing blocks integrally formed on the respective convex portions along the parting line, each abutting first reinforcing block having a first contact angle therebetween in the longitudinal direction of the bumper stopper, and a second array including second reinforcing blocks integrally formed on the respective convex portions, each abutting second reinforcing block having a second contact angle therebetween in the longitudinal direction of the bumper stopper, wherein the first array is disposed with a predetermined angle from the first array along a circumferential direction of the bumper stopper.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: July 3, 2012
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Seong Wook Hwang
  • Patent number: 8191875
    Abstract: A hydraulic engine mount assembly includes a support bracket defining a passageway that communicates between a pair of fluid chambers formed in an elastomeric body. According to one embodiment, the mount includes first and second connection devices for respectively connecting the engine mount to first and second connection surfaces.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: June 5, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventor: John L. Kern
  • Patent number: 8191876
    Abstract: A fluid-filled type vibration damping device wherein a second mounting member is secured to a vehicle body; an opening of the second mounting member is closed off to define a pressure-receiving chamber a flexible film is arranged covering an outside of a main rubber elastic body to define an equilibrium chamber; a low-frequency orifice passage and a high-frequency orifice passage connect the pressure-receiving chamber and the equilibrium chamber a first moveable member is disposed on a fluid channel through the high-frequency orifice passage; the first moveable member being supported by a first support member that is linked to the second mounting member via the main rubber elastic body; and a fluid channel through the low-frequency orifice passage is situated away from the placement location of the first moveable member.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: June 5, 2012
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Tomohiro Kanaya, Masaaki Hamada, Masahiro Ohnishi
  • Patent number: 8177201
    Abstract: A hydraulic mount has an upper support member and a lower support member. An upper elastomeric spring and a lower elastomeric spring are disposed between the upper support member and the lower support member to define an upper fluid chamber and a lower fluid chamber. A channel extends between the upper and lower chambers. During compression and extension of the hydraulic mount, fluid transfers between the upper and lower chamber to provide a damping force for the hydraulic mount.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: May 15, 2012
    Assignee: The Pullman Company
    Inventor: Robert J. Goudie
  • Patent number: 8177202
    Abstract: The damping device is intended to form a drag-mode damper for a helicopter blade, and is incorporated in an aircraft rotor system. This damping device comprises: an external frame intended to be coupled to a first rotating element, and a radially internal element mounted coaxially to the frame and intended to be coupled to a second rotating element; at least one elastomer damper of annular cross section mounted fixedly to the frame and to the internal element; and a working chamber bounded by the frame and by the damper and communicating with a compensation chamber bounded by a highly deformable flexible member mounted coaxially to the internal element. The working chamber is formed at a first end of the device and communicates with the compensation chamber via a porous structure surmounting an end opening of the flexible member, which member is mounted in the internal element.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 15, 2012
    Assignee: Hutchinson
    Inventors: Hervé Richer De Forges, Jean-Pierre Ciolczyk
  • Publication number: 20120097824
    Abstract: A hydraulic bushing having at least two chambers and at least one channel connecting the chambers. The bushing is made of a high durometer rubber or other polymer to increase durability. The bushing further includes a center bearing press fit in the center of the annular bushing. The bushing is further press fit into an annular seal operable to seal the fluid within the chambers and channels. The bearing, bushing, and seal assembly is then press fit into a bracket which is subsequently mounted to the vehicle. The center bearing is operable to hold the prop shaft wherein the center bearing is free to rotate within the bushing thereby allowing the prop shaft to rotate.
    Type: Application
    Filed: October 21, 2011
    Publication date: April 26, 2012
    Inventors: Alain Rene Regis Giraud, Travis Jon Grassmid, Donald Paul Price
  • Patent number: 8104749
    Abstract: A vibration damping device having a rubber heat-insulating cover wherein the rubber heat-insulating cover is formed as a separate component from a stopper member and is disposed between the stopper member and a main rubber elastic body connecting a first and second mounting member. The rubber heat-insulating cover is fixed to the stopper member with a center section of the rubber heat-insulating cover juxtaposed from an inner face side against a strike plate portion of the stopper member to be supported by the strike plate portion. With a peripheral wall section of the rubber heat-insulating cover juxtaposed from the inner face side against leg portions of the stopper member to be supported by the leg portions. A cushioning rubber is integrally formed with the center section of the rubber heat-insulating cover supported on the strike plate portion, and projects towards the first mounting member.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: January 31, 2012
    Assignees: Tokai Rubber Industries, Ltd., Honda Motor Co., Ltd.
    Inventors: Kei Okumura, Tomohiro Kanaya, Hitoshi Naito
  • Patent number: 8087647
    Abstract: A fluid filled type cylindrical vibration damping device, wherein a circumferential end of a stopper member is formed as a mating element smaller in diameter than a circumferentially center section of the stopper member, and is juxtaposed against and supported on a bottom face of a mating groove in a communication passage, to form the communication passage along an entire area between diametrically opposed faces of the mating element and an outer tubular member. A cutout portion is formed extending in a circumferential direction from a circumferential end in a widthwise medial section of the mating element, with the communication passage opening into and communicating with a first fluid chamber at a distal end section of the cutout portion, and at two widthwise side sections of the mating element, respectively, thereby defining an orifice passage connecting the first fluid chamber with a second fluid chamber.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: January 3, 2012
    Assignee: Tokai Rubber Industries, Ltd.
    Inventor: Masami Endo
  • Patent number: 8083217
    Abstract: A Fluid-filled type vibration damping device, which is configured to be free from the necessity of supplying a continuous application of electricity to a coil so as to maintain a movable valve body in either an opened state or a closed state, is provided. The device includes a cam mechanism, which transmits a rotational drive force of a motor to the movable valve body in the form of a reciprocating drive force. In the device, a first rotation angle switch is connected to a first control switch in series relative to a motor coil, and a second rotation angle switch is connected to a second control switch in parallel relative to the first switch. The first rotation angle switch is turned on in a state of a first angular range ?1, and the second rotation angle switch is turned on in a third angular range ?3. When the first control switch and the second control switch receive the same control signal, they are brought into respective inverted ON/OFF states.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: December 27, 2011
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hironori Koyama, Koichi Hasegawa, Atsushi Muramatsu
  • Patent number: 8002093
    Abstract: A damper includes a hollow outer elongated body; a hollow inner elongated body; a liquid viscous body or liquid viscoelastic body disposed in a gap between an inner surface of the elongated body and an outer surface of the elongated body in such a manner as to be in contact with the inner surface and the outer surface of these elongated bodies, respectively; and first and second attaching structures. Further, a controller may be provided to control an increase or decrease in the internal pressure of the liquid viscous body or the liquid viscoelastic body.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: August 23, 2011
    Assignee: Oiles Corporation
    Inventors: Masami Mochimaru, Sumio Kawaguchi, Mitsuru Miyazaki, Akio Suzuki
  • Patent number: 7980537
    Abstract: A vibration isolator which is capable of stably opening and closing an orifice is provided at low manufacturing cost. A plunger for opening and closing an idle orifice is disposed in a manner that is slidably engaged with the inner wall surface of an orifice-forming member. A shaft portion extending downward is formed in the central portion of the plunger. A convex portion which is formed with a through-hole in which the shaft portion is slidably is provided on the bottom of the orifice-forming member so as to provide a bearing portion. The shaft portion of the plunger and the bearing portion of the orifice-forming member constitute a guide member for guiding the reciprocating motion of this plunger.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: July 19, 2011
    Assignee: Bridgestone Corporation
    Inventors: Akira Ueki, Hironori Adachi